message stringlengths 2 23.8k | message_type stringclasses 2 values | message_id int64 0 1 | conversation_id int64 97 109k | cluster float64 0 0 | __index_level_0__ int64 194 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves. | instruction | 0 | 22,849 | 0 | 45,698 |
Tags: implementation
Correct Solution:
```
n = int(input())
s = list(input())
t = list(input())
k = n
i = 0
ans=0
c=[]
while n!=0:
if s[i]!=t[i]:
j=i
while j<k and s[j]!=t[i]:
j+=1
if j==k:
ans=-1
break
save=s[j]
del s[j]
while j != i:
c+=[j]
j-=1
ans+=1
s.insert(i, save)
i+=1
n-=1
print(ans)
if ans > 0:
print(' '.join(map(str, c)))
``` | output | 1 | 22,849 | 0 | 45,699 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n = int(input())
s = input()
t = input()
f = False
c = 0
l = []
for i in range(n-1):
if s[i] != t[i]:
try:
ia = s[i:].index(t[i])+i
while s[i] != t[i]:
s = s[:ia-1]+s[ia-1:ia+1][::-1]+s[ia+1:]
l.append(ia)
ia -= 1
c += 1
except:
f = True
break
if c > 10000 or f or s[-1] != t[-1]:
print(-1)
else:
print(c)
print(*l)
``` | instruction | 0 | 22,850 | 0 | 45,700 |
Yes | output | 1 | 22,850 | 0 | 45,701 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n = int(input())
s = list(input())
t = list(input())
if sorted(s) != sorted(t):
print(-1)
else:
t_used = []
s_ind = []
for i in range(n):
for j in range(n):
if s[i] == t[j] and j not in t_used:
s_ind.append(j)
t_used.append(j)
break
ans = []
while s_ind != list(range(n)):
for i in range(n - 1):
if s_ind[i] > s_ind[i + 1]:
s_ind[i], s_ind[i + 1] = s_ind[i + 1], s_ind[i]
ans.append(str(i + 1))
print(len(ans))
print(" ".join(ans))
``` | instruction | 0 | 22,851 | 0 | 45,702 |
Yes | output | 1 | 22,851 | 0 | 45,703 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n = int(input())
s = input()
t = input()
sets = sorted(list(s))
sett = sorted(list(t))
ans = []
if sets != sett:
print(-1)
else:
for i in range(n):
if s[i] == t[i]:
continue
else:
sf = s.rfind(t[i])
s = s[:i] + s[sf] + s[i:sf]+s[sf+1:]
for j in range(sf-1,i-1,-1):
ans.append(j+1)
# print(s)
print(len(ans))
for j in ans:
print(j,end=" ")
``` | instruction | 0 | 22,852 | 0 | 45,704 |
Yes | output | 1 | 22,852 | 0 | 45,705 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
io = input()
s = input()
t = input()
n = len(s)
arr = []
def setChar(str, i, char):
return str[:i] + char + str[i+1:]
def swapChar(str, i):
global arr
arr.append(i + 1)
char = str[i]
str = setChar(str, i, str[i + 1])
return setChar(str, i+1, char)
def getCharPos(str, char, i):
global n
for j in range(n - i):
if (str[j + i] == char):
return j + i
print(-1)
exit()
for i in range(n):
charPos = getCharPos(s, t[i], i)
for j in range(charPos - i):
s = swapChar(s,charPos - j - 1)
print(len(arr))
print(" ".join(map(str, arr)))
``` | instruction | 0 | 22,853 | 0 | 45,706 |
Yes | output | 1 | 22,853 | 0 | 45,707 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
print(4)
print("3 4 5 4")
print(-1)
``` | instruction | 0 | 22,854 | 0 | 45,708 |
No | output | 1 | 22,854 | 0 | 45,709 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n=int(input())
s=list(input())
t=list(input())
s1=[]
t1=[]
for i in s:
s1.append(i)
for i in t:
t1.append(i)
s1.sort()
t1.sort()
count=0
ans=[]
if s1!=t1:
print (-1)
exit(0)
else:
for i in range(n):
a=t[i]
for j in range(i,n):
if (s[j]==a):
for u in range(j-1,i-1,-1):
s[u],s[u+1]=s[u+1],s[u]
ans.append(u)
count=count+1
break
print (count)
for i in ans:
print (i,end=" ")
``` | instruction | 0 | 22,855 | 0 | 45,710 |
No | output | 1 | 22,855 | 0 | 45,711 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n = int(input())
string_s = list(input())
string_t = list(input())
def switch(string_list, i):
a = string_list[i]
b = string_list[i + 1]
string_list[i] = b
string_list[i + 1] = a
return string_list
def last_switch(string_list, i):
a = string_list[i]
b = string_list[i - 1]
string_list[i] = b
string_list[i - 1] = a
return string_list
indicies = []
move = 0
revd = True
string_s = list(reversed(string_s))
string_t = list(reversed(string_t))
if sorted(string_t) != sorted(string_s):
indicies.append(-1)
else:
while string_t != string_s:
string_s = list(reversed(string_s))
string_t = list(reversed(string_t))
revd = not revd
for i in range(len(string_s) - 1):
if i == len(string_s) - 1:
string_s = last_switch(string_s, i)
elif string_s[i] != string_t[i]:
string_s = switch(string_s, i)
if not revd:
indicies.append(i + 1)
else:
indicies.append(len(string_s) - (i + 1))
# print("".join(string_s))
if len(indicies) == 0:
print(-1)
elif indicies[0] == -1:
print(-1)
else:
print(len(indicies))
print(" ".join(list(map(str, indicies))))
``` | instruction | 0 | 22,856 | 0 | 45,712 |
No | output | 1 | 22,856 | 0 | 45,713 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given two strings s and t. Both strings have length n and consist of lowercase Latin letters. The characters in the strings are numbered from 1 to n.
You can successively perform the following move any number of times (possibly, zero):
* swap any two adjacent (neighboring) characters of s (i.e. for any i = \{1, 2, ..., n - 1\} you can swap s_i and s_{i + 1}).
You can't apply a move to the string t. The moves are applied to the string s one after another.
Your task is to obtain the string t from the string s. Find any way to do it with at most 10^4 such moves.
You do not have to minimize the number of moves, just find any sequence of moves of length 10^4 or less to transform s into t.
Input
The first line of the input contains one integer n (1 β€ n β€ 50) β the length of strings s and t.
The second line of the input contains the string s consisting of n lowercase Latin letters.
The third line of the input contains the string t consisting of n lowercase Latin letters.
Output
If it is impossible to obtain the string t using moves, print "-1".
Otherwise in the first line print one integer k β the number of moves to transform s to t. Note that k must be an integer number between 0 and 10^4 inclusive.
In the second line print k integers c_j (1 β€ c_j < n), where c_j means that on the j-th move you swap characters s_{c_j} and s_{c_j + 1}.
If you do not need to apply any moves, print a single integer 0 in the first line and either leave the second line empty or do not print it at all.
Examples
Input
6
abcdef
abdfec
Output
4
3 5 4 5
Input
4
abcd
accd
Output
-1
Note
In the first example the string s changes as follows: "abcdef" β "abdcef" β "abdcfe" β "abdfce" β "abdfec".
In the second example there is no way to transform the string s into the string t through any allowed moves.
Submitted Solution:
```
n = int(input())
s = input()
t = input()
t = list(t)
s = list(s)
ss = set()
st = set()
res = []
if s == t:
print(0)
exit(0)
for i in range(n):
ss.add(s[i])
st.add(t[i])
if ss != st:
print(-1)
exit(0)
for i in range(n):
if t[i] != s[i]:
ind = s.index(t[i])
j = ind
g = ind + 1
while t[i] != s[i]:
j -= 1
g -= 1
res += [g]
per = s[g]
s[g] = s[j]
s[j] = per
print(len(res))
for i in range(len(res)):
print(res[i], end = ' ')
``` | instruction | 0 | 22,857 | 0 | 45,714 |
No | output | 1 | 22,857 | 0 | 45,715 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a binary string s.
Find the number of distinct cyclical binary strings of length n which contain s as a substring.
The cyclical string t contains s as a substring if there is some cyclical shift of string t, such that s is a substring of this cyclical shift of t.
For example, the cyclical string "000111" contains substrings "001", "01110" and "10", but doesn't contain "0110" and "10110".
Two cyclical strings are called different if they differ from each other as strings. For example, two different strings, which differ from each other by a cyclical shift, are still considered different cyclical strings.
Input
The first line contains a single integer n (1 β€ n β€ 40) β the length of the target string t.
The next line contains the string s (1 β€ |s| β€ n) β the string which must be a substring of cyclical string t. String s contains only characters '0' and '1'.
Output
Print the only integer β the number of distinct cyclical binary strings t, which contain s as a substring.
Examples
Input
2
0
Output
3
Input
4
1010
Output
2
Input
20
10101010101010
Output
962
Note
In the first example, there are three cyclical strings, which contain "0" β "00", "01" and "10".
In the second example, there are only two such strings β "1010", "0101". | instruction | 0 | 22,858 | 0 | 45,716 |
Tags: dp, strings
Correct Solution:
```
n=int(input())
s=[c=='1' for c in input()]
m=len(s)
z=[[0,0]]
for c in s:
ind = z[-1][c]
z[-1][c] = len(z)
z.append(z[ind][:])
assert(len(z) == m+1)
z[m][0] = z[m][1] = m # make it sticky
# how many things match directly
dp = [0 for _ in range(m+1)]
dp[0] = 1
for i in range(n):
ndp = [0 for _ in range(m+1)]
for i in range(m+1):
ndp[z[i][0]] += dp[i]
ndp[z[i][1]] += dp[i]
dp = ndp
res = dp[m]
for k in range(1, m):
s0 = 0
for c in s[-k:]:
s0 = z[s0][c]
dp = [0 for _ in range(m+1)]
dp[s0] = 1
for i in range(n - k):
ndp = [0 for _ in range(m+1)]
for i in range(m+1):
ndp[z[i][0]] += dp[i]
ndp[z[i][1]] += dp[i]
dp = ndp
for s1 in range(m): # skip m
v = dp[s1]
for c in s[-k:]:
if s1 == m: v = 0
s1 = z[s1][c]
if s1 == m: res += v
print(res)
``` | output | 1 | 22,858 | 0 | 45,717 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a binary string s.
Find the number of distinct cyclical binary strings of length n which contain s as a substring.
The cyclical string t contains s as a substring if there is some cyclical shift of string t, such that s is a substring of this cyclical shift of t.
For example, the cyclical string "000111" contains substrings "001", "01110" and "10", but doesn't contain "0110" and "10110".
Two cyclical strings are called different if they differ from each other as strings. For example, two different strings, which differ from each other by a cyclical shift, are still considered different cyclical strings.
Input
The first line contains a single integer n (1 β€ n β€ 40) β the length of the target string t.
The next line contains the string s (1 β€ |s| β€ n) β the string which must be a substring of cyclical string t. String s contains only characters '0' and '1'.
Output
Print the only integer β the number of distinct cyclical binary strings t, which contain s as a substring.
Examples
Input
2
0
Output
3
Input
4
1010
Output
2
Input
20
10101010101010
Output
962
Note
In the first example, there are three cyclical strings, which contain "0" β "00", "01" and "10".
In the second example, there are only two such strings β "1010", "0101".
Submitted Solution:
```
n=int(input())
s=input()
free = n-len(s)
t=[]
if(free):
for i in range(2**free):
s1=bin(i)[2:]
s2 = ("0"*(len(bin(2**free-1))-len(s1)-2)+s1)
t.append(s+s2)
res = set()
for i in range(n):
for s in t:
res.add(s[i:]+s[:i])
print(len(res))
``` | instruction | 0 | 22,859 | 0 | 45,718 |
No | output | 1 | 22,859 | 0 | 45,719 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,558 | 0 | 47,116 |
"Correct Solution:
```
S = input()
T = input()
print(len([i for i in range(len(S)) if S[i] != T[i]]))
``` | output | 1 | 23,558 | 0 | 47,117 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,560 | 0 | 47,120 |
"Correct Solution:
```
print(sum(c!=d for c,d in zip(input(),input())))
``` | output | 1 | 23,560 | 0 | 47,121 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,561 | 0 | 47,122 |
"Correct Solution:
```
s = input()
t = input()
print(sum([s[i] != t[i] for i in range(len(s))]))
``` | output | 1 | 23,561 | 0 | 47,123 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,562 | 0 | 47,124 |
"Correct Solution:
```
s = input()
t = input()
ans = 0
for a,b in zip(s,t):
ans += (a != b)
print(ans)
``` | output | 1 | 23,562 | 0 | 47,125 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,563 | 0 | 47,126 |
"Correct Solution:
```
s = list(input()); t = list(input())
print(sum([1 for i,j in zip(s,t) if i!=j]))
``` | output | 1 | 23,563 | 0 | 47,127 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,564 | 0 | 47,128 |
"Correct Solution:
```
n=input()
t=input()
c=0
for i in range(len(n)):
if n[i]!=t[i]:
c+=1
print(c)
``` | output | 1 | 23,564 | 0 | 47,129 |
Provide a correct Python 3 solution for this coding contest problem.
Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.
Operation: Choose one character of S and replace it with a different character.
Constraints
* S and T have lengths between 1 and 2\times 10^5 (inclusive).
* S and T consists of lowercase English letters.
* S and T have equal lengths.
Input
Input is given from Standard Input in the following format:
S
T
Output
Print the answer.
Examples
Input
cupofcoffee
cupofhottea
Output
4
Input
abcde
bcdea
Output
5
Input
apple
apple
Output
0 | instruction | 0 | 23,565 | 0 | 47,130 |
"Correct Solution:
```
a=input()
b=input()
n=len(a)
c=0
for i in range(n):
if(a[i]!=b[i]):
c+=1
print(c)
``` | output | 1 | 23,565 | 0 | 47,131 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,654 | 0 | 47,308 |
"Correct Solution:
```
for t in range(int(input())):
a,b,c,d=map(int,input().split(' '))
l,x,y,o=(a+b)//(min(a,b)+1),0,0,""
if a*l<=b:y=a+b
elif b*l<=a:x=a+b
else:x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
for i in range(c,d+1):o+="AB"[i%(l+1)==0] if i<=x else "BA"[(a+b-i+1)%(l+1)==0] if a+b-i+1<=y else "AB"[a-x+x//(l+1)-y//(l+1)==0]
print(o)
``` | output | 1 | 23,654 | 0 | 47,309 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,655 | 0 | 47,310 |
"Correct Solution:
```
T=int(input())
for TT in range(T):
a,b,c,d=map(int,input().split(' '))
l,x,y=(a+b)//(min(a,b)+1),0,0
if a*l<=b:
y=a+b
elif b*l<=a:
x=a+b
else:
x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
out=""
for i in range(c,d+1):
if i<=x:
out+="AB"[i%(l+1)==0]
elif a+b-i+1<=y:
out+="BA"[(a+b-i+1)%(l+1)==0]
else:
out+="AB"[a-x+x//(l+1)-y//(l+1)==0]
print(out)
``` | output | 1 | 23,655 | 0 | 47,311 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,656 | 0 | 47,312 |
"Correct Solution:
```
for t in range(int(input())):
a,b,c,d=map(int,input().split(' '));l,x,y,o=(a+b)//(min(a,b)+1),0,0,""
if a*l<=b:y=a+b
elif b*l<=a:x=a+b
else:x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
for i in range(c,d+1):o+="AB"[i%(l+1)==0] if i<=x else "BA"[(a+b-i+1)%(l+1)==0] if a+b-i+1<=y else "AB"[a-x+x//(l+1)-y//(l+1)==0]
print(o)
``` | output | 1 | 23,656 | 0 | 47,313 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,657 | 0 | 47,314 |
"Correct Solution:
```
T=int(input())
for TT in range(T):
a,b,c,d=map(int,input().split(' '))
l,x,y=(a+b)//(min(a,b)+1),0,0
if a*l<=b:
y=a+b
elif b*l<=a:
x=a+b
else:
x,y=(a*l-b)//(l-1),(b*l-a)//(l-1) #Like G2 tong long
out=""
for i in range(c,d+1):
if i<=x:
out+="AB"[i%(l+1)==0]
elif a+b-i+1<=y:
out+="BA"[(a+b-i+1)%(l+1)==0]
else:
out+="AB"[a-x+x//(l+1)-y//(l+1)==0]
print(out)
``` | output | 1 | 23,657 | 0 | 47,315 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,658 | 0 | 47,316 |
"Correct Solution:
```
T=int(input())
for TT in range(T):
a,b,c,d=map(int,input().split(' '))
l,x,y,out=(a+b)//(min(a,b)+1),0,0,""
if a*l<=b:y=a+b
elif b*l<=a:x=a+b
else:x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
for i in range(c,d+1):out+=("AB"[i%(l+1)==0]) if i<=x else "BA"[(a+b-i+1)%(l+1)==0] if a+b-i+1<=y else "AB"[a-x+x//(l+1)-y//(l+1)==0]
print(out)
``` | output | 1 | 23,658 | 0 | 47,317 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,659 | 0 | 47,318 |
"Correct Solution:
```
#!/usr/bin/env python3
import math
Q = int(input())
num = lambda x: (x, max(0, (x - 1) // K))
sub = lambda xs, ys: [x - y for (x, y) in zip(xs, ys)]
for _ in range(Q):
A, B, C, D = map(int, input().split())
K = math.ceil(max(A, B) / (min(A, B) + 1))
l, r = 0, A + 1
while r - l > 1:
m = (l + r) // 2
rA, rB = sub((A, B), num(m))
l, r = ((m, r), (l, m))[(rA + 1) * K < rB]
f = ''
for i in range(C - 1, D):
na, nb = num(l)
if i < na + nb:
f += ('A', 'B')[i % (K + 1) == K] if i < nb * (K + 1) else 'A'
else:
nb, na = num(B - nb)
j = A + B - i - 1
f += ('B', 'A')[j % (K + 1) == K] if j < na * (K + 1) else 'B'
print(f)
``` | output | 1 | 23,659 | 0 | 47,319 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,660 | 0 | 47,320 |
"Correct Solution:
```
#!/usr/bin/env python3
import math
Q = int(input())
for _ in range(Q):
A, B, C, D = map(int, input().split())
K = math.ceil(max(A, B) / (min(A, B) + 1))
lo, hi = 0, A + 1
while hi - lo > 1:
mid = (lo + hi) // 2
rA, rB = A - mid, B - max(0, (mid - 1) // K)
if (rA + 1) * K < rB:
hi = mid
else:
lo = mid
f = ''
for i in range(C - 1, D):
na = lo
nb = max(0, (na - 1) // K)
if i < nb * (K + 1):
f += ('A', 'B')[i % (K + 1) == K]
elif i < na + nb:f += 'A'
else:
j = A + B - i - 1
nb = B - nb
na = max(0, (nb - 1) // K)
if j < na * (K + 1):f += ('B', 'A')[j % (K + 1) == K]
else:f += 'B'
print(f)
``` | output | 1 | 23,660 | 0 | 47,321 |
Provide a correct Python 3 solution for this coding contest problem.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB | instruction | 0 | 23,661 | 0 | 47,322 |
"Correct Solution:
```
for t in range(int(input())):
a,b,c,d=map(int,input().split(' '));l,x,y,o=(a+b)//(min(a,b)+1),a+b,0,""
if a*l<=b:x,y=0,a+b
elif b*l>a:x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
for i in range(c,d+1):o+="AB"[i%(l+1)==0] if i<=x else "BA"[(a+b-i+1)%(l+1)==0] if a+b-i+1<=y else "AB"[a-x+x//(l+1)-y//(l+1)==0]
print(o)
``` | output | 1 | 23,661 | 0 | 47,323 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB
Submitted Solution:
```
T=int(input())
for t in range(T):
a,b,c,d=map(int,input().split(' '))
l,x,y,o=(a+b)//(min(a,b)+1),0,0,""
if a*l<=b:y=a+b
elif b*l<=a:x=a+b
else:x,y=(a*l-b)//(l-1),(b*l-a)//(l-1)
for i in range(c,d+1):o+="AB"[i%(l+1)==0] if i<=x else "BA"[(a+b-i+1)%(l+1)==0] if a+b-i+1<=y else "AB"[a-x+x//(l+1)-y//(l+1)==0]
print(o)
``` | instruction | 0 | 23,662 | 0 | 47,324 |
Yes | output | 1 | 23,662 | 0 | 47,325 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB
Submitted Solution:
```
Q = int(input())
def oldChain(index, blockLength):
if index%blockLength==0:
return "B"
else:
return "A"
def newChain(index, blockLength):
if index%blockLength==0:
return "A"
else:
return "B"
def residueChain(index, residueAyy):
if index>residueAyy:
return "B"
else:
return "A"
for i in range(Q):
line = [int(i) for i in input().split()]
A = line[0]
B = line[1]
C = line[2]
D = line[3]
maxLength = int((max(A, B)-1)/(min(A, B)+1))+1
equalisers = A+B
residueDifference = A-B
if maxLength!=1:
residueDifference %= (maxLength - 1)
residueDifference *= (A>B)-(A<B)
equalisers = int(abs(A-B)/(maxLength-1))*(maxLength+1)
neutral = int((A+B-equalisers)/(2*maxLength+2))
residue = (A+B-equalisers)%(2*maxLength+2)
intersectionStart = (neutral*(maxLength+1)+equalisers)*(A>=B)+(A+B-equalisers-neutral*(maxLength+1)-residue)*(A<B)
if residue>maxLength+1:
if residueDifference>=0:
intersectionStart += (maxLength + 1)
residueDifference -= (maxLength - 1)
else:
residueDifference += (maxLength - 1)
residue -= (maxLength + 1)
residueAyy = int((residue+residueDifference)/2)
ans = [0 for i in range(D-C+1)]
for i in range(C,D+1):
if i<intersectionStart+1:
ans[i-C]=oldChain(i,maxLength+1)
elif i>intersectionStart+residue:
ans[i-C]=newChain(A+B-i+1,maxLength+1)
else:
ans[i-C]=residueChain(i-intersectionStart,residueAyy)
print("".join(ans))
``` | instruction | 0 | 23,663 | 0 | 47,326 |
No | output | 1 | 23,663 | 0 | 47,327 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB
Submitted Solution:
```
from math import ceil
def solve(a, b, c, d):
l_max = int(ceil(max(a, b) / (min(a, b) + 1)))
# lB-A = (l^2-1)r2 + l^2 - m
tmp = l_max * b - a - l_max ** 2
div = l_max ** 2 - 1
if not div:
# ABδΊ€δΊ
if b > a:
c += 1
d += 1
e = d - c + 1
base = 'AB' if c & 1 else 'BA'
ans = base * (e // 2)
if e & 1:
ans += base[0]
return ans
r2 = ceil(tmp / (l_max ** 2 - 1))
m = r2 * (l_max ** 2 - 1) - tmp
r1 = b - l_max * (r2 + 1)
border = (l_max + 1) * r1 + m
if d <= border:
sr, sp = divmod(c - 1, l_max + 1)
er, ep = divmod(d, l_max + 1)
base = 'A' * l_max + 'B'
btwn = max(0, er - sr - 1)
ans = base[sp:] + base * btwn + base[:ep]
if m == 0:
if d == border:
if len(ans) > 1:
ans = ans[:-2] + 'BA'
else:
ans = 'A'
elif d == border - 1:
ans = ans[:-1] + 'B'
return ans
elif c > border:
c -= border
d -= border
sr, sp = divmod(c - 1, l_max + 1)
er, ep = divmod(d, l_max + 1)
base = 'B' * l_max + 'A'
btwn = max(0, er - sr - 1)
return base[sp:] + base * btwn + base[:ep]
d -= border
sr, sp = divmod(c - 1, l_max + 1)
er, ep = divmod(d, l_max + 1)
base1 = 'A' * l_max + 'B'
base2 = 'B' * l_max + 'A'
ans = base1[sp:] + base1 * (r1 - sr - 1) + 'A' * m + base2 * er + base2[:ep]
if m == 0:
if c == border:
ans = 'A' + ans[1:]
else:
ans = ans[:border - c - 1] + 'BA' + ans[border - c + 1:]
return ans
q = int(input())
buf = [solve(*map(int, input().split())) for _ in range(q)]
print('\n'.join(buf))
``` | instruction | 0 | 23,664 | 0 | 47,328 |
No | output | 1 | 23,664 | 0 | 47,329 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB
Submitted Solution:
```
from math import ceil
def solve(a, b, c, d):
if a == b:
s = 'AB' * a
return s[c - 1:d]
if a > b:
long_len = int(ceil(a / (b + 1)))
long_cnt_a = a // long_len
remain_a = a - long_cnt_a * long_len
if remain_a == 0:
long_cnt_a -= 1
remain_a = long_len
if long_cnt_a == b:
# AAABAAABAAABAA
sr, sp = divmod(c - 1, (long_len + 1))
er, ep = divmod(d, (long_len + 1))
base = 'A' * long_len + 'B'
btwn = max(0, er - sr - 1)
return base[sp:] + base * btwn + base[:ep]
# A: (long) (long) ... (long) (remain)
# B: 1 1 1 ... (remain) (long) ... (long)
long_cnt_b, remain_b = divmod(b - (long_cnt_a + 1), (long_len - 1))
remain_b += 1
b_cnt_1 = b - long_len * long_cnt_b - remain_b
aa = [long_len] * long_cnt_a + [remain_a]
bb = [1] * b_cnt_1 + [remain_b] + [long_len] * long_cnt_b
s = ''
for al, bl in zip(aa, bb):
s += 'A' * al + 'B' * bl
return s[c - 1:d]
long_len = int(ceil(b / (a + 1)))
long_cnt_b = b // long_len
remain_b = b - long_cnt_b * long_len
if remain_b == 0:
long_cnt_b -= 1
remain_b = long_len
if long_cnt_b == a:
s = 'B' * remain_b + ('A' + 'B' * long_len) * long_cnt_b
else:
long_cnt_a, remain_a = divmod(a - (long_cnt_b + 1), (long_len - 1))
remain_a += 1
a_cnt_1 = a - long_len * long_cnt_a - remain_a
aa = [long_len] * long_cnt_a + [remain_a] + [1] * a_cnt_1
bb = [remain_b] + [long_len] * long_cnt_b
s = ''.join('A' * al + 'B' * bl for al, bl in zip(aa, bb))
return s[c - 1:d]
q = int(input())
buf = [solve(*map(int, input().split())) for _ in range(q)]
print('\n'.join(buf))
``` | instruction | 0 | 23,665 | 0 | 47,330 |
No | output | 1 | 23,665 | 0 | 47,331 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let f(A, B), where A and B are positive integers, be the string satisfying the following conditions:
* f(A, B) has length A + B;
* f(A, B) contains exactly A letters `A` and exactly B letters `B`;
* The length of the longest substring of f(A, B) consisting of equal letters (ex., `AAAAA` or `BBBB`) is as small as possible under the conditions above;
* f(A, B) is the lexicographically smallest string satisfying the conditions above.
For example, f(2, 3) = `BABAB`, and f(6, 4) = `AABAABAABB`.
Answer Q queries: find the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Constraints
* 1 \leq Q \leq 10^3
* 1 \leq A_i, B_i \leq 5 \times 10^8
* 1 \leq C_i \leq D_i \leq A_i + B_i
* D_i - C_i + 1 \leq 100
* All input values are integers.
Input
Input is given from Standard Input in the following format:
Q
A_1 B_1 C_1 D_1
A_2 B_2 C_2 D_2
:
A_Q B_Q C_Q D_Q
Output
For each query i in order of input, print a line containing the substring of f(A_i, B_i) from position C_i to position D_i (1-based).
Example
Input
5
2 3 1 5
6 4 1 10
2 3 4 4
6 4 3 7
8 10 5 8
Output
BABAB
AABAABAABB
A
BAABA
ABAB
Submitted Solution:
```
#!/usr/bin/env python3
import math
import bisect
Q = int(input())
for _ in range(Q):
A, B, C, D = map(int, input().split())
K = math.ceil(max(A, B) / (min(A, B) + 1))
xs = ((A - i + 1) * K < B - max(0, (i - 1) // K) for i in range(A + 1))
p = bisect.bisect(list(xs), False)
f = ''
for i in range(C - 1, D):
na = p
nb = max(0, (na - 1) // K)
if i < nb * (K + 1):
f += ('A', 'B')[i % (K + 1) == K]
elif i < na + nb:
f += 'A'
else:
j = A + B - i - 1
nb = B - nb
na = max(0, (nb - 1) // K)
if j < na * (K + 1):
f += ('B', 'A')[j % (K + 1) == K]
else:
f += 'B'
print(f)
``` | instruction | 0 | 23,666 | 0 | 47,332 |
No | output | 1 | 23,666 | 0 | 47,333 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three. | instruction | 0 | 24,448 | 0 | 48,896 |
Tags: implementation
Correct Solution:
```
import math as ma
from sys import exit
def li():
return list(map(int,input().split()))
def num():
return map(int,input().split())
def nu():
return int(input())
s=input()
f=[0]*26
for ch in s:
f[ord(ch)-97]+=1
c=0
x=[]
v=[]
for i in range(26):
if(f[i]>0):
c+=1
x.append(i)
v.append(f[i])
xx=sorted(zip(v,x))
if(c==1):
print("No")
exit()
if(c%2==0):
if((c==2 and(xx[0][0]!=1)) or c==4):
print("Yes")
else:
print("No")
else:
if(c==3):
if(xx[0][0]==1 and xx[1][0]==1 and xx[2][0]==1):
print("No")
else:
print("Yes")
else:
print("No")
``` | output | 1 | 24,448 | 0 | 48,897 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three. | instruction | 0 | 24,450 | 0 | 48,900 |
Tags: implementation
Correct Solution:
```
y = input()
x = {i: y.count(i) for i in set(y)}
print('YNEOS'[(any(x[i]<2 for i in x)if len(x)==2 else len(y)<4)if 1<len(x)<5 else 1::2])
``` | output | 1 | 24,450 | 0 | 48,901 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three. | instruction | 0 | 24,451 | 0 | 48,902 |
Tags: implementation
Correct Solution:
```
# http://codeforces.com/problemset/problem/955/B
# Not simply beatiful strings
string = input()
d = {}
for c in string:
try:
d[c] += 1
except:
d[c] = 1
if len(d) == 1:
print('No')
elif len(d) == 2:
valid = True
for v in d.values():
if v == 1:
valid = False
break
if valid:
print('Yes')
else:
print('No')
elif len(d) == 3:
if len(string) > 3:
print('Yes')
else:
print('No')
elif len(d) == 4:
print('Yes')
else:
print('No')
``` | output | 1 | 24,451 | 0 | 48,903 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three. | instruction | 0 | 24,453 | 0 | 48,906 |
Tags: implementation
Correct Solution:
```
from functools import reduce
s = input()
num_of_chars_in_s = {}
for char in s:
if char not in num_of_chars_in_s:
num_of_chars_in_s[char] = 0
num_of_chars_in_s[char] += 1
answer = False
if len(num_of_chars_in_s) < 2 or len(num_of_chars_in_s) > 4:
pass # answer = False
elif len(num_of_chars_in_s) == 2:
answer = reduce(lambda x, y: x and y, [num > 1 for _, num in num_of_chars_in_s.items()])
elif len(num_of_chars_in_s) == 3:
answer = reduce(lambda x, y: x or y, [num > 1 for _, num in num_of_chars_in_s.items()])
elif len(num_of_chars_in_s) == 4:
answer = reduce(lambda x, y: x or y, [num >= 1 for _, num in num_of_chars_in_s.items()])
print('Yes' if answer else 'No')
``` | output | 1 | 24,453 | 0 | 48,907 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
from collections import defaultdict
s = list(input())
dic = defaultdict(int)
for i in s:
dic[i] += 1
if len(dic) > 4:
print("No")
elif len(dic) == 3:
if len(s) == 3:
print("No")
else:
print("Yes")
elif len(dic) == 4:
print("Yes")
elif len(dic) == 2:
if min(dic.values()) >= 2:
print("Yes")
else:
print("No")
else:
print("No")
``` | instruction | 0 | 24,455 | 0 | 48,910 |
Yes | output | 1 | 24,455 | 0 | 48,911 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
ab = 'abcdefghijklmnopqrstuvwxyz'
ab_ = [0] * 26
string = str(input())
if len(string) < 4:
print('No')
exit(0)
k = 0
for i in range(len(string)):
for j in range(26):
if string[i] == ab[j]:
ab_[j] += 1
for i in range(26):
if ab_[i] > 0:
k += 1
if k > 4:
print('No')
exit(0)
if k == 1:
print('No')
exit(0)
if k == 2:
for i in range(26):
if ab_[i] == 1:
print('No')
exit(0)
print('Yes')
``` | instruction | 0 | 24,456 | 0 | 48,912 |
Yes | output | 1 | 24,456 | 0 | 48,913 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
from collections import defaultdict
s = input()
d = defaultdict(int)
for i in s:
d[i] += 1
if len(s) < 4:
print("No")
exit()
vals = sorted(d.values())
if len(vals) == 1:
print("No")
elif len(vals) == 2:
if vals[0] == 1:
print("No")
else:
print("Yes")
elif len(vals) == 3:
print("Yes")
elif len(vals) == 4:
print("Yes")
elif len(vals) > 4:
print("No")
``` | instruction | 0 | 24,457 | 0 | 48,914 |
Yes | output | 1 | 24,457 | 0 | 48,915 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
import sys
s=input()
a=list(s)
# print(a)
d={}
b=list(set(a))
if(len(b)>4 or len(b)==1):
print("No")
sys.exit()
if(len(b)==4):
print("Yes")
sys.exit()
if(len(b)==2):
c1=0
c2=0
for k in a:
c1+=int(k==b[0])
c2+=int(k==b[1])
if(c1>1 and c2>1):
print("Yes")
else:
print("No")
else:
c1=0
c2=0
c3=0
for k in a:
c1+=int(k==b[0])
c2+=int(k==b[1])
c3+=int(k==b[2])
if(c1>1 or c2>1 or c3>1):
print("Yes")
else:
print("No")
``` | instruction | 0 | 24,458 | 0 | 48,916 |
Yes | output | 1 | 24,458 | 0 | 48,917 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
ch=input()
if ch=='ababa' or ch=='zzcxx' or ch=='abcd':
print('YES')
elif ch=='yeee':
print('NO')
else:
print('NO')
``` | instruction | 0 | 24,459 | 0 | 48,918 |
No | output | 1 | 24,459 | 0 | 48,919 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
# http://codeforces.com/problemset/problem/955/B
# Not simply beautiful strings
string = input()
sequences = 0
checked = []
for i in range(len(string)):
if sequences >= 2:
print("Yes")
break
for j in range(i + 1, len(string)):
if string[i] in checked: break
if string[i] == string[j]:
sequences += 1
break
checked.append(string[i])
if sequences < 2:
print("No")
``` | instruction | 0 | 24,460 | 0 | 48,920 |
No | output | 1 | 24,460 | 0 | 48,921 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
s = [ch for ch in input()]
Set = set(s)
List = list(Set)
if len(Set)==4 or len(Set)==3 and len(s)>3 or len(Set)==2 and (s.count(List[0])>2) and (s.count(List[-1])>2): print('Yes')
else: print('No')
``` | instruction | 0 | 24,461 | 0 | 48,922 |
No | output | 1 | 24,461 | 0 | 48,923 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call a string adorable if its letters can be realigned in such a way that they form two consequent groups of equal symbols (note that different groups must contain different symbols). For example, ababa is adorable (you can transform it to aaabb, where the first three letters form a group of a-s and others β a group of b-s), but cccc is not since in each possible consequent partition letters in these two groups coincide.
You're given a string s. Check whether it can be split into two non-empty subsequences such that the strings formed by these subsequences are adorable. Here a subsequence is an arbitrary set of indexes of the string.
Input
The only line contains s (1 β€ |s| β€ 105) consisting of lowercase latin letters.
Output
Print Β«YesΒ» if the string can be split according to the criteria above or Β«NoΒ» otherwise.
Each letter can be printed in arbitrary case.
Examples
Input
ababa
Output
Yes
Input
zzcxx
Output
Yes
Input
yeee
Output
No
Note
In sample case two zzcxx can be split into subsequences zc and zxx each of which is adorable.
There's no suitable partition in sample case three.
Submitted Solution:
```
R = lambda : map(int, input().split())
s = input()
from collections import Counter
c = Counter(s)
if len(c)>4 or len(c)<2:
print("No"); exit();
if len(c)==3 and max(c.values())>1:
print("Yes"); exit();
if len(c)==2 and min(c.values())>1:
print("Yes"); exit();
print("No");
``` | instruction | 0 | 24,462 | 0 | 48,924 |
No | output | 1 | 24,462 | 0 | 48,925 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,509 | 0 | 49,018 |
"Correct Solution:
```
n = int(input())
print(input().count("ABC"))
``` | output | 1 | 24,509 | 0 | 49,019 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,510 | 0 | 49,020 |
"Correct Solution:
```
input()
text = input().split("ABC")
print(len(text)-1)
``` | output | 1 | 24,510 | 0 | 49,021 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,511 | 0 | 49,022 |
"Correct Solution:
```
#150_B
n = int(input())
s = input()
print(s.count('ABC'))
``` | output | 1 | 24,511 | 0 | 49,023 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,512 | 0 | 49,024 |
"Correct Solution:
```
N = int(input())
X = input()
print(X.count("ABC"))
``` | output | 1 | 24,512 | 0 | 49,025 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,513 | 0 | 49,026 |
"Correct Solution:
```
n = int(input())
s = str(input())
print(s.count('ABC'))
``` | output | 1 | 24,513 | 0 | 49,027 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,514 | 0 | 49,028 |
"Correct Solution:
```
input()
print(str(input()).count("ABC"))
``` | output | 1 | 24,514 | 0 | 49,029 |
Provide a correct Python 3 solution for this coding contest problem.
We have a string S of length N consisting of uppercase English letters.
How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?
Constraints
* 3 \leq N \leq 50
* S consists of uppercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print number of occurrences of `ABC` in S as contiguous subsequences.
Examples
Input
10
ZABCDBABCQ
Output
2
Input
19
THREEONEFOURONEFIVE
Output
0
Input
33
ABCCABCBABCCABACBCBBABCBCBCBCABCB
Output
5 | instruction | 0 | 24,515 | 0 | 49,030 |
"Correct Solution:
```
_ = input()
print(input().count('ABC'))
``` | output | 1 | 24,515 | 0 | 49,031 |
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