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Provide a correct Python 3 solution for this coding contest problem. Takahashi is distributing N balls to K persons. If each person has to receive at least one ball, what is the maximum possible difference in the number of balls received between the person with the most balls and the person with the fewest balls? Constraints * 1 \leq K \leq N \leq 100 * All values in input are integers. Input Input is given from Standard Input in the following format: N K Output Print the maximum possible difference in the number of balls received. Examples Input 3 2 Output 1 Input 3 1 Output 0 Input 8 5 Output 3
instruction
0
88,181
5
176,362
"Correct Solution: ``` N,K = [int(x) for x in input().split()] print(N%K) ```
output
1
88,181
5
176,363
Provide a correct Python 3 solution for this coding contest problem. Takahashi is distributing N balls to K persons. If each person has to receive at least one ball, what is the maximum possible difference in the number of balls received between the person with the most balls and the person with the fewest balls? Constraints * 1 \leq K \leq N \leq 100 * All values in input are integers. Input Input is given from Standard Input in the following format: N K Output Print the maximum possible difference in the number of balls received. Examples Input 3 2 Output 1 Input 3 1 Output 0 Input 8 5 Output 3
instruction
0
88,182
5
176,364
"Correct Solution: ``` n, k = list(map(int, input().split())) if k == 1: print(0) exit() print(n - k) ```
output
1
88,182
5
176,365
Provide a correct Python 3 solution for this coding contest problem. Takahashi is distributing N balls to K persons. If each person has to receive at least one ball, what is the maximum possible difference in the number of balls received between the person with the most balls and the person with the fewest balls? Constraints * 1 \leq K \leq N \leq 100 * All values in input are integers. Input Input is given from Standard Input in the following format: N K Output Print the maximum possible difference in the number of balls received. Examples Input 3 2 Output 1 Input 3 1 Output 0 Input 8 5 Output 3
instruction
0
88,183
5
176,366
"Correct Solution: ``` a,b=map(int,input().split()) if b<2: print(0) else: print(a-b) ```
output
1
88,183
5
176,367
Provide a correct Python 3 solution for this coding contest problem. Takahashi is distributing N balls to K persons. If each person has to receive at least one ball, what is the maximum possible difference in the number of balls received between the person with the most balls and the person with the fewest balls? Constraints * 1 \leq K \leq N \leq 100 * All values in input are integers. Input Input is given from Standard Input in the following format: N K Output Print the maximum possible difference in the number of balls received. Examples Input 3 2 Output 1 Input 3 1 Output 0 Input 8 5 Output 3
instruction
0
88,184
5
176,368
"Correct Solution: ``` n,k=map(int,input().split()) if k==1: print(0) else: n=n-k print(n) ```
output
1
88,184
5
176,369
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Takahashi is distributing N balls to K persons. If each person has to receive at least one ball, what is the maximum possible difference in the number of balls received between the person with the most balls and the person with the fewest balls? Constraints * 1 \leq K \leq N \leq 100 * All values in input are integers. Input Input is given from Standard Input in the following format: N K Output Print the maximum possible difference in the number of balls received. Examples Input 3 2 Output 1 Input 3 1 Output 0 Input 8 5 Output 3 Submitted Solution: ``` N,K=map(int,input().split()) if N==K: print(1) elif K==1: print(0) else: print(N-K) ```
instruction
0
88,189
5
176,378
No
output
1
88,189
5
176,379
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,230
5
176,460
"Correct Solution: ``` print('Yes' if '9' in str(input()) else 'No') ```
output
1
88,230
5
176,461
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,231
5
176,462
"Correct Solution: ``` n=list(str(input())) print("Yes" if "9" in n else "No") ```
output
1
88,231
5
176,463
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,232
5
176,464
"Correct Solution: ``` print('Yes' if input().count('9') else 'No') ```
output
1
88,232
5
176,465
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,233
5
176,466
"Correct Solution: ``` print('YNeos'[input().find('9')==-1::2]) ```
output
1
88,233
5
176,467
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,234
5
176,468
"Correct Solution: ``` a = input() print(['No','Yes']['9' in a]) ```
output
1
88,234
5
176,469
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,235
5
176,470
"Correct Solution: ``` a=input() print('Yes' if a[0]=='9' or a[1]=='9' else 'No') ```
output
1
88,235
5
176,471
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,236
5
176,472
"Correct Solution: ``` print("YNeos"[not'9'in(input())::2]) ```
output
1
88,236
5
176,473
Provide a correct Python 3 solution for this coding contest problem. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes
instruction
0
88,237
5
176,474
"Correct Solution: ``` N = input() print('Yes' if N.find('9') != -1 else 'No') ```
output
1
88,237
5
176,475
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` print("Yes") if "9" in list(input()) else print("No") ```
instruction
0
88,238
5
176,476
Yes
output
1
88,238
5
176,477
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` print("Yes" if input().count("9") >= 1 else "No") ```
instruction
0
88,239
5
176,478
Yes
output
1
88,239
5
176,479
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` N = input() print("Yes" if N.count("9") != 0 else "No") ```
instruction
0
88,240
5
176,480
Yes
output
1
88,240
5
176,481
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` n = input() print('Yes' if '9' in set(n) else 'No') ```
instruction
0
88,241
5
176,482
Yes
output
1
88,241
5
176,483
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` print(5) ```
instruction
0
88,242
5
176,484
No
output
1
88,242
5
176,485
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` N = int(input()) print("Yes" if N % 10 == 9 or N // 10 % 9 else "No") ```
instruction
0
88,243
5
176,486
No
output
1
88,243
5
176,487
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` n = list(input()) print('YES' if '9' in n else 'NO') ```
instruction
0
88,244
5
176,488
No
output
1
88,244
5
176,489
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. It is September 9 in Japan now. You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N? Constraints * 10≤N≤99 Input Input is given from Standard Input in the following format: N Output If 9 is contained in the decimal notation of N, print `Yes`; if not, print `No`. Examples Input 29 Output Yes Input 72 Output No Input 91 Output Yes Submitted Solution: ``` from scipy.sparse import* (N,M,R),r,*t=[map(int,i.split())for i in __import__("sys").stdin] a,b,c=zip(*t) l=csgraph.dijkstra(csr_matrix((c,(a,b)),[N+1]*2),0) print(min(sum(int(l[i][j])for i,j in zip(a[:-1],a[1:]))for a in __import__("itertools").permutations(r))) ```
instruction
0
88,245
5
176,490
No
output
1
88,245
5
176,491
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,246
5
176,492
"Correct Solution: ``` import math #import numpy as np import queue from collections import deque,defaultdict import heapq as hpq from sys import stdin,setrecursionlimit #from scipy.sparse.csgraph import dijkstra #from scipy.sparse import csr_matrix ipt = stdin.readline setrecursionlimit(10**7) def main(): n = int(ipt()) mod = 10**9+7 a = [n,n*n%mod] sa = [0,0] for i in range(2,n): a.append((a[-1]+sa[-1]+(n-i+1)*n%mod)%mod) sa.append((sa[-1]+a[i-2]+n-1)%mod) print(a[-1]) return if __name__ == '__main__': main() ```
output
1
88,246
5
176,493
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,247
5
176,494
"Correct Solution: ``` def main(): mod = 10**9+7 n = int(input()) a, b, c, p = 1, 1, n, n-1 for i in range(n-1): p = (p+a-1) % mod a, b, c = b, c, ((n-1)*(n-1)+p+c) % mod print(c) main() ```
output
1
88,247
5
176,495
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,248
5
176,496
"Correct Solution: ``` P = 10 ** 9 + 7 N = int(input()) k = (N-1) ** 2 % P + 2 a, b, c = 1, 0, 0 ans = 0 for i in range(N-1): ans += a * (k + min(i, N-3)) ans %= P a, b, c = a + b, b + c, a if a >= P: a -= P if b >= P: b -= P ans += N * a ans %= P print(ans) ```
output
1
88,248
5
176,497
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,249
5
176,498
"Correct Solution: ``` N=int(input()) mod=10**9+7 DP=[0]*(N*2+5) X=[0]*(N*2+5) Y=[0]*(N*2+5) C=0 Y[0]=-1 for i in range(N): C=(C+X[i])%mod DP[i]=(C-Y[i])%mod Y[i+2]=DP[i] X[i+1]=(X[i+1]+DP[i])%mod X[i+N+2]=(X[i+N+2]-DP[i])%mod for i in range(N,N*2+2): C=(C+X[i])%mod DP[i]=(C-Y[i])%mod P=sum(DP[N:]) for i in range(N-1): P=(P+DP[i]*(N-1)*(N-1))%mod print(P) ```
output
1
88,249
5
176,499
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,250
5
176,500
"Correct Solution: ``` n = int(input()) dp = [0] * (n+1) mod = 10**9+7 dp[0] = n dp[1] = n*n SUM = n+n*n for i in range(2,n): dp[i] = (n-1)*(n-1) + n-i+1+SUM-dp[i-2] dp[i] %= mod SUM += dp[i] SUM %= mod print(dp[n-1]) ```
output
1
88,250
5
176,501
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,251
5
176,502
"Correct Solution: ``` MOD = 10 ** 9 + 7 n = int(input()) if n == 1: print(1) exit() dp = [0] * (n) dp[0] = 1 dp[1] = 1 dpsum = 2 for l in range(2, n): dp[l] = dpsum dp[l] -= dp[l-2] dp[l] %= MOD dpsum += dp[l] dpsum %= MOD ans = 1 + (dpsum - dp[-1]) * (n-1) # end with "1..." ans %= MOD for l in range(n-1): ans += dp[l] * (n - 1) ** 2 ans %= MOD ans += dp[n-1] * (n - 1) ans %= MOD print(ans) ```
output
1
88,251
5
176,503
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,252
5
176,504
"Correct Solution: ``` import sys mod = 10**9 + 7 def solve(): n = int(input()) if n == 1: print(1) return dp = [0] * (n + 1) dp[1] = n % mod dp[2] = n**2 % mod acc = [0] * (n + 1) acc[1] = dp[1] % mod acc[2] = (dp[1] + dp[2]) % mod for k in range(3, n + 1): dp[k] = (dp[k - 1] + (n - 1)**2 + acc[k - 3] + n - k + 2) % mod acc[k] = (acc[k - 1] + dp[k]) % mod ans = dp[n] print(ans) def debug(x, table): for name, val in table.items(): if x is val: print('DEBUG:{} -> {}'.format(name, val), file=sys.stderr) return None if __name__ == '__main__': solve() ```
output
1
88,252
5
176,505
Provide a correct Python 3 solution for this coding contest problem. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283
instruction
0
88,253
5
176,506
"Correct Solution: ``` n = int(input()) if n == 1: print(1) else: res_v = [0]*(n + 1) res_v_cumsum = [0]*(n + 1) res_v[0] = 0 res_v[1] = 1 res_v[2] = 1 res_v_cumsum[0] = 0 res_v_cumsum[1] = 1 res_v_cumsum[2] = 2 M = 1000000007 for k in range(3, n): res_v[k] = (1 + res_v_cumsum[k-1] - res_v[k-2]) % M res_v_cumsum[k] = (res_v_cumsum[k-1] + res_v[k]) % M #print(res_v) print((((res_v_cumsum[n-2] * (((n-1) * (n-1)) % M)) % M) + ((res_v_cumsum[n-1] * (n-1)) % M) + n + (n-1)*(n-1)%M) % M) ```
output
1
88,253
5
176,507
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` MOD = 10 ** 9 + 7 n = int(input()) """ dp = [-1] * (n + 1) dp[0] = 1 def cnt(num): ans = 0 if num < 0: return 1 if dp[num] != -1: return dp[num] if num == 1: dp[num] = n return n for i in range(n): if i == 0: ans += cnt(num - 1) ans %= MOD else: if num - 2 - i < 0: ans += 1 else: ans += cnt(num - 2 - i) ans += n - 1 ans %= MOD dp[num] = ans return ans dp[0] = 1 print(cnt(n)) """ dq = [0] * (n + 1) sum_ = [0] * (n + 1) dq[0] = 1 sum_[0] = 1 for i in range(n): if i == 0: dq[i + 1] = n sum_[i + 1] = sum_[i] + dq[i + 1] continue """ for j in range(n): if j == 0: dq[i + 1] += dq[i] else: if i - 1 - j < 0: dq[i + 1] += 1 else: dq[i + 1] += dq[i - 1 - j] dq[i + 1] += n - 1 """ dq[i + 1] += dq[i] dq[i + 1] += (n - 1) * (n - 1) dq[i + 1] += sum_[i - 2] dq[i + 1] += abs(i - n) dq[i + 1] %= MOD sum_[i + 1] = sum_[i] + dq[i + 1] sum_[i + 1] %= MOD print(dq[-1]) ```
instruction
0
88,254
5
176,508
Yes
output
1
88,254
5
176,509
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` # dp[i] := i 項目以降を見たときの場合の数 # = dp[i+1] + (Σ_{3<=d<=N-1} dp[i+d]) + (n-1)**2 # i 項目と i+1 項目について、 # (1) i 項目が 1 の場合 # (2) i 項目が 1 で無く、i+1 項目が 1 の場合 # (3) i 項目も i+1 項目も 1 で無い場合 # で場合分けしてそれぞれを足している # これを累積和で高速化する # 初期化がややこしい N = int(input()) mod = 10**9+7 dp = [0] * N dp[N-1] = N dp[N-2] = N*N c = N * (N+1) + N-1 const = (N-1)**2 for i in range(N-3, -1, -1): ans = c - dp[i+2] + const dp[i] = ans c = (c + ans - 1) % mod print(dp[0]%mod) ```
instruction
0
88,255
5
176,510
Yes
output
1
88,255
5
176,511
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` n=int(input()) if n==1: print(1) exit() mod=10**9+7 dp=[0]*(n+1) S=[0]*(n+1) dp[0]=1 dp[1]=1 dp[2]=1 S[0]=1 for i in range(n): if i+1>=3: dp[i+1]=2*dp[i]-dp[i-1]+dp[i-2] dp[i+1]%=mod S[i+1]=S[i]+(n-1)*dp[i] S[i+1]%=mod ans=S[n] for i in range(1,n): ans+=((n-1)**2)*dp[i-1] ans%=mod print(ans) #print(S) #print(dp) ```
instruction
0
88,256
5
176,512
Yes
output
1
88,256
5
176,513
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` n=int(input());a,b,c,p=1,1,n,n-1 for i in range(n-1): p+=a-1;a,b,c=b,c,((n-1)**2+p+c)%(10**9+7) print(c) ```
instruction
0
88,257
5
176,514
Yes
output
1
88,257
5
176,515
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` INF=10**9+7 N=int(input()) a=[0 for i in range(N)] a[0]=1 for i in range(N): a[i]=sum(a)%INF print(a[n]%INF) ```
instruction
0
88,258
5
176,516
No
output
1
88,258
5
176,517
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` import numpy as np n = int(input()) if n == 1: print(1) else: res_v = np.zeros(n + 1, dtype='int64') res_v_cumsum = np.zeros(n + 1, dtype='int64') res_v[0] = 0 res_v[1] = 1 res_v[2] = 1 res_v_cumsum[0] = 0 res_v_cumsum[1] = 1 res_v_cumsum[2] = 2 M = 1000000007 for k in range(3, n): res_v[k] = (1 + res_v_cumsum[k-1] - res_v[k-2]) % M res_v_cumsum[k] = (res_v_cumsum[k-1] + res_v[k]) % M print((((res_v_cumsum[n-2] * (((n-1) * (n-1)) % M)) % M) + ((res_v_cumsum[n-1] * (n-1)) % M) + n + (n-1)*(n-1)%M) % M) ```
instruction
0
88,259
5
176,518
No
output
1
88,259
5
176,519
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` #!/usr/bin/env python3 # -*- coding: utf-8 -*- from random import * def readln(): _res = list(map(int,str(input()).split(' '))) return _res p = 1000000000 + 7 n = readln()[0] f = [0 for i in range(0,n+1)] f[1] = n f[2] = n * n s = f[:] s[2] = f[1] + f[2] for i in range(3,n+1): f[i] = f[i-1] + (n - 1) * (n - 1) f[i] = f[i] + s[i - 3] + (n - i + 2) f[i] = f[i] % p s[i] = s[i - 1] + f[i] s[i] = s[i] % p print(f[n]) ```
instruction
0
88,260
5
176,520
No
output
1
88,260
5
176,521
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. How many infinite sequences a_1, a_2, ... consisting of {{1, ... ,n}} satisfy the following conditions? * The n-th and subsequent elements are all equal. That is, if n \leq i,j, a_i = a_j. * For every integer i, the a_i elements immediately following the i-th element are all equal. That is, if i < j < k\leq i+a_i, a_j = a_k. Find the count modulo 10^9+7. Constraints * 1 \leq n \leq 10^6 Input Input is given from Standard Input in the following format: n Output Print how many sequences satisfy the conditions, modulo 10^9+7. Examples Input 2 Output 4 Input 654321 Output 968545283 Submitted Solution: ``` import sys input = sys.stdin.readline MOD = 10**9 + 7 N = int(input()) dp = [0] * (N+10) dp_cum = [0] * (N+10) dp[1] = N-1; dp_cum[1] = N-1 dp[2] = N-1; dp_cum[2] = 2*(N-1) for n in range(3,N+1): dp[n] = dp[n-1] + dp_cum[n-3] dp_cum[n] = (dp_cum[n-1] + dp[n]) % MOD answer = sum(dp[1:N])*N + dp[-1] + 1 answer %= MOD print(answer) ```
instruction
0
88,261
5
176,522
No
output
1
88,261
5
176,523
Provide a correct Python 3 solution for this coding contest problem. Example Input 3 y 7 y 6 n 5 Output 1
instruction
0
88,308
5
176,616
"Correct Solution: ``` import sys readline = sys.stdin.readline write = sys.stdout.write def solve(): N = int(readline()) L = [0]*N; D = [0]*N for i in range(N): l, d = readline().split() L[i] = +(l == 'y') D[i] = int(d) ans = 0 *I, = range(N) I.sort(key = D.__getitem__) U = [0]*N for i in I: if not L[i] or U[i]: continue d = D[i] U[i] = 1 ans += 1 k = i-1 while k >= 0 and (L[k] or D[k] < d): if L[k]: U[k] = 1 k -= 1 k = i+1 while k < N and (L[k] or D[k] < d): if L[k]: U[k] = 1 k += 1 write("%d\n" % ans) solve() ```
output
1
88,308
5
176,617
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You have $N$ items that you want to put them into a knapsack of capacity $W$. Item $i$ ($1 \le i \le N$) has weight $w_i$ and value $v_i$ for the weight. When you put some items into the knapsack, the following conditions must be satisfied: * The total value of the items is as large as possible. * The total weight of the selected items is at most $W$. * You can break some items if you want. If you put $w'$($0 \le w' \le w_i$) of item $i$, its value becomes $\displaystyle v_i \times \frac{w'}{w_i}.$ Find the maximum total value of items in the knapsack. Constraints * $1 \le N \le 10^5$ * $1 \le W \le 10^9$ * $1 \le v_i \le 10^9 (1 \le i \le N)$ * $1 \le w_i \le 10^9 (1 \le i \le N)$ Input $N$ $W$ $v_1$ $w_1$ $v_2$ $w_2$ : $v_N$ $w_N$ The first line consists of the integers $N$ and $W$. In the following $N$ lines, the value and weight of the $i$-th item are given. Output Print the maximum total value of the items in a line. The output must not contain an error greater than $10^{-6}$. Examples Input 3 50 60 10 100 20 120 30 Output 240 Input 3 50 60 13 100 23 120 33 Output 210.90909091 Input 1 100 100000 100000 Output 100 Submitted Solution: ``` n , w = map(int, input().split()) val_w = [] for i in range(n): a , b = map(int, input().split()) val_w += [(-a/b, b)] val_w.sort() Sum = 0 i = 0 while w and i <= n-1: wei = min(w, val_w[i][1]) Sum += (-val_w[i][0])*wei w -= wei i += 1 print(Sum) ```
instruction
0
88,321
5
176,642
Yes
output
1
88,321
5
176,643
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,094
5
178,188
"Correct Solution: ``` a=int("".join(list(input().split()))) print("YES" if a%4==0 else "NO") ```
output
1
89,094
5
178,189
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,095
5
178,190
"Correct Solution: ``` print('NO' if int(input().replace(' ',''))%4 else 'YES') ```
output
1
89,095
5
178,191
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,096
5
178,192
"Correct Solution: ``` n = list(input().split()) print("YES" if int("".join(n))%4==0 else "NO") ```
output
1
89,096
5
178,193
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,097
5
178,194
"Correct Solution: ``` x = input().split() print('YES' if int("".join(x)) % 4 == 0 else'NO') ```
output
1
89,097
5
178,195
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,098
5
178,196
"Correct Solution: ``` print("YES" if int("".join(list(input().split()))) % 4 == 0 else "NO") ```
output
1
89,098
5
178,197
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,099
5
178,198
"Correct Solution: ``` print('YNEOS'[(int(input()[::2]))%4>0::2]) ```
output
1
89,099
5
178,199
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,100
5
178,200
"Correct Solution: ``` print('YNEOS'[int(''.join(input().split()))%4!=0::2]) ```
output
1
89,100
5
178,201
Provide a correct Python 3 solution for this coding contest problem. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO
instruction
0
89,101
5
178,202
"Correct Solution: ``` X, A, B = map(int, input().split()) print(["NO", "YES"][(A*10+B)%4==0]) ```
output
1
89,101
5
178,203
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO Submitted Solution: ``` a = int("".join(input().split())) print("YES" if a % 4 == 0 else "NO") ```
instruction
0
89,102
5
178,204
Yes
output
1
89,102
5
178,205
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO Submitted Solution: ``` N = input().split() print(["YES", "NO"][not(int("".join(N))%4==0)]) ```
instruction
0
89,103
5
178,206
Yes
output
1
89,103
5
178,207
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. AtCoDeer has three cards, one red, one green and one blue. An integer between 1 and 9 (inclusive) is written on each card: r on the red card, g on the green card and b on the blue card. We will arrange the cards in the order red, green and blue from left to right, and read them as a three-digit integer. Is this integer a multiple of 4? Constraints * 1 ≤ r, g, b ≤ 9 Input Input is given from Standard Input in the following format: r g b Output If the three-digit integer is a multiple of 4, print `YES` (case-sensitive); otherwise, print `NO`. Examples Input 4 3 2 Output YES Input 2 3 4 Output NO Submitted Solution: ``` print('YES' if int(''.join(input().split()[1:]))%4==0 else 'NO') ```
instruction
0
89,104
5
178,208
Yes
output
1
89,104
5
178,209