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In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def checkDistance(self, position, minDist, m): lastBallPos = position[0] ballLeft = m - 1 i = 1 while i < len(position) and ballLeft != 0: if minDist <= position[i] - lastBallPos: lastBallPos = position[i] ballLeft -= 1 i += 1 return ballLeft == 0 def maxDistance(self, position: List[int], m: int) -> int: position.sort() print(position) high = 1000000000 low = 1 ans = 1 while low < high: middle = (high + low + 1) // 2 if self.checkDistance(position, middle, m): low = middle else: high = middle - 1 print(high, low) return low
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def can_place(force): count = 1 curr = position[0] for i in range(1, len(position)): if position[i] - curr >= force: count += 1 curr = position[i] return count position.sort() lo, hi = 0, position[-1] - position[0] while lo < hi: mid = (lo + hi + 1) // 2 if can_place(mid) >= m: lo = mid else: hi = mid - 1 return lo
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() left = 1 right = (position[-1]-position[0]) // (m-1) + 1 while left<right: mid = (left+right)//2 if self.can(position, mid, m): left = mid + 1 else: right = mid return left if self.can(position, left, m) else left-1 def can(self, position, mid, m): n = len(position) pos = [0 for i in range(m)] i = 1 j = 1 while i < n and j < m: if position[i] - position[pos[j-1]] >= mid: pos[j] = i j += 1 i += 1 if j==m: return True return False
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() def count(d): ans, curr = 1, position[0] for i in range(1, n): if position[i] - curr >= d: ans += 1 curr = position[i] return ans l, r = 0, position[-1] - position[0] while l < r: mid = r - (r - l) // 2 if count(mid) >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def check(self,position,m,mid): lastpos=position[0] rem=m-1 i=1 while i<len(position) and rem: if position[i]-lastpos<mid: i+=1 else: rem-=1 lastpos=position[i] return rem==0 def maxDistance(self, position: List[int], m: int) -> int: position.sort() low=1 high=10**9 while low<high: mid=low+(high-low)//2 if self.check(position,m,mid): low=mid+1 else: high=mid return low-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: # binary search O(NlogQ), n = len(position), q = max(position) position.sort() def maxBalls(d): # O(N), if distance >= d, how many magnetic balls can be placed? count, p = 0, -d for x in position: if x - p >= d: count, p = count + 1, x return count l, r = 0, max(position) while l < r: d = r - (r - l) // 2 if maxBalls(d) >= m: l = d else: r = d - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() # all_dists = set() # for i in range(len(position) - 1): # for j in range(i + 1, len(position)): # all_dists.add(position[j] - position[i]) # all_dists_list = list(all_dists) # all_dists_list.sort(reverse=True) lo = 1 hi = position[-1] while lo < hi: dist = (hi + lo) // 2 + 1 if self.maxBalls(position, dist) >= m: lo = dist else: hi = dist - 1 # print(lo, hi) return lo def maxBalls(self, sorted_position: List[int], distance: int) -> int: l_ind = 0 r_ind = 1 count = 1 while r_ind < len(sorted_position): if sorted_position[r_ind] - sorted_position[l_ind] >= distance: count += 1 l_ind = r_ind r_ind += 1 return count
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() # print(position) high=int((position[-1]-position[0])/(m-1)) low=0 while high-1>low: mid=int((high+low)/2) # print('high:'+str(high)+'low:'+str(low)+'mid:'+str(mid)) if self.helper(position,mid,m): # print('True') low=mid else: # print('False') high=mid-1 if self.helper(position,high,m): return high else: return low def helper(self,position,max_d,m): count=1 pre_ind=0 ind=1 while ind<len(position): if count>=m: break # print('ind:'+str(ind)+'count:'+str(count)) if position[ind]-position[pre_ind]<max_d: ind+=1 else: pre_ind=ind ind+=1 count+=1 if count>=m: return True else: return False
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() lo, hi = 1, 10**9 while hi>lo: mid = (lo+hi+1)//2 lapo = position[0] co = 1 for po in position[1:]: if po-lapo >= mid: lapo = po co += 1 if co >= m: lo = mid else: hi = mid-1 return lo
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) def count(d): res = 1 curr = position[0] for i in range(1,n): if position[i] - curr >= d: res += 1 curr = position[i] return res l = 0 r = position[-1] - position[0] while l < r: mid = (l + r + 1) // 2 if count(mid) >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: arr = sorted(position) if m == 2: return arr[-1] - arr[0] def check(n): cnt = 2 pre = arr[0] for i in range(1, len(arr) - 1): if arr[i] - pre >= n: pre = arr[i] cnt += 1 if cnt == m: break return cnt == m and arr[-1] - pre >= n lo, hi = 1, arr[-1] - arr[0] while lo <= hi: mi = lo + (hi - lo) // 2 if check(mi): lo = mi + 1 else: hi = mi - 1 return hi
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position = sorted(position) def is_good(position, target_distance, m): prev = position[0] count = 1 for i in range(1, len(position)): pos = position[i] if pos - prev >= target_distance: prev = pos count += 1 if count == m: return True return False left = 1 right = max(position) while right > left + 1: mid = (left+right)//2 if is_good(position, mid, m): left = mid else: right = mid if is_good(position, right, m): return right else: return left
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def count(d): curr = position[0] ans = 1 for i in range(1, len(position)): if position[i] - curr >= d: ans += 1 curr = position[i] return ans l, r = 0, position[-1] - position[0] while l < r: mid = r - (r - l) // 2 c = count(mid) if c >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: minp,maxp = min(position),max(position) if m == 2: return maxp-minp position.sort() def valid(i): count = 1 ending = position[0] for j in range(1,len(position)): if position[j] >= ending+i: count += 1 ending = position[j] return True if count >= m else False left,right = 0, maxp-minp+1 while right-left > 1: #print(left,right) mid = left+(right-left)//2 if valid(mid): left = mid else: right = mid return left
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def distributable(n): pos = len(position) - 1 balls = m while pos >= 0 and balls: balls -= 1 np = position[pos] - n while pos >= 0 and position[pos] > np: pos -= 1 return not balls position = sorted(position) lo, hi = 1, (position[-1] - position[0]) // (m -1) + 1 ans = lo while lo < hi: mid = lo + (hi - lo) // 2 if distributable(mid): ans = mid lo = mid + 1 else: hi = mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, pp: List[int], k: int) -> int: n=len(pp) pp.sort() l=1 r=pp[-1]-pp[0]+1 def ok(m): i=1 pre=pp[0] for _ in range(k-1): while i<n and pp[i]-pre<m:i+=1 if n==i:return False pre=pp[i] i+=1 return True while l+1<r: m=(l+r)//2 if ok(m):l=m else:r=m return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def foo( d): ans = 1; last = position[0] for i in range( 1, len( position)): if position[i] - last >= d: ans += 1 last = position[i] return ans left = 0; right = position[-1] - position[0] while left < right: mid = right - ( right - left) // 2 if foo( mid) >= m: left = mid else: right = mid - 1 return left
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) def check(d): k, pre = 1, position[0] for i in range(1, n): if position[i] - pre >= d: k += 1 pre = position[i] return k >= m lo, hi = 0, position[-1] - position[0] while lo < hi: mid = hi - (hi - lo) // 2 if check(mid): lo = mid else: hi = mid - 1 return lo
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def can_reach(force): last = position[0] placed = 1 for i in range(1, len(position)): pos = position[i] if pos - last >= force: last = pos placed += 1 if placed >= m: break return placed >= m l = 1 r = position[-1] - position[0] + 1 while l < r: mid = (l+r)//2 if not can_reach(mid): r = mid else: l = mid+1 return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l, r = 0, 10**9 + 2 while l < r: mid = (l + r) // 2 prev = position[0] cnt = 1 for p in position: if p >= prev + mid: prev = p cnt += 1 # print(l, r, mid, cnt) if cnt < m: r = mid else: l = mid + 1 return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def c(p,m,d): b=m-1 l=len(p) acc=0 for i in range(1,l): acc+=p[i]-p[i-1] if acc>=d: acc=0 b-=1 if b==0: return True return False low=1 high=1000000000 mid=0 position.sort() while low<=high: mid=(low+high)//2 if c(position,m,mid): low=mid+1 else: high=mid-1 return high
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def possible(num): Count, pos = 1, 0 for i in range(1, len(position)): if position[i] - position[pos] >= num: pos = i Count += 1 if Count==m: return True return Count >= m def search(left,right): if left == right: return left mid = (left + right)//2 if possible(mid) and not possible(mid + 1): return mid elif possible(mid): return search(mid + 1, right) return search(left, mid - 1) return search(1, position[-1] - position[0])
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, positions: List[int], m: int) -> int: positions.sort() # try to add balls and record the position def check(mid): p = 0 count = 0 for q in range(len(positions)): if positions[q] - positions[p] >= mid: p = q count += 1 return count >= m-1 low, high = 0, positions[-1]-positions[0] # print(low, high) res = 0 while low <= high: mid = (low + high)//2 if check(mid): low = mid + 1 res = max(res, mid) else: high = mid - 1 return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: # def feasible(distance): # balls, curr = 1, position[0] # for i in range(1, len(position)): # if position[i]-curr >= distance: # balls += 1 # curr = position[i] # return balls >= m # position.sort() # left, right = 0, position[-1]-position[0] # while left<right: # mid = left + (right-left)//2 # if feasible(mid): # right = mid # else: # left = mid+1 # return left n = len(position) position.sort() def count(d): ans, curr = 1, position[0] for i in range(1, n): if position[i] - curr >= d: ans += 1 curr = position[i] return ans l, r = 0, position[-1] - position[0] while l < r: mid = r - (r - l) // 2 if count(mid) >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: lo = 1 hi = 10**18 position.sort() def func(mid): cnt = 1 cur = position[0] for i in range(1,len(position)): if position[i]>=cur+mid: cur = position[i] cnt+=1 if cnt>=m: return True else: return False while lo<hi: mid = (lo+hi)//2 x = func(mid) if x==True: lo = mid else: hi = mid if hi-lo==1: break if func(hi)==True: return hi return lo
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def helper(pos, mid, k): temp = pos[0] done = 1 for i in range(1, len(pos)): if pos[i] - temp >= mid: temp = pos[i] done += 1 if done == k: return True return False position.sort() res = -1 l, r = 0, position[-1] while l < r: mid = l + (r - l) // 2 if helper(position, mid, m): res = max(res, mid) l = mid + 1 else: r = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position = sorted(position) m_vals = [] distance = position[-1] - position[0] def works(min_dist): i = 1 count = 1 prev = 0 while count < m and i < n: if position[i] - position[prev] >= min_dist: count += 1 prev = i i += 1 return count == m low = 0 high = 1 << 32 while high - low > 1: mid = (low + high) // 2 if works(mid): low = mid else: high = mid - 1 if works(high): return high return low
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, positions: List[int], m: int) -> int: positions.sort() def valid(mid): count = 0 last = -math.inf for pos in positions: if pos >= last + mid: count += 1 last = pos return count >= m left, right = 0, positions[-1] while left <= right: mid = (left + right) // 2 if valid(mid): left = mid + 1 else: right = mid - 1 return right
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
# class Solution: # def maxDistance(self, position: List[int], m: int) -> int: # position.sort() # def check(d): # k = 1 # pre = position[0] # for i in range(1, len(position)): # if position[i] - pre >= d: # k += 1 # pre = position[i] # return k >= m # lo, hi = 0, position[-1] - position[0] # while lo < hi: # mid = (lo + hi)//2 # if check(mid): # lo = mid # else: # hi = mid - 1 # return lo class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() def count(d): ans, curr = 1, position[0] for i in range(1, n): if position[i] - curr >= d: ans += 1 curr = position[i] return ans l, r = 0, position[-1] - position[0] while l < r: mid = r - (r - l) // 2 if count(mid) >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def isSafe(self,lst,m,key): n = len(lst) pre = lst[0] index = 1 while(index<n): while(index<n and lst[index]-pre<key): index+=1 m-=1 if(m==0): return True if(index==n): return False pre = lst[index] return False def maxDistance(self, lst: List[int], m: int) -> int: lst.sort() n = len(lst) low = 0 high = lst[-1] - lst[0] ans = 0 while(low<=high): mid = (low+high)//2 if(self.isSafe(lst,m,mid)): ans = mid low = mid + 1 else: high = mid - 1 return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, pos: List[int], m: int) -> int: pos.sort() n = len(pos) def check(gap): i = 0 ii = 0 nn = 1 while i < n: if pos[i] - pos[ii] >= gap: nn += 1 ii = i i += 1 return nn < m l = float('inf') for i in range(n-1): l = min(l, pos[i+1] - pos[i]) r = pos[-1] - pos[0] + 1 while l < r: mid = (l + r) // 2 if check(mid): r = mid else: l = mid + 1 return l - 1 # if check(l): # return l # else: # return l - 1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
import numpy as np import itertools as it class Solution: # # def maxDistance(self, position: List[int], m: int) -> int: # arr = np.sort(position) # md = max(arr) # # print(arr) # combList = list(it.combinations(arr, m)) # # print(combList) # maxmindiff = 0 # targetList = [] # for comb in combList: # cb = list(it.combinations(comb, 2)) # minDiff = md # for k in range(len(cb)): # curDiff = abs(cb[k][0]-cb[k][1]) # if curDiff< minDiff: # minDiff= curDiff # if minDiff>maxmindiff: # maxmindiff = minDiff # targetList = comb # # print(maxmindiff) # # print(targetList) # return maxmindiff def maxDistance(self, position: List[int], m: int) -> int: arr = np.sort(position) arr = arr -np.min(arr) print(arr) def isFeasible(mid, arr, m): pos = arr[0] n = len(arr) count = 1 for i in range(n): if arr[i] - pos>=mid: pos = arr[i] count+=1 if count>=m: return True return False left = arr[0] right = arr[-1] if m ==2: return right-left res = -1 count = 0 while left < right: # mid = np.ceil((right+left)/2) mid = (right+left)//2 # mid = right-(right-left)//2 # print(mid) count +=1 if isFeasible(mid, arr, m): res = max(res,mid) left = mid +1 else: right = mid print(count) return int(res) ############################3 # class Solution: # def maxDistance(self, position: List[int], m: int) -> int: # n = len(position) # position.sort() # def count(d): # ans, curr = 1, position[0] # for i in range(1, n): # if position[i] - curr >= d: # ans += 1 # curr = position[i] # return ans # l, r = 0, position[-1] - position[0] # while l < r: # mid = r - (r - l) // 2 # if count(mid) >= m: # l = mid # else: # r = mid - 1 # return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) low, high = 1, 10 ** 9 answer = 0 while low <= high: mid = (low + high) >> 1 cnt = 0 temp = -(10 ** 9) for i in position: if i - temp >= mid: cnt += 1 temp = i if cnt >= m: answer = max(answer, mid) low = mid + 1 else: high = mid - 1 return answer
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def fun(self, arr, dist): pos = arr[0] cows = 1 for i in range(1, len(arr)): e = arr[i] if e-pos >= dist: pos = e cows += 1 if cows == self.m: return True return False def bs(self, arr): lef = 0 rit = arr[-1] while lef < rit: mid = (lef+rit)//2 # print('mid, mid+1', mid, mid+1) me = self.fun(arr, mid) nex = self.fun(arr, mid+1) # print('me, nex', me, nex) if me and not nex: return mid elif me and nex: lef = mid + 1 else: rit = mid - 1 # print('lef, rit', lef, rit) return lef def maxDistance(self, position: List[int], m: int) -> int: self.m = m position.sort() return self.bs(position)
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def isFeasible(positions, mid, k): taken = 1 last = positions[0] for i in range(1, len(positions)): if positions[i] - last >= mid: taken += 1 last = positions[i] return taken >= k def largestMinDist(positions, n, k): low = 0 high = max(positions) - min(positions) + 1 while high - low > 1: mid = (low + high) // 2 if isFeasible(positions, mid, k): low = mid else: high = mid return low n = len(position) position = sorted(position) ''' if m == len(position): ans = max(position) - min(position) for i in range(1, n): diff = position[i] - position[i - 1] if diff < ans: ans = diff return ans ''' return largestMinDist(position, n, m)
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l=1 r=position[-1] pos=0 print((l,r)) def check(mid): cow_cnt=1 last_pos=position[0] for i in range(1,len(position)): if position[i]-last_pos>=mid: cow_cnt+=1 if cow_cnt==m: return True last_pos=position[i] return False while l<=r: mid=l+(r-l)//2 if check(mid): pos=mid l=mid+1 # print(mid) else: r=mid-1 return pos
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def check(pos): placed = 1 i = 0 j = 1 while j < l: if position[j] - position[i] >= pos: placed +=1 if placed == m: return True i = j j = i + 1 else: j +=1 return (True if placed == True else False) l = len(position) mx = max(position) - min(position) position.sort() lo = 1 hi = mx ans = -1 while lo <= hi: mid = lo + (hi - lo) // 2 if check(mid): ans = mid lo = mid + 1 else: hi = mid - 1 return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def check(dist): balls = m prev = None res = float('inf') for p in position: if prev is None or p - prev >= dist: if prev: res = min(res, p - prev) prev = p balls -= 1 if balls > 0: return None return res lo, hi = 1, (position[-1] - position[0]) // (m - 1) res = 0 # print('lohi', lo, hi) while lo <= hi: mid = (lo + hi) // 2 r = check(mid) # print('dist', mid, res) if r: res = r lo = mid + 1 else: hi = mid - 1 return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() mn = sys.maxsize mx = position[-1] - position[0] for i in range(1, len(position)): mn = min(mn, position[i] - position[i-1]) def isPoss(diff): count = 1 start = 0 cd = 0 f = sys.maxsize for i in range(1, len(position)): if cd + position[i] - position[i-1] < diff: cd += position[i] - position[i-1] else: count += 1 f = min(f, position[i] - position[start]) start = i cd = 0 if count == m: break if count == m: return f return -1 ans = -1 while mn <= mx: mid = (mn + mx)//2 v = isPoss(mid) if v != -1: ans = v mn = mid + 1 else: mx = mid - 1 return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
import bisect class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) def possible(gap): prev = position[0] idx = 0 left = m - 1 while left > 0: idx = bisect.bisect_left(position, prev+gap, idx + 1, n) if idx >= n: return False else: prev = position[idx] left -= 1 return True position.sort() min_gap = 1 max_gap = position[-1] - position[0] while min_gap < max_gap: cur_gap = (min_gap + max_gap + 1) // 2 if possible(cur_gap): min_gap = cur_gap else: max_gap = cur_gap - 1 return min_gap
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position, m): position.sort() n = len(position) def canFit(gap): ct = 1 i = 0 j = 1 while j < n: while j<n and position[j]-position[i] < gap: j += 1 # print(i, j, ct) if j<n: ct += 1 i = j j += 1 if ct == m: return True return False # print(canFit(999999999)) lo = 1 hi = position[-1] - position[0] res = 0 ct = 0 while lo<=hi: mid = (lo + hi) >> 1 ct += 1 if canFit(mid): res = mid lo = mid + 1 else: hi = mid - 1 return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: if len(position) < m: return 0 position.sort() def can(force): cnt = 1 pos = 0 for i in range(1, len(position)): if position[i] - position[pos] >= force: cnt += 1 pos = i return cnt >= m low, high = 0, position[-1] - position[0] while low < high: mid = (low + high + 1) // 2 if can(mid): low = mid else: high = mid - 1 return low
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def feasible(dist, m): pre_pos = position[0] placed = 1 for i in range(1, len(position)): if position[i] - pre_pos >= dist: placed +=1 if placed >= m: return True pre_pos = position[i] return False l = 1 r = position[-1] - position[0] while l <= r: mid = l + (r - l) // 2 if feasible(mid, m): l = mid + 1 else: r = mid - 1 return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() def count(d): ans, curr = 1, position[0] for i in range(1, n): if position[i] - curr >= d: ans += 1 curr = position[i] return ans l, r = 0, position[-1] - position[0] while l < r: mid = r - (r - l) // 2 if count(mid) >= m: l = mid else: r = mid - 1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
def possible(min_diff,arr,m): start = 0 total = 1 end = 1 while end < len(arr): if arr[end]-arr[start] >= min_diff: total += 1 start = end end += 1 if total >= m: return True return False class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() ans = -1 low = 1 high = 10**9 while low <= high: mid = (low+high)//2 if possible(mid,position,m): low = mid+1 ans = mid else: high = mid-1 return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position = sorted(position) i,j = 1,1000000001 ans = 0 while i<=j : prevCow = position[0] mid = (i+j)//2 currCows = 1 for k in range(1,len(position)) : if position[k] - prevCow >= mid : currCows += 1 prevCow = position[k] if currCows < m : j = mid - 1 else : i = mid + 1 ans = mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def valid(interval,m): last=-interval for p in position: if p-last>=interval: m-=1 last=p return True if m<=0 else False #binary search interval: return the maxiumal interval lo,hi=1,max(position)//(m-1) # the interval cannot be than the ideal condition while lo<=hi: mid=lo+(hi-lo)//2 if valid(mid,m):# the correct value can be bigger lo=mid+1#[min,lo-1] is valid all the time else: hi=mid-1#[hi+1,max] is not valid all the time # lo=hi+1; [min,lo-1] is valid, [lo,max] is not valid return hi
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position = sorted(position) def count(d): cnt = 1 cur = position[0] for p in position[1:]: if p>=cur+d: cur, cnt = p, cnt+1 return cnt l, r = 0, position[-1]-position[0] while l<r: mid = r - (r-l)//2 # count_mid = count(mid) # if count(mid) >= m: return r-l if count(mid) < m: r = mid-1 else: l = mid # print(mid, count(mid)) return r
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def checkDistance(self, position, minDist, m): lastBallPos = position[0] ballLeft = m - 1 i = 1 while i < len(position) and ballLeft != 0: if minDist <= position[i] - lastBallPos: lastBallPos = position[i] ballLeft -= 1 i += 1 return ballLeft == 0 def maxDistance(self, position: List[int], m: int) -> int: position.sort() high = position[-1] low = 1 while low < high: middle = (high + low + 1) // 2 if self.checkDistance(position, middle, m): low = middle else: high = middle - 1 return low
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def isFeasible(mid, arr, n, k): pos = arr[0] elements = 1 for i in range(1, n): if arr[i] - pos >= mid: pos = arr[i] elements += 1 if elements == k: return True return False position = sorted(position) if m == 2: return position[-1] - position[0] dist = [] for i in range(len(position) -1): dist.append(position[i+1] - position[i]) if m == len(position): return min(dist) left = 0 right = position[-1] res = 1 while left < right: mid = (left + right) // 2 if isFeasible(mid, position, len(position), m): res = max(res, mid) left = mid + 1 else: right = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: import bisect def maxDistance(self, position: List[int], m: int) -> int: l, r = 1, max(position)-min(position) if m == 2: return r position = sorted(position) def fea(D): #print(\" \",D) s = min(position) need = 1 last = 1 while(True): for i in range(last,len(position)): if position[i]>=s+D: need += 1 s = position[i] last = i break if last == len(position)-1 or position[-1]<s+D: break #print(\" \",need) return need print((fea(2))) while(l<r): mid = l+(r-l)//2 if fea(mid)<m: r = mid else: l = mid+1 return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) # distances = [i for i in range(10**9)] # distances.sort() hi = 10**9-1 li = 0 while li <= hi: # print(\"li \",li,\"hi \",hi) if li == hi: return li mid = (hi+li)//2 if hi == li+1: mid += 1 d = mid i = 0 j = 0 count = 1 flag = True while count < m: while position[j]<position[i] + d: j += 1 if j == n and count < m: flag = False break if j == n and count <m: flag = False break i = j count += 1 if hi == li+1: if flag: return hi else: return li if flag: li = mid else: hi = mid-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, arr: List[int], m: int) -> int: arr = sorted(arr) low, high = 1, arr[-1]-arr[0]+1 def isValid(k, balls): balls-=1 prev = arr[0] res = float('inf') for i in range(1,len(arr)): if arr[i]-prev >= k: res = min(res, arr[i]-prev) balls-=1 prev = arr[i] if balls == 0: break return res if balls == 0 else -1 ans = 0 while low < high: mid = low + (high-low)//2 tmp = isValid(mid, m) if tmp != -1: ans = tmp low = mid+1 else: high = mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, pos: List[int], m: int) -> int: pos = sorted(pos) def test(gap, pos = pos, m = m): cur = pos[0] i = 1 m -= 1 while i < len(pos): if pos[i] - cur >= gap: cur = pos[i] m -= 1 if m == 0: return True i += 1 return False lower, upper = 1, pos[-1]-pos[0] if test(upper): return upper while True: gap = (lower + upper) // 2 if test(gap): lower = gap else: upper = gap if upper - lower == 1: return lower
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, pos: List[int], m: int) -> int: if m < 2: return -1 pos.sort() avg = (pos[-1]-pos[0]+1)//(m-1)+1 #boolean def check(f): nonlocal pos, m cnt = 0 pidx = 0 for i in range(1, len(pos)): if (pos[i]-pos[pidx]+1) >= f: cnt += 1 pidx = i #print(\"cnt:\", cnt) return cnt >= m-1 l, r = 1, avg #print(\"l:\", l, \"r:\", r) while l+1<r: mid = l+(r-l)//2 if check(mid): l = mid else: r = mid-1 #print(\"l:\", l, \"r:\", r) if check(r): return r-1 else: return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) lo = 1 hi = position[-1] - position[0] res = 0 while lo <= hi: mid = lo + (hi - lo) // 2 count = 1 prev = position[0] for i in range(1, n): if position[i] - prev >= mid: count += 1 prev = position[i] if count >= m: res = max(res, mid) lo = mid + 1 else: hi = mid - 1 return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, pos: List[int], m: int) -> int: pos.sort() low = 0 high = pos[-1] - pos[0] def chk(d): nonlocal m n = len(pos) c = m p = 0 for i in range(n): if c == 0: return True if i == 0: c -= 1 p = pos[0] continue if pos[i] - p >= d: c -= 1 p = pos[i] return c <= 0 while low < high: mid = int( math.ceil( (low + high) / 2 ) ) if chk(mid): low = mid else: high = mid - 1 return low
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: start = 0 position.sort() end = position[-1] def good(x): s = -1e100 count = 0 for p in position: if p - s >= x: count += 1 s = p return count >= m while start < end: mid = (start + end) // 2 if good(mid + 1): start = mid + 1 else: end = mid return start
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def count(dist): prev, balls = -1e9, 0 for p in position: if p - prev >= dist: balls += 1 if balls == m: break prev = p return balls position.sort() l, r = 1, position[-1] res = 0 while l < r: mid = (l + r) // 2 balls = count(mid) if balls == m: res = mid l = mid + 1 else: r = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() if m == 2: return position[-1] - position[0] else: maxd = position[-1] // (m-1) start = 1 end = maxd while start < end: middle = (start+end) // 2 result = self.is_satisfy(position, middle, m) if result: if start == middle: result2= self.is_satisfy(position, middle+1, m) if result2: return middle + 1 else: return middle start = middle else: end = middle - 1 return start def is_satisfy(self, position, maxd, m): pre_postion = position[0] index = 1 left_count = m-1 pcount = len(position) while index < pcount: if position[index] - pre_postion < maxd: index += 1 continue left_count -= 1 if left_count == 0: return True pre_postion = position[index] index+=1 return False
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l,r = 1, position[-1] while l < r: mid = ( r + l +1 ) //2 cnter = 0 lst = - (2*mid) for i in position: if i - lst >= mid: cnter += 1 lst = i if cnter >= m: l = mid else: r = mid -1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: # [22,57,74,79] def possibleForce (self,force, position): count = 0 lastBall = 0 for i in range (0,len(position)): if (i == 0 or (position[i]- position[lastBall]) >= force): count +=1 lastBall =i return count def maxDistance(self, position: List[int], m: int) -> int: position.sort() #print(position) maxReally = (position[-1] -position[0] )/ (m-1) #print (maxReally) maxForce = maxReally minForce = 1 result = -1 while (minForce <= maxForce and minForce >0 and maxForce <= maxReally): middleForce = minForce + (maxForce - minForce) // 2 print((minForce, maxForce, middleForce)) count = self.possibleForce(middleForce, position) print (count) if count >= m: # go right minForce = middleForce + 1 result = middleForce else: # go left maxForce = middleForce - 1 return int(result ) #x o o x o o x - o x
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() result = 0 # can we place m balls each separated by x distance? def check(x) -> bool: nonlocal position, m last = position[0] placed = 1 for pos in position: if pos - last >= x: placed += 1 if placed >= m: return True last = pos return False first = 0 last = int(ceil((position[-1] - position[0])/(m-1))) while first < last: mid = (first + last + 1)//2 if check(mid): result = mid first = mid else: last = mid - 1 return first
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() left = 1 right = position[-1] - position[0] def countBalls(dist): curr, balls = position[0], 1; for i in position: if (i-curr >= dist): balls += 1 curr = i return balls while (left <= right): mid = (left + right) // 2 if (countBalls(mid) >= m): left = mid + 1 else: right = mid - 1 return right
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l = 0 r = 1 + position[-1] - position[0] while l + 1 < r: med = (l + r) // 2 cnt = 0 pre = position[0] - 2*med for x in position: if x - pre >= med: pre = x cnt += 1 if cnt >= m: l = med else: r = med return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: positions = sorted(position) l, r = 1, positions[len(position) - 1] - positions[0] while l < r: mid = math.ceil((l + r) / 2) if self.balls(positions, mid) >= m: l = mid else: r = mid - 1 return l def balls(self, positions, d): curr, ans = -10 ** 10, 0 for position in positions: if position - curr >= d: curr = position ans += 1 return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() if m==2: return position[-1]-position[0] else: l=1;r=position[-1] while l<r: mid=(l+r)//2 prev,balls=-1000000000,0 for p in position: if p-prev>=mid: balls+=1 if balls==m: break prev=p if balls==m: ans=mid l=mid+1 else: r=mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def count(dist): prev, balls = position[0], 1 for p in position[1:]: if p - prev >= dist: balls += 1 if balls == m: break prev = p return balls l, r = 1, position[-1] res = 0 while l < r: mid = (l + r) // 2 balls = count(mid) if balls == m: res = mid l = mid + 1 else: r = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
from bisect import bisect_left class Solution: def maxDistance(self, position: List[int], m: int) -> int: # log(D) * log(N) * M n = len(position) position.sort() left, right = 1, (position[-1]-position[0])//(m-1) ans = 1 while left <= right: mid = (left+right)//2 #print(left, right, mid) head = 0 remains = m-1 while remains > 0: target = position[head] + mid if target > position[-1]: break head = bisect_left(position, target, head) remains -= 1 if remains == 0: #ans = mid left = mid+1 else: right = mid-1 return right
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() def count(d): ans, curr = 1, position[0] for x in position[1:]: if x - curr >= d: ans, curr = ans+1, x return ans l, r = 1, position[-1] - position[0] + 1 while l < r: p = l + (r - l) // 2 if count(p) >= m: l = p+1 else: r = p return l-1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() if m == 2: return position[-1] - position[0] def count(dist): prev, balls = position[0], 1 for p in position[1:]: if p - prev >= dist: balls += 1 if balls == m: break prev = p return balls l, r = 1, position[-1] res = 0 while l < r: mid = (l + r) // 2 balls = count(mid) if balls == m: res = mid l = mid + 1 else: r = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: # def pd(i, m): # if m == 1: # return float(\"inf\") # if memo[i][m]: # return memo[i][m] # res = 0 # for j in range(i+1, len(position)): # res = max(res, min(position[j] - position[i], pd(j, m-1))) # memo[i][m] = res # return res # position = sorted(position) # memo = [(1 + m) * [0] for _ in range(1 + len(position))] # res = pd(0, m) position = sorted(position) if m == 2: return position[-1] - position[0] def solve(threshold, m): last_ball_pos = position[0] tot = 1 for pos in position: if pos - last_ball_pos >= threshold: tot += 1 last_ball_pos = pos return tot >= m start = 0 end = position[-1] - position[0] res = 0 while start <= end: middle = start + (end - start) // 2 if solve(middle, m): start = middle + 1 res = max(res, middle) else: end = middle - 1 return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() maxForce = (position[-1] - position[0]) // (m - 1) minForce = 1 while maxForce > minForce: maxMinForce = (maxForce + minForce + 1) // 2 #print(minForce, maxForce, maxMinForce) if self.canPut(position, m, maxMinForce): minForce = maxMinForce else: maxForce = maxMinForce - 1 return minForce def canPut(self, position: List[int], m: int, force: int) -> bool: putCnt = 0 prePos = -1 for pos in position: if prePos == -1 or pos - prePos >= force: putCnt += 1 prePos = pos if putCnt == m: return True return False
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position = sorted(position) max_possible = (position[-1] - position[0]) // (m - 1) right = max_possible left = 0 mid = max_possible // 2 while left <= right: if self.check(position, m, mid): left = mid + 1 mid = (left + right) // 2 else: right = mid - 1 mid = (left + right) // 2 return mid def check(self, position, m, force): p = 1 m -= 1 prev_pos = position[0] while p < len(position): if position[p] - prev_pos >= force: m -= 1 prev_pos = position[p] if not m: return True p += 1 return False
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() left = 1 right = position[-1] - position[0] def countBalls(dist): curr, balls = position[0], 1; for i in position: if (i-curr >= dist): balls += 1 curr = i return balls while (left <= right): mid = (left + right) // 2 if (countBalls(mid) >= m): left = mid + 1 else: right = mid - 1 return right
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l, r = 1, position[-1] - position[0] def isValid(val): ball = 1 previous = position[0] for p in position: if p - previous < val: continue ball += 1 previous = p return ball >= m while l < r: mid = l + (r - l + 1) // 2 if isValid(mid): l = mid else: r = mid - 1 return r
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() if m == 2: return position[-1] - position[0] l, r = 1, position[-1] ans = 0 while l < r: mid = (l + r) // 2 prev, balls = -1000000000, 0 for p in position: if p - prev >= mid: balls += 1 if balls == m: break prev = p if balls == m: ans = mid l = mid + 1 else: r = mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() if m == 2: return position[-1] - position[0] l, r = 1, position[-1] ans = 0 while l < r: mid = (l + r) // 2 prev, balls = -1000000000, 0 for p in position: if p - prev >= mid: balls += 1 if balls == m: break prev = p if balls == m: ans = mid l = mid + 1 else: r = mid return ans
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, a: List[int], m: int) -> int: def check(d): x, k = 0, m for i in range(len(a)): if a[i] >= x: x, k = a[i] + d, k - 1 if k == 0: break return k == 0 a.sort() l, r = 1, (max(a) - min(a)) // (m-1) while l + 1 < r: d = (l + r) // 2 if check(d): l = d else: r = d - 1 return r if check(r) else l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() res = 0 l, r = 1, (position[-1] - position[0]) // (m - 1) + 1 while l < r: mid = (l + r) // 2 prev = position[0] ball = 1 for i in position[1:]: if i - prev >= mid: ball += 1 if ball == m: break prev = i if ball == m: l = mid + 1 res = mid else: r = mid return res
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def ball_count(distance): prev,cnt=position[0],1 for pos in position[1:]: if pos-prev>=distance: cnt+=1 prev=pos return cnt position.sort() n=len(position) l,r=0,position[-1]-position[0] while l<r: mid=r-(r-l)//2 if ball_count(mid)>=m: l=mid else: r=mid-1 return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
import bisect class Solution: def maxDistance(self, position: List[int], m: int) -> int: position_set = set(position) position.sort() max_force = (position[-1] - position[0])//(m-1) min_force = 1 last_idx = len(position)-1 while min_force != max_force: mid_force = (min_force + max_force + 1) // 2 first_ball = next_ball = position[0] next_idx = 1 for _ in range(m-2): next_ball = first_ball+mid_force if next_ball not in position_set: # search the next larger next_idx = bisect.bisect_left(position, next_ball, next_idx, last_idx) next_ball = position[next_idx] if next_idx == last_idx: break next_idx += 1 first_ball = next_ball else: if position[-1] - next_ball >= mid_force: min_force = mid_force else: max_force = mid_force-1 continue max_force = mid_force-1 return min_force
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() def check(dist, m): last = position[0] for i in range(1, len(position)): if(position[i]-last >= dist): m-=1 last=position[i] return(m<=1) l=0; r=position[-1]-position[0] while(l<r): mid=l+((r-l+1)>>1) if(check(mid, m)): l=mid else: r=mid-1 return(l)
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, positions: List[int], m: int) -> int: positions.sort() def check(value) -> bool: last = positions[0] count = 1 for pos in positions: if pos-last > value: count += 1 last = pos if count >= m: return False return True left, right = 1, max(positions) while left < right: mid = left + (right - left) // 2 if check(mid): right = mid else: left = mid + 1 return left
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: #求两球之间的最小最大值 position.sort() l,r=0,position[-1]-position[0] #两球之间的距离 while l<r: mid=(l+r+1)//2 count=1 last=position[0] for a in position[1:]: if a-last>=mid: count+=1 last=a if count<m: r=mid-1 else: l=mid return l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def canPut(distance: int)->bool: count = 1 curr = position[0] for pos in position[1:]: if pos >= curr+distance: count += 1 curr = pos if count >= m: return True return False position.sort() lo, hi = 1, position[-1]-position[0] max_distance = lo while lo <= hi: mi = (lo+hi)//2 if canPut(mi): lo = mi+1 max_distance = max(max_distance, mi) else: hi = mi-1 #print(lo, hi) return max_distance
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, a: List[int], m: int) -> int: def check(d): x, k = 0, m for i in range(len(a)): if a[i] >= x: x, k = a[i] + d, k - 1 if k == 0: break return k == 0 a.sort() l, r = 1, (max(a) - min(a)) // (m-1) while l + 1 < r: d = (l + r) // 2 if check(d): l = d else: r = d - 1 return r if check(r) else l
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: def working(mid: int): prev_stall = 0 stall = 1 # print(position) for i in range(1, m): while (position[stall] - position[prev_stall]) < mid: stall+=1 if stall == len(position): return False prev_stall = stall return True L = max(position) low = 1 high = int(L/(m-1)) largest = 0 position = sorted(position) while low <= high: mid = int((low+high)/2) if working(mid): if mid < int(L/(m-1)): low = mid + 1 else: largest = max(largest, mid) break largest = max(largest, mid) elif mid > 0: high = mid - 1 return largest
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() n = len(position) left,right = 0,position[-1]-position[0] // (m-1) # search space is sorted def count_balls(force): balls,prev = 1,position[0] for cur in position[1:]: if cur-prev >= force: balls += 1 prev = cur return balls while left < right: # mid = left + (right-left)//2 mid = right - (right-left) // 2 # mid = (left+right+1)//2 if count_balls(mid) >= m: left = mid else: right = mid - 1 return left
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: left = 1 right = max(position) position.sort() while left < right: mid = left + (right - left)//2 legal = self.evaluate(position, m, mid) if legal: right = mid else: left = mid + 1 return left - 1 def evaluate(self, position, m, force): balls_placed = 0 prev_val = None for val in position: if not prev_val: prev_val = val balls_placed += 1 else: if val - prev_val >= force: balls_placed += 1 prev_val = val if balls_placed > m-1: return False return True
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
import math class Solution: def maxDistance(self, position: List[int], m: int) -> int: n = len(position) position.sort() diff = [] for i in range(n-1): diff.append(position[i+1]-position[i]) def check(force,diff,num): i = 0 j = 0 curr = 0 while i < len(diff): curr += diff[i] if curr >= force: j += 1 curr = 0 i += 1 return j >= num if m == 2: return position[n-1]-position[0] start = 1 end = math.ceil((position[n-1]-position[0])/(m-1)) mid = (start+end)//2 ansList = [] while start < end: if check(mid,diff,m-1): start = mid+1 ansList.append(mid) else: end = mid-1 mid = (start+end)//2 if check(mid,diff,m-1): ansList.append(mid) return max(ansList)
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], m: int) -> int: position.sort() l, r = 1, position[len(position) - 1] - position[0] def is_doable(gap): count, pre = 0, position[0] - 2 * gap, for element in position: if element - pre >= gap: pre = element count += 1 if count == m: return True return False while True: mid = (l + r) // 2 if is_doable(mid): if mid == position[len(position) - 1] - position[0]: return mid elif is_doable(mid + 1): l = mid + 1 else: return mid else: r = mid - 1
In universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put in his new invented basket. Rick has n empty baskets, the ith basket is at position[i], Morty has m balls and needs to distribute the balls into the baskets such that the minimum magnetic force between any two balls is maximum. Rick stated that magnetic force between two different balls at positions x and y is |x - y|. Given the integer array position and the integer m. Return the required force.   Example 1: Input: position = [1,2,3,4,7], m = 3 Output: 3 Explanation: Distributing the 3 balls into baskets 1, 4 and 7 will make the magnetic force between ball pairs [3, 3, 6]. The minimum magnetic force is 3. We cannot achieve a larger minimum magnetic force than 3. Example 2: Input: position = [5,4,3,2,1,1000000000], m = 2 Output: 999999999 Explanation: We can use baskets 1 and 1000000000.   Constraints: n == position.length 2 <= n <= 10^5 1 <= position[i] <= 10^9 All integers in position are distinct. 2 <= m <= position.length
class Solution: def maxDistance(self, position: List[int], k: int) -> int: position.sort() def check(m): prev = -1e20 c = 0 for i in position: if i - prev >= m: prev = i c+=1 return c>=k l = 0 r = max(position) while l < r: m = (l+r+1)//2 if check(m): l = m else: r = m-1 return l
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, and each matchstick must be used exactly one time. Your input will be several matchsticks the girl has, represented with their stick length. Your output will either be true or false, to represent whether you could make one square using all the matchsticks the little match girl has. Example 1: Input: [1,1,2,2,2] Output: true Explanation: You can form a square with length 2, one side of the square came two sticks with length 1. Example 2: Input: [3,3,3,3,4] Output: false Explanation: You cannot find a way to form a square with all the matchsticks. Note: The length sum of the given matchsticks is in the range of 0 to 10^9. The length of the given matchstick array will not exceed 15.
class Solution: def makesquare(self, nums): """ :type nums: List[int] :rtype: bool """ if len(nums) < 4: return False length = sum(nums) if length % 4: return False length = (int) (length / 4) nums.sort(reverse=True) #print(nums) if length < nums[0]: return False elif length == nums[0]: stack = list([(set([0]), 1, length, 1)]) else: stack = list([(set([0]), 1, length - nums[0], 2)]) # (usedIndexSet, searchStartFromIndex, target, remainRounds) while stack: usedSet, startIndex, target, remainRounds = stack.pop() #print(usedSet, set(range(0, len(nums))) - usedSet, target, remainRounds) for i in range(len(nums) - 1, startIndex - 1, -1): if i in usedSet: continue num = nums[i] if num < target and i + 1 < len(nums): stack.append((usedSet | {i}, i+1, target - num, remainRounds)) elif num == target: if remainRounds == 0: return True else: stack.append((usedSet | {i}, 1, length, remainRounds - 1)) # Else not valid path, continue return False
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, and each matchstick must be used exactly one time. Your input will be several matchsticks the girl has, represented with their stick length. Your output will either be true or false, to represent whether you could make one square using all the matchsticks the little match girl has. Example 1: Input: [1,1,2,2,2] Output: true Explanation: You can form a square with length 2, one side of the square came two sticks with length 1. Example 2: Input: [3,3,3,3,4] Output: false Explanation: You cannot find a way to form a square with all the matchsticks. Note: The length sum of the given matchsticks is in the range of 0 to 10^9. The length of the given matchstick array will not exceed 15.
class Solution: def makesquare(self, nums): """ :type nums: List[int] :rtype: bool """ # if sum(nums) % 4 != 0 or len(nums) < 4 or max(nums) > sum(nums) / 4 : # return False # nums.sort(reverse=True) # if nums[0] < sum(nums) / 4 and nums[0] + nums[-1] > sum(nums): # return False # def dfs(nums, pos, target): # if pos == len(nums): # return True # for i in range(4): # if target[i] >= nums[pos]: # target[i] -= nums[pos] # if dfs(nums, pos + 1, target): # return True # target[i] += nums[pos] # return False # return dfs(nums, 0, [sum(nums) / 4] * 4) total = sum(nums) if total%4 != 0 or len(nums)<4: return False size = total/4 nums.sort(reverse=True) used = [False]*len(nums) def dfs(i, expect): if i >= len(nums): return expect%size == 0 if used[i]: return dfs(i+1, expect) used[i] = True if nums[i] == expect: return True if nums[i] < expect: expect -= nums[i] available = [j for j in range(i+1, len(nums)) if not used[j]] for x in available: if dfs(x, expect): return True used[i] = False return False for i in range(len(nums)): if not dfs(i, size): return False return True
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, and each matchstick must be used exactly one time. Your input will be several matchsticks the girl has, represented with their stick length. Your output will either be true or false, to represent whether you could make one square using all the matchsticks the little match girl has. Example 1: Input: [1,1,2,2,2] Output: true Explanation: You can form a square with length 2, one side of the square came two sticks with length 1. Example 2: Input: [3,3,3,3,4] Output: false Explanation: You cannot find a way to form a square with all the matchsticks. Note: The length sum of the given matchsticks is in the range of 0 to 10^9. The length of the given matchstick array will not exceed 15.
class Solution: def makesquare(self, nums): """ :type nums: List[int] :rtype: bool """ def checkv(t,c,nums,used): if t==0: return True if t<0: return False while c<len(nums) and used[c]: c=c+1 if c>=len(nums): return False if checkv(t-nums[c],c+1,nums,used): used[c]=True return True if checkv(t,c+1,nums,used): return True return False edgel=sum(nums) if edgel%4!=0 or edgel==0: return False edgel=edgel/4 nums.sort(key=lambda x:-x) n=len(nums) used=[False]*n for p in range(3): t=edgel if not checkv(t,0,nums,used): return False return True
Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little match girl has, please find out a way you can make one square by using up all those matchsticks. You should not break any stick, but you can link them up, and each matchstick must be used exactly one time. Your input will be several matchsticks the girl has, represented with their stick length. Your output will either be true or false, to represent whether you could make one square using all the matchsticks the little match girl has. Example 1: Input: [1,1,2,2,2] Output: true Explanation: You can form a square with length 2, one side of the square came two sticks with length 1. Example 2: Input: [3,3,3,3,4] Output: false Explanation: You cannot find a way to form a square with all the matchsticks. Note: The length sum of the given matchsticks is in the range of 0 to 10^9. The length of the given matchstick array will not exceed 15.
class Solution: def makesquare(self, nums): s = sum(nums) if not s % 4 == 0: return False l = s // 4 from collections import Counter self.c = Counter(nums) for _ in range(4): n = self.f(0, sorted(self.c.elements(),reverse=True), l, ()) if not n: return False self.c.subtract(n) return True def f(self, index, keys, sum, nums): if sum == 0: return nums if sum < 0 or index >= len(keys): return None return self.f(index + 1, keys, sum - keys[index], (*nums, keys[index])) \ or self.f(index + 1, keys, sum, nums)
Given a rectangular cake with height h and width w, and two arrays of integers horizontalCuts and verticalCuts where horizontalCuts[i] is the distance from the top of the rectangular cake to the ith horizontal cut and similarly, verticalCuts[j] is the distance from the left of the rectangular cake to the jth vertical cut. Return the maximum area of a piece of cake after you cut at each horizontal and vertical position provided in the arrays horizontalCuts and verticalCuts. Since the answer can be a huge number, return this modulo 10^9 + 7.   Example 1: Input: h = 5, w = 4, horizontalCuts = [1,2,4], verticalCuts = [1,3] Output: 4 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green piece of cake has the maximum area. Example 2: Input: h = 5, w = 4, horizontalCuts = [3,1], verticalCuts = [1] Output: 6 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green and yellow pieces of cake have the maximum area. Example 3: Input: h = 5, w = 4, horizontalCuts = [3], verticalCuts = [3] Output: 9   Constraints: 2 <= h, w <= 10^9 1 <= horizontalCuts.length < min(h, 10^5) 1 <= verticalCuts.length < min(w, 10^5) 1 <= horizontalCuts[i] < h 1 <= verticalCuts[i] < w It is guaranteed that all elements in horizontalCuts are distinct. It is guaranteed that all elements in verticalCuts are distinct.
class Solution: def maxArea(self, h: int, w: int, horizontalCuts: List[int], verticalCuts: List[int]) -> int: mod = int(1e9)+7 return ( ( self.getMax(horizontalCuts, h) % mod ) * ( self.getMax(verticalCuts, w) % mod ) ) % mod def getMax(self, cuts, size): if len(cuts) == 1: return max(cuts[0], size - cuts[0]) cuts.sort() max_cut_size = max(cuts[0], size - cuts[-1]) for index in range(1, len(cuts)): if cuts[index] - cuts[index - 1] > max_cut_size: max_cut_size = cuts[index] - cuts[index - 1] return max_cut_size
Given a rectangular cake with height h and width w, and two arrays of integers horizontalCuts and verticalCuts where horizontalCuts[i] is the distance from the top of the rectangular cake to the ith horizontal cut and similarly, verticalCuts[j] is the distance from the left of the rectangular cake to the jth vertical cut. Return the maximum area of a piece of cake after you cut at each horizontal and vertical position provided in the arrays horizontalCuts and verticalCuts. Since the answer can be a huge number, return this modulo 10^9 + 7.   Example 1: Input: h = 5, w = 4, horizontalCuts = [1,2,4], verticalCuts = [1,3] Output: 4 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green piece of cake has the maximum area. Example 2: Input: h = 5, w = 4, horizontalCuts = [3,1], verticalCuts = [1] Output: 6 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green and yellow pieces of cake have the maximum area. Example 3: Input: h = 5, w = 4, horizontalCuts = [3], verticalCuts = [3] Output: 9   Constraints: 2 <= h, w <= 10^9 1 <= horizontalCuts.length < min(h, 10^5) 1 <= verticalCuts.length < min(w, 10^5) 1 <= horizontalCuts[i] < h 1 <= verticalCuts[i] < w It is guaranteed that all elements in horizontalCuts are distinct. It is guaranteed that all elements in verticalCuts are distinct.
class Solution: def maxArea(self, h: int, w: int, horizontalCuts: List[int], verticalCuts: List[int]) -> int: h_max = self.get_max_interval(w, sorted(verticalCuts)) w_max = self.get_max_interval(h, sorted(horizontalCuts)) return (h_max*w_max) % (10**9 + 7) def get_max_interval(self, length, cuts): current = 0 max_cut = 0 for cut in cuts: max_cut = max(max_cut, cut - current) current = cut max_cut = max(max_cut, length - current) return max_cut
Given a rectangular cake with height h and width w, and two arrays of integers horizontalCuts and verticalCuts where horizontalCuts[i] is the distance from the top of the rectangular cake to the ith horizontal cut and similarly, verticalCuts[j] is the distance from the left of the rectangular cake to the jth vertical cut. Return the maximum area of a piece of cake after you cut at each horizontal and vertical position provided in the arrays horizontalCuts and verticalCuts. Since the answer can be a huge number, return this modulo 10^9 + 7.   Example 1: Input: h = 5, w = 4, horizontalCuts = [1,2,4], verticalCuts = [1,3] Output: 4 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green piece of cake has the maximum area. Example 2: Input: h = 5, w = 4, horizontalCuts = [3,1], verticalCuts = [1] Output: 6 Explanation: The figure above represents the given rectangular cake. Red lines are the horizontal and vertical cuts. After you cut the cake, the green and yellow pieces of cake have the maximum area. Example 3: Input: h = 5, w = 4, horizontalCuts = [3], verticalCuts = [3] Output: 9   Constraints: 2 <= h, w <= 10^9 1 <= horizontalCuts.length < min(h, 10^5) 1 <= verticalCuts.length < min(w, 10^5) 1 <= horizontalCuts[i] < h 1 <= verticalCuts[i] < w It is guaranteed that all elements in horizontalCuts are distinct. It is guaranteed that all elements in verticalCuts are distinct.
class Solution: def maxArea(self, h: int, w: int, horizontalCuts: List[int], verticalCuts: List[int]) -> int: horizontalCuts.sort() verticalCuts.sort() def getGap(arr, n): prev=0 i=0 res=0 while i<len(arr): res=max(arr[i]-prev, res) prev=arr[i] i+=1 return max(n-prev, res) return (getGap(horizontalCuts, h)*getGap(verticalCuts, w))%(10**9 + 7)