message stringlengths 2 11.9k | message_type stringclasses 2 values | message_id int64 0 1 | conversation_id int64 137 108k | cluster float64 18 18 | __index_level_0__ int64 274 217k |
|---|---|---|---|---|---|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
# TAIWAN NUMBER ONE!!!!!!!!!!!!!!!!!!!
# TAIWAN NUMBER ONE!!!!!!!!!!!!!!!!!!!
# TAIWAN NUMBER ONE!!!!!!!!!!!!!!!!!!!
from sys import stdin, stdout
import math
N = int(input())
s = input()
#N,M,K = [int(x) for x in stdin.readline().split()]
#arr = [int(x) for x in stdin.readline().split()]
cur = ''
L = 0
res = 0
for letter in s:
if letter==cur and letter=='x':
L += 1
else:
if letter=='x':
L = 1
else:
L = 0
if L>=3:
res += 1
cur = letter
print(res)
``` | instruction | 0 | 13,086 | 18 | 26,172 |
Yes | output | 1 | 13,086 | 18 | 26,173 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
n = int(input())
x = input()
count = 0
ans = 0
if x.count('xxx') == 0:
print(0)
else:
for i in range(n):
if x[i] == 'x':
count += 1
if count >= 3:
ans += 1
else:
count = 0
print(ans)
``` | instruction | 0 | 13,087 | 18 | 26,174 |
Yes | output | 1 | 13,087 | 18 | 26,175 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
n=int(input())
a=input()
count=0
for i in range(0,n-2):
print (a[i:i+3])
if (a[i:i+3]=='xxx'):
count+=1
print (count)
``` | instruction | 0 | 13,088 | 18 | 26,176 |
No | output | 1 | 13,088 | 18 | 26,177 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
#code
#time complexity o(n)
#space complexity o(1)
def func(s):
n = len(s)
co=0
res=0
for i in range(n):
if s[i]=='x':
co+=1
if co>=3:
res+=1
else:
co=0
return res
s = input()
print(func(str(s)))
``` | instruction | 0 | 13,089 | 18 | 26,178 |
No | output | 1 | 13,089 | 18 | 26,179 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
n = int(input())
st = input()
ans = 0
pos = st.find('xxx')
ans = 0
if pos == -1:
print(0)
while pos != -1:
ans += 1
st = st[:pos]+st[pos+1:]
pos = st.find('xxx')
print(ans)
``` | instruction | 0 | 13,090 | 18 | 26,180 |
No | output | 1 | 13,090 | 18 | 26,181 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You can not just take the file and send it. When Polycarp trying to send a file in the social network "Codehorses", he encountered an unexpected problem. If the name of the file contains three or more "x" (lowercase Latin letters "x") in a row, the system considers that the file content does not correspond to the social network topic. In this case, the file is not sent and an error message is displayed.
Determine the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. Print 0 if the file name does not initially contain a forbidden substring "xxx".
You can delete characters in arbitrary positions (not necessarily consecutive). If you delete a character, then the length of a string is reduced by 1. For example, if you delete the character in the position 2 from the string "exxxii", then the resulting string is "exxii".
Input
The first line contains integer n (3 ≤ n ≤ 100) — the length of the file name.
The second line contains a string of length n consisting of lowercase Latin letters only — the file name.
Output
Print the minimum number of characters to remove from the file name so after that the name does not contain "xxx" as a substring. If initially the file name dost not contain a forbidden substring "xxx", print 0.
Examples
Input
6
xxxiii
Output
1
Input
5
xxoxx
Output
0
Input
10
xxxxxxxxxx
Output
8
Note
In the first example Polycarp tried to send a file with name contains number 33, written in Roman numerals. But he can not just send the file, because it name contains three letters "x" in a row. To send the file he needs to remove any one of this letters.
Submitted Solution:
```
num=int(input())
string=input()
arr=[0]*num
start=0
counter=0
for t in range (num):
if string[t] !="x":
arr[counter]=start
counter+=1
start=0
else:
start+=1
if arr.count(0)==num:
print (0)
else:
arr[counter]=start
total=0
for k in range (num):
if arr[k] !=0:
if arr[k]>=3:
total=total+(arr[k]-2)
print (total)
``` | instruction | 0 | 13,091 | 18 | 26,182 |
No | output | 1 | 13,091 | 18 | 26,183 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,187 | 18 | 26,374 |
"Correct Solution:
```
def main():
S = input()
print("%s %s" % (S[:4], S[4:]))
if __name__ == "__main__":
main()
``` | output | 1 | 13,187 | 18 | 26,375 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,188 | 18 | 26,376 |
"Correct Solution:
```
s=input()
a=s[:4]
b=s[4:]
print(a+" "+b)
``` | output | 1 | 13,188 | 18 | 26,377 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,189 | 18 | 26,378 |
"Correct Solution:
```
s = input()
a = s[:4]
b = s[4:]
print(a + ' ' + b)
``` | output | 1 | 13,189 | 18 | 26,379 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,190 | 18 | 26,380 |
"Correct Solution:
```
# 2019/12/21
s=input()
print(s[:4]+' '+s[4:])
``` | output | 1 | 13,190 | 18 | 26,381 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,191 | 18 | 26,382 |
"Correct Solution:
```
a = input()
ans = a[:4] + ' ' + a[4:]
print(ans)
``` | output | 1 | 13,191 | 18 | 26,383 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,192 | 18 | 26,384 |
"Correct Solution:
```
S= input()
print(S[:4]+" "+S[-8:])
``` | output | 1 | 13,192 | 18 | 26,385 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,193 | 18 | 26,386 |
"Correct Solution:
```
s = list(input())
for i in range(12):
if i!=3:
print(s[i], end="")
else:
print(s[i]+" ", end="")
print()
``` | output | 1 | 13,193 | 18 | 26,387 |
Provide a correct Python 3 solution for this coding contest problem.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL | instruction | 0 | 13,194 | 18 | 26,388 |
"Correct Solution:
```
s = str(input())
print(s[0:4]+" "+s[4:])
``` | output | 1 | 13,194 | 18 | 26,389 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
N=input()
print(N[0:4]+" "+N[4:16])
``` | instruction | 0 | 13,195 | 18 | 26,390 |
Yes | output | 1 | 13,195 | 18 | 26,391 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
def main():
s=input()
print(s[0:4],s[4:],sep=' ')
main()
``` | instruction | 0 | 13,196 | 18 | 26,392 |
Yes | output | 1 | 13,196 | 18 | 26,393 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
s=input()
for i, j in enumerate(s):
if i==4:
print(" ", end="")
print(j, end="")
print("")
``` | instruction | 0 | 13,197 | 18 | 26,394 |
Yes | output | 1 | 13,197 | 18 | 26,395 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
code_festival = input()
code = code_festival[:4]
festival = code_festival[4:]
code_festival = code + " " + festival
print (code_festival)
``` | instruction | 0 | 13,198 | 18 | 26,396 |
Yes | output | 1 | 13,198 | 18 | 26,397 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
N = int(input())
usa = list(map(int, input().split()))
print (usa[0])
for i, j in enumerate(usa):
if(usa[j]-1 == i):
count+=1
if(i >= N/2):
break
print (count)
``` | instruction | 0 | 13,199 | 18 | 26,398 |
No | output | 1 | 13,199 | 18 | 26,399 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
a = input()
a_first, a_last = s[:4], s[4:]
print(a_first + ' ' + a_last)
``` | instruction | 0 | 13,200 | 18 | 26,400 |
No | output | 1 | 13,200 | 18 | 26,401 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
a=input()
for i in range(4):
print(a[i],end='')
print(' ',end='')
for i in range(8):
print(a[i+4],end='')
``` | instruction | 0 | 13,201 | 18 | 26,402 |
No | output | 1 | 13,201 | 18 | 26,403 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This contest is `CODE FESTIVAL`. However, Mr. Takahashi always writes it `CODEFESTIVAL`, omitting the single space between `CODE` and `FESTIVAL`.
So he has decided to make a program that puts the single space he omitted.
You are given a string s with 12 letters. Output the string putting a single space between the first 4 letters and last 8 letters in the string s.
Constraints
* s contains exactly 12 letters.
* All letters in s are uppercase English letters.
Input
The input is given from Standard Input in the following format:
s
Output
Print the string putting a single space between the first 4 letters and last 8 letters in the string s. Put a line break at the end.
Examples
Input
CODEFESTIVAL
Output
CODE FESTIVAL
Input
POSTGRADUATE
Output
POST GRADUATE
Input
ABCDEFGHIJKL
Output
ABCD EFGHIJKL
Submitted Solution:
```
s = list(input())
s = s.insert(4,' ')
print(''.join(s))
``` | instruction | 0 | 13,202 | 18 | 26,404 |
No | output | 1 | 13,202 | 18 | 26,405 |
Provide a correct Python 3 solution for this coding contest problem.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff | instruction | 0 | 13,228 | 18 | 26,456 |
"Correct Solution:
```
a=[['\'',',','.','!','?'],
['a','b','c','A','B','C'],
['d','e','f','D','E','F'],
['g','h','i','G','H','I'],
['j','k','l','J','K','L'],
['m','n','o','M','N','O'],
['p','q','r','s','P','Q','R','S'],
['t','u','v','T','U','V'],
['w','x','y','z','W','X','Y','Z']]
while 1:
try:b=input()+'@'
except:break
c=0
ans=''
for i in range(len(b)-1):
if b[i]!=b[i+1]:
if b[i]!='0':
d=int(b[i])-1
ans+=a[d][c%len(a[d])]
c=0
else: c+=1
if b[i]==b[i+1]=='0':ans+=' '
print(ans)
``` | output | 1 | 13,228 | 18 | 26,457 |
Provide a correct Python 3 solution for this coding contest problem.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff | instruction | 0 | 13,229 | 18 | 26,458 |
"Correct Solution:
```
# AOJ 1003: Extraordinary Girl II
# Python3 2018.7.4 bal4u
tbl = ["", "',.!?", "abcABC", "defDEF", "ghiGHI", "jklJKL", \
"mnoMNO", "pqrsPQRS", "tuvTUV", "wxyzWXYZ"]
while True:
try: s = input().strip()
except: break
ans, i = '', 0
while i < len(s):
c = s[i]
w, d, i = 0, int(c), i+1
while i < len(s) and s[i] == c: i, w = i+1, w+1
if d == 0: ans += ' '*w
else: ans += tbl[d][w%len(tbl[d])]
print(ans)
``` | output | 1 | 13,229 | 18 | 26,459 |
Provide a correct Python 3 solution for this coding contest problem.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff | instruction | 0 | 13,230 | 18 | 26,460 |
"Correct Solution:
```
T = [
None,
"',.!?",
"abcABC",
"defDEF",
"ghiGHI",
"jklJKL",
"mnoMNO",
"pqrsPQRS",
"tuvTUV",
"wxyzWXYZ",
]
try:
while 1:
ans = []
*S, = map(int, input())
S.append(0)
prv = 0
cur = -1
for c in S:
if c == prv:
if c == 0:
ans.append(" ")
cur = 0
else:
cur += 1
else:
if prv != 0:
t = T[int(prv)]
ans.append(t[cur%len(t)])
cur = 0
prv = c
print(*ans, sep='')
except EOFError:
...
``` | output | 1 | 13,230 | 18 | 26,461 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff
Submitted Solution:
```
a=[['\'',',','.','!','?'],
['a','b','c','A','B','C'],
['d','e','f','D','E','F'],
['g','h','i','G','H','I'],
['j','k','l','J','K','L'],
['m','n','o','M','N','O'],
['p','q','r','s','P','Q','R','S'],
['t','u','v','T','U','V'],
['w','x','y','z','W','X','Y','Z']]
while 1:
try:b=input()+'@'
except:pass
c=0
ans=''
for i in range(len(b)-1):
if b[i]!=b[i+1]:
if b[i]!='0':
d=int(b[i])-1
ans+=a[d][c%len(a[d])]
c=0
else: c+=1
if b[i]==b[i+1]=='0':ans+=' '
print(ans)
``` | instruction | 0 | 13,231 | 18 | 26,462 |
No | output | 1 | 13,231 | 18 | 26,463 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff
Submitted Solution:
```
keys = [[' '],
['\'', ',','.', '!', '?'],
['a', 'b', 'c', 'A', 'B', 'C'],
['d', 'e', 'f', 'D', 'E', 'F'],
['g', 'h', 'i', 'G', 'H', 'I'],
['j', 'k', 'l', 'J', 'K', 'L'],
['m', 'n', 'o', 'M', 'N', 'O'],
['p', 'q', 'r', 'P', 'Q', 'R'],
['t', 'u', 'v', 'T', 'U', 'V'],
['x', 'y', 'z', 'X', 'Y', 'Z']]
def main():
count = -1
data = input()
before_number = data[0]
output = []
for n in data:
if before_number == n:
count += 1
else:
if before_number == '0':
for zero in range(count):
output.append(' ')
else:
output.append(keys[int(before_number)][count])
# print(keys[int(before_number)][count], end='')
before_number = n
count = 0
else:
# print('before_number: ' + before_number + ', count: ' + str(count))
# print()
if before_number == '0':
for zero in range(count):
output.append(' ')
else:
output.append(keys[int(before_number)][count])
# print(keys[int(before_number)][count], end='')
# output.append(keys[int(before_number)][count])
# print(keys[int(n)][count])
print(''.join(output))
if __name__ == '__main__':
while True:
try:
main()
except EOFError:
break
``` | instruction | 0 | 13,232 | 18 | 26,464 |
No | output | 1 | 13,232 | 18 | 26,465 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff
Submitted Solution:
```
keys = [[' '],
['\'', ',','.', '!', '?'],
['a', 'b', 'c', 'A', 'B', 'C'],
['d', 'e', 'f', 'D', 'E', 'F'],
['g', 'h', 'i', 'G', 'H', 'I'],
['j', 'k', 'l', 'J', 'K', 'L'],
['m', 'n', 'o', 'M', 'N', 'O'],
['p', 'q', 'r', 'P', 'Q', 'R'],
['t', 'u', 'v', 'T', 'U', 'V'],
['x', 'y', 'z', 'X', 'Y', 'Z']]
def main():
count = -1
data = input()
before_number = data[0]
output = []
for n in data:
if before_number == n:
count += 1
else:
if before_number == '0':
for zero in range(count):
output.append(' ')
else:
output.append(keys[int(before_number)][count])
before_number = n
count = 0
else:
if before_number == '0':
for zero in range(count):
output.append(' ')
else:
output.append(keys[int(before_number)][count])
print(''.join(output))
if __name__ == '__main__':
while True:
try:
main()
except EOFError:
break
``` | instruction | 0 | 13,233 | 18 | 26,466 |
No | output | 1 | 13,233 | 18 | 26,467 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
She loves e-mail so much! She sends e-mails by her cellular phone to her friends when she has breakfast, she talks with other friends, and even when she works in the library! Her cellular phone has somewhat simple layout (Figure 1). Pushing button 1 once displays a character (’), pushing
<image>
it twice in series displays a character (,), and so on, and pushing it 6 times displays (’) again. Button 2 corresponds to charaters (abcABC), and, for example, pushing it four times displays (A). Button 3-9 have is similar to button 1. Button 0 is a special button: pushing it once make her possible to input characters in the same button in series. For example, she has to push “20202” to display “aaa” and “660666” to display “no”. In addition, pushing button 0 n times in series (n > 1) displays n − 1 spaces. She never pushes button 0 at the very beginning of her input. Here are some examples of her input and output:
666660666 --> No
44444416003334446633111 --> I’m fine.
20202202000333003330333 --> aaba f ff
One day, the chief librarian of the library got very angry with her and hacked her cellular phone when she went to the second floor of the library to return books in shelves. Now her cellular phone can only display button numbers she pushes. Your task is to write a program to convert the sequence of button numbers into correct characters and help her continue her e-mails!
Input
Input consists of several lines. Each line contains the sequence of button numbers without any spaces. You may assume one line contains no more than 10000 numbers. Input terminates with EOF.
Output
For each line of input, output the corresponding sequence of characters in one line.
Example
Input
666660666
44444416003334446633111
20202202000333003330333
Output
No
I'm fine.
aaba f ff
Submitted Solution:
```
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
import re
import math
import collections
import itertools
import functools
DEBUG = True
DEBUG = False
def dbg(*args):
if DEBUG:
print("DBG: ", file=sys.stderr, end="")
print(*args, file=sys.stderr)
BUTTON_CHARS = (
"',.!?",
"abcABC",
"defDEF",
"ghiGHI",
"jklJKL",
"mnoMNO",
"pqrsPRQS",
"tuvTUV",
"wxyzWXYZ",
)
def pieces(s):
char = None
count = 0;
for c in s:
if c != char:
if char is not None:
yield (char, count)
char = c
count = 1
else:
count += 1
yield (char, count)
def solve(s):
for char, count in pieces(s):
if char in "123456789":
idx = int(char) - 1
bchars = BUTTON_CHARS[idx]
out = bchars[(count-1) % len(bchars)]
print(out, end="")
elif char == "0":
print(" " * (count-1), end="")
else:
assert False
print()
def main():
for s in sys.stdin:
s = s.strip()
solve(s)
if __name__ == "__main__": main()
``` | instruction | 0 | 13,234 | 18 | 26,468 |
No | output | 1 | 13,234 | 18 | 26,469 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,235 | 18 | 26,470 |
"Correct Solution:
```
def main():
def pearser(s, n):
if s == "":
return ""
i = 0
while 1:
if not s[i].isdigit():break
i += 1
if i == 0:
r = pearser(s[i + 1:], n - 1)
return s[0] + r
if s[i] == "(":
r = Parentp(s[i:], n, int(s[:i]))
else:
r = s[i] * int(s[:i])
if len(r) >= n:
return r[:n]
r += pearser(s[i+1:], n - len(r))
return r
def Parentp(s, n, p):
if s == "": return ""
b = 0
c = 0
i = 0
while 1:
if s[i] == "(":
c += 1
if s[i] == ")":
c -= 1
if c == 0:
break
i += 1
r = pearser(s[b + 1:i], n)
l = len(r)
if l * p >= n:
r = r * (n // l + 1)
return r[:n]
r = r * p
r += pearser(s[i+1:], n - len(r))
return r
def m(s,n):
n = int(n)
r = pearser(s, n + 1)
if len(r) <= n:
print(0)
return
print(r[n])
while 1:
s, n = map(str, input().split())
if s == n == "0":
break
m(s, n)
main()
``` | output | 1 | 13,235 | 18 | 26,471 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,236 | 18 | 26,472 |
"Correct Solution:
```
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time,copy,functools
sys.setrecursionlimit(10**7)
inf = 10**20
eps = 1.0 / 10**13
mod = 10**9+7
dd = [(-1,0),(0,1),(1,0),(0,-1)]
ddn = [(-1,0),(-1,1),(0,1),(1,1),(1,0),(1,-1),(0,-1),(-1,-1)]
def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def pf(s): return print(s, flush=True)
def main():
rr = []
def f(s,n):
def _f(s, n):
# print('_f', s,n)
l = len(s)
if l == 0 or n < 1:
return ''
r = ''
if '1' <= s[0] <= '9':
c = int(s[0])
ti = 1
for i in range(1,l):
ti = i
if not ('0' <= s[i] <= '9'):
break
c *= 10
c += int(s[i])
if s[ti] == '(':
k = 1
ki = ti+1
for i in range(ti+1,l):
if s[i] == '(':
k += 1
elif s[i] == ')':
k -= 1
if k == 0:
ki = i
break
kr = _f(s[ti+1:ki], n)
kl = len(kr)
if kl * c >= n:
r = kr * (n//kl+1)
return r[:n]
r = kr * c
r += _f(s[ki+1:], n - len(r))
return r
else:
r += s[ti] * c
if len(r) >= n:
return r[:n]
r += _f(s[ti+1:], n - len(r))
return r
r = s[0] + _f(s[1:], n - 1)
return r
fr = _f(s, n+1)
# print(len(fr),fr[n:n+1])
if len(fr) <= n:
return '0'
return fr[n]
while 1:
s,n = LS()
if s == '0' and n == '0' :
break
rr.append(f(s, int(n)))
# print('rr', rr[-1])
return '\n'.join(map(str,rr))
print(main())
``` | output | 1 | 13,236 | 18 | 26,473 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,237 | 18 | 26,474 |
"Correct Solution:
```
from collections import defaultdict
def parse_expr(s,i,num):
if i < len(s) and f_num[s[i]]:
n,i = parse_num(s,i,num)
if s[i] == "(":
i += 1
su = 0
while i < len(s) and s[i] != ")":
e,i = parse_expr(s,i,num)
su += e
return su*n,i+1
else:
k,i = parse_alp(s,i,n)
return k+n-1,i
else:
k,i = parse_alp(s,i,num)
return k,i
def parse_num(s,i,num):
m = int(s[i])
i += 1
while i < len(s) and f_num[s[i]]:
m *= 10
m += int(s[i])
i += 1
return num*m,i
def parse_alp(s,i,num):
k = 1
i += 1
while i < len(s) and f_alp[s[i]]:
k += 1
i += 1
return k,i
def find(s,l,r,i):
if l == r:
return 0
su,k = parse_expr(s,l,1)
if i < su:
if l < r and f_alp[s[l]]:
return s[l+i]
else:
n,l = parse_num(s,l,1)
if l < r and s[l] == "(":
return find(s,l+1,k-1,i%(su//n))
else:
return find(s,l,k,i%(su//n))
else:
return find(s,k,r,i-su)
while 1:
s,i = input().split()
if s == i == "0":break
i = int(i)
f_alp = defaultdict(lambda : 0)
f_num = defaultdict(lambda : 0)
for a in "ABCDEFGHIJKLMNOPQRSTUVWXYZ":
f_alp[a] = 1
for a in range(10):
f_num[str(a)] = 1
print(find(s,0,len(s),i))
``` | output | 1 | 13,237 | 18 | 26,475 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,238 | 18 | 26,476 |
"Correct Solution:
```
def uncompress(text, L):
newText = ''
pos = 0
while True:
if len(newText) > L:
break
if pos >= len(text):
break
if text[pos].isdigit():
endDigit = getEndDigit(text, pos)
num = int(text[pos : endDigit])
if text[endDigit] == '(':
endPar = getEndParenthesis(text, endDigit)
insideText = uncompress(text[endDigit + 1 : endPar - 1], L - len(newText))
for _ in range(num):
newText += insideText
if len(newText) > L:
break
pos = endPar
else:
newText += (text[endDigit] * num)
pos = endDigit + 1
else:
newText += text[pos]
pos += 1
return newText
def getEndParenthesis(text, pos):
count = 0
while True:
if text[pos] == '(':
count += 1
elif text[pos] == ')':
count -= 1
if count == 0:
return pos + 1
pos += 1
def getEndDigit(text, pos):
while True:
if not text[pos].isdigit():
return pos
pos += 1
if __name__ == '__main__':
while True:
text, idx = input().strip().split()
if text == '0' and idx == '0':
break
text = uncompress(text, int(idx))
print(text[int(idx)] if len(text) > int(idx) else 0)
``` | output | 1 | 13,238 | 18 | 26,477 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,239 | 18 | 26,478 |
"Correct Solution:
```
from string import digits, ascii_uppercase
def parse(S):
S += "$"
cur = 0
res = []
def expr():
nonlocal cur
R = []; l = 0
while 1:
c = S[cur]
if c in digits:
v = number()
if S[cur] == '(':
cur += 1 # '('
R0, l0 = expr()
cur += 1 # ')'
l += v * l0
R.append((v, l0, R0))
else:
c = S[cur]
cur += 1 # 'A' ~ 'Z'
l += v
R.append((v, 1, [c]))
elif c in ascii_uppercase:
cur += 1 # 'A' ~ 'Z'
l += 1
R.append(c)
else:
break
return R, l
def number():
nonlocal cur
v = 0
while 1:
c = S[cur]
if c not in digits:
break
v = 10*v + int(c)
cur += 1 # '0' ~ '9'
return v
R, l = expr()
return R, l
def solve(res, x):
R, l = res
if l <= x:
return "0"
cur = R
while 1:
for data in cur:
if isinstance(data, str):
if x == 0:
return data
x -= 1
else:
v, l, R = data
if x < v*l:
cur = R
x %= l
break
x -= v*l
while 1:
S, x = input().split()
if S == "0":
break
x = int(x)
R, l = res = parse(S)
if l <= x:
print("0")
continue
print(solve(res, x))
``` | output | 1 | 13,239 | 18 | 26,479 |
Provide a correct Python 3 solution for this coding contest problem.
In 2300, the Life Science Division of Federal Republic of Space starts a very ambitious project to complete the genome sequencing of all living creatures in the entire universe and develop the genomic database of all space life. Thanks to scientific research over many years, it has been known that the genome of any species consists of at most 26 kinds of molecules, denoted by English capital letters (i.e. `A` to `Z`).
What will be stored into the database are plain strings consisting of English capital letters. In general, however, the genome sequences of space life include frequent repetitions and can be awfully long. So, for efficient utilization of storage, we compress N-times repetitions of a letter sequence seq into N`(`seq`)`, where N is a natural number greater than or equal to two and the length of seq is at least one. When seq consists of just one letter c, we may omit parentheses and write Nc.
For example, a fragment of a genome sequence:
> `ABABABABXYXYXYABABABABXYXYXYCCCCCCCCCC`
can be compressed into:
> `4(AB)XYXYXYABABABABXYXYXYCCCCCCCCCC`
by replacing the first occurrence of `ABABABAB` with its compressed form. Similarly, by replacing the following repetitions of `XY`, `AB`, and `C`, we get:
> `4(AB)3(XY)4(AB)3(XY)10C`
Since `C` is a single letter, parentheses are omitted in this compressed representation. Finally, we have:
> `2(4(AB)3(XY))10C`
by compressing the repetitions of `4(AB)3(XY)`. As you may notice from this example, parentheses can be nested.
Your mission is to write a program that uncompress compressed genome sequences.
Input
The input consists of multiple lines, each of which contains a character string s and an integer i separated by a single space.
The character string s, in the aforementioned manner, represents a genome sequence. You may assume that the length of s is between 1 and 100, inclusive. However, of course, the genome sequence represented by s may be much, much, and much longer than 100. You may also assume that each natural number in s representing the number of repetitions is at most 1,000.
The integer i is at least zero and at most one million.
A line containing two zeros separated by a space follows the last input line and indicates the end of the input.
Output
For each input line, your program should print a line containing the i-th letter in the genome sequence that s represents. If the genome sequence is too short to have the i-th element, it should just print a zero. No other characters should be printed in the output lines. Note that in this problem the index number begins from zero rather than one and therefore the initial letter of a sequence is its zeroth element.
Example
Input
ABC 3
ABC 0
2(4(AB)3(XY))10C 30
1000(1000(1000(1000(1000(1000(NM)))))) 999999
0 0
Output
0
A
C
M | instruction | 0 | 13,240 | 18 | 26,480 |
"Correct Solution:
```
def string(s,i):
l = 0
while i < len(s) and s[i].isalpha():
l += 1
i += 1
return i,l
def number(s,i):
n = 0
while i < len(s) and s[i].isdigit():
n = n*10 + (ord(s[i])-ord('0'))
i += 1
return i,n
def block(s,i):
if i < len(s) and s[i].isalpha():
return string(s,i)
else:
i,n = number(s,i)
if i < len(s) and s[i] == '(':
i += 1
sum = 0
while i < len(s) and s[i] != ')':
i,tmp = block(s,i)
sum += tmp
sum *= n
i += 1
return i,sum
else:
i,tmp = block(s,i)
sum = tmp*n
return i,sum
def find(s,i,j,p):
if i == j:
return 0
k,l = block(s,i)
if p < l:
if i < j and s[i].isalpha():
return s[i+p]
else:
i,n = number(s,i)
if i < j and s[i] == '(':
return find(s,i+1,k-1,p%(l//n))
else:
return find(s,i,k,p%(l//n))
else:
return find(s,k,j,p-l)
if __name__ == '__main__':
while True:
[s,p] = input().split()
p = int(p)
if s == "0" and p == 0:
break
print(find(s,0,len(s),p))
``` | output | 1 | 13,240 | 18 | 26,481 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given n strings a_1, a_2, …, a_n: all of them have the same length m. The strings consist of lowercase English letters.
Find any string s of length m such that each of the given n strings differs from s in at most one position. Formally, for each given string a_i, there is no more than one position j such that a_i[j] ≠ s[j].
Note that the desired string s may be equal to one of the given strings a_i, or it may differ from all the given strings.
For example, if you have the strings abac and zbab, then the answer to the problem might be the string abab, which differs from the first only by the last character, and from the second only by the first.
Input
The first line contains an integer t (1 ≤ t ≤ 100) — the number of test cases. Then t test cases follow.
Each test case starts with a line containing two positive integers n (1 ≤ n ≤ 10) and m (1 ≤ m ≤ 10) — the number of strings and their length.
Then follow n strings a_i, one per line. Each of them has length m and consists of lowercase English letters.
Output
Print t answers to the test cases. Each answer (if it exists) is a string of length m consisting of lowercase English letters. If there are several answers, print any of them. If the answer does not exist, print "-1" ("minus one", without quotes).
Example
Input
5
2 4
abac
zbab
2 4
aaaa
bbbb
3 3
baa
aaa
aab
2 2
ab
bb
3 1
a
b
c
Output
abab
-1
aaa
ab
z
Note
The first test case was explained in the statement.
In the second test case, the answer does not exist.
Submitted Solution:
```
import string
def isvalid(word):
for i in range(n):
differences = 0
for j in range(m):
if word[j] != strings[i][j]:
differences += 1
if differences > 1:
return False
return True
def solve():
alphabet = string.ascii_lowercase
if isvalid(strings[0]):
return strings[0]
for i in range(m):
s = strings[0].copy()
for j in range(len(alphabet)):
s[i] = alphabet[j]
if isvalid(s):
return s
return '-1'
if __name__ == '__main__':
testcases = int(input())
for i in range(testcases):
n, m = map(int, input().split())
strings = []
for j in range(n):
strings.append(list(input()))
print(''.join(solve()))
``` | instruction | 0 | 13,462 | 18 | 26,924 |
Yes | output | 1 | 13,462 | 18 | 26,925 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
#######################################
from collections import *
from collections import deque
from operator import itemgetter , attrgetter
from decimal import *
import bisect
import math
import heapq as hq
#import sympy
MOD=10**9 +7
def is_prime(n):
if n == 2 or n == 3: return True
if n < 2 or n%2 == 0: return False
if n < 9: return True
if n%3 == 0: return False
r = int(n**0.5)
# since all primes > 3 are of the form 6n ± 1
# start with f=5 (which is prime)
# and test f, f+2 for being prime
# then loop by 6.
f = 5
while f <= r:
if n % f == 0: return False
if n % (f+2) == 0: return False
f += 6
return True
def pow(a,b,m):
ans=1
while b:
if b&1:
ans=(ans*a)%m
b//=2
a=(a*a)%m
return ans
#vis=[]
#graph=[]
def ispalindrome(s):
if s[:]==s[::-1]:
return 1
return 0
dp=[]
limit=[]
v=[]
def dpdfs(u,t=-1):
dp[0][u]=0
dp[1][u]=0
for i in v[u]:
if i==t:
continue
if dp[1][i]==-1:
dpdfs(i,u)
dp[0][u]+=max(abs(limit[0][u]-limit[1][i])+dp[1][i],abs(limit[0][u]-limit[0][i])+dp[0][i])
dp[1][u] += max(abs(limit[1][u] - limit[1][i]) + dp[1][i], abs(limit[1][u] - limit[0][i]) + dp[0][i])
vis=[]
f=0
def dfs(i):
vis[i]=1
act[i]=1
for j in v[i]:
if act[j]:
f=1
#print(-1)
return -1
if vis[j]==0:
if dfs(j)==-1:
return -1
act[i]=0
ans.append(i)
return 0
from queue import PriorityQueue
def z_algorithm(s):
res = [0] * len(s)
res[0] = len(s)
i, j = 1, 0
while i < len(s):
while i + j < len(s) and s[j] == s[i + j]:
j += 1
res[i] = j
if j == 0:
i += 1
continue
k = 1
while i + k < len(s) and k + res[k] < j:
res[i + k] = res[k]
k += 1
i, j = i + k, j - k
return res
def gcd(a, b):
if a == 0:
return b
return gcd(b % a, a)
# Function to return LCM of two numbers
def lcm(a, b):
return (a / gcd(a, b)) * b
for _ in range(int(input())):
n,m=map(int,input().split())
l=[]
for i in range(2*n-1):
l.append(input())
ma={}
ans=[]
for i in range(m):
ma={}
for j in range(2*n-1):
if l[j][i] in ma:
ma.pop(l[j][i])
else:
ma[l[j][i]]=1
t=list(ma.keys())
ans.append(t[0])
print("".join(ans))
``` | instruction | 0 | 13,556 | 18 | 27,112 |
Yes | output | 1 | 13,556 | 18 | 27,113 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
######code with keroo##############
####################################
t = int(input())
for tests in range(t):
n,m = [int(i) for i in input().split(' ')]
strs = list()
hashchar=[{}for i in range(m)]
for i in range(n):
inputt = input()
strs.append(inputt)
for j in range(m):
if inputt[j] in hashchar[j].keys():
hashchar[j][inputt[j]] = hashchar[j][inputt[j]]+1
else:
hashchar[j][inputt[j]] = 1
for i in range(n-1):
inputt = input()
for j in range(m):
hashchar[j][inputt[j]] = hashchar[j][inputt[j]]-1
ans=""
for i in range(m):
for k in hashchar[i].keys():
if hashchar[i][k]>0:
ans+=k
print(ans)
``` | instruction | 0 | 13,557 | 18 | 27,114 |
Yes | output | 1 | 13,557 | 18 | 27,115 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
#DaRk DeveLopeR
import sys
#taking input as string
input = lambda: sys.stdin.readline().rstrip("\r\n")
inp = lambda: list(map(int,sys.stdin.readline().rstrip("\r\n").split()))
mod = 10**9+7; Mod = 998244353; INF = float('inf')
#______________________________________________________________________________________________________
import math
from bisect import *
from heapq import *
from collections import defaultdict as dd
from collections import OrderedDict as odict
from collections import Counter as cc
from collections import deque
from itertools import groupby
sys.setrecursionlimit(20*20*20*20+10) #this is must for dfs
def solve():
n,m=takeivr()
arr=[]
for i in range(2*n-1):
string=takesr()
arr.append(string)
ans=""
for i in range(m):
xor=0
for j in range(2*n-1):
# print(ord(arr[j][i]))
xor^=ord(arr[j][i])
# print(xor)
ans+=chr(xor)
# print()
print(ans)
def main():
global tt
if not ONLINE_JUDGE:
sys.stdin = open("input.txt","r")
sys.stdout = open("output.txt","w")
t = 1
t = takein()
#t = 1
for tt in range(1,t + 1):
solve()
if not ONLINE_JUDGE:
print("Time Elapsed :",time.time() - start_time,"seconds")
sys.stdout.close()
#---------------------- USER DEFINED INPUT FUNCTIONS ----------------------#
def takein():
return (int(sys.stdin.readline().rstrip("\r\n")))
# input the string
def takesr():
return (sys.stdin.readline().rstrip("\r\n"))
# input int array
def takeiar():
return (list(map(int, sys.stdin.readline().rstrip("\r\n").split())))
# input string array
def takesar():
return (list(map(str, sys.stdin.readline().rstrip("\r\n").split())))
# innut values for the diffrent variables
def takeivr():
return (map(int, sys.stdin.readline().rstrip("\r\n").split()))
def takesvr():
return (map(str, sys.stdin.readline().rstrip("\r\n").split()))
#------------------ USER DEFINED PROGRAMMING FUNCTIONS ------------------#
def ispalindrome(s):
return s==s[::-1]
def invert(bit_s):
# convert binary string
# into integer
temp = int(bit_s, 2)
# applying Ex-or operator
# b/w 10 and 31
inverse_s = temp ^ (2 ** (len(bit_s) + 1) - 1)
# convert the integer result
# into binary result and then
# slicing of the '0b1'
# binary indicator
rslt = bin(inverse_s)[3 : ]
return str(rslt)
def counter(a):
q = [0] * max(a)
for i in range(len(a)):
q[a[i] - 1] = q[a[i] - 1] + 1
return(q)
def counter_elements(a):
q = dict()
for i in range(len(a)):
if a[i] not in q:
q[a[i]] = 0
q[a[i]] = q[a[i]] + 1
return(q)
def string_counter(a):
q = [0] * 26
for i in range(len(a)):
q[ord(a[i]) - 97] = q[ord(a[i]) - 97] + 1
return(q)
def factorial(n,m = 1000000007):
q = 1
for i in range(n):
q = (q * (i + 1)) % m
return(q)
def factors(n):
q = []
for i in range(1,int(n ** 0.5) + 1):
if n % i == 0: q.append(i); q.append(n // i)
return(list(sorted(list(set(q)))))
def prime_factors(n):
q = []
while n % 2 == 0: q.append(2); n = n // 2
for i in range(3,int(n ** 0.5) + 1,2):
while n % i == 0: q.append(i); n = n // i
if n > 2: q.append(n)
return(list(sorted(q)))
def transpose(a):
n,m = len(a),len(a[0])
b = [[0] * n for i in range(m)]
for i in range(m):
for j in range(n):
b[i][j] = a[j][i]
return(b)
def power_two(x):
return (x and (not(x & (x - 1))))
def ceil(a, b):
return -(-a // b)
def seive(n):
a = [1]
prime = [True for i in range(n+1)]
p = 2
while (p * p <= n):
if (prime[p] == True):
for i in range(p ** 2,n + 1, p):
prime[i] = False
p = p + 1
for p in range(2,n + 1):
if prime[p]:
a.append(p)
return(a)
def pref(li):
pref_sum = [0]
for i in li:
pref_sum.append(pref_sum[-1]+i)
return pref_sum
def kadane(x): # maximum sum contiguous subarray
sum_so_far = 0
current_sum = 0
for i in x:
current_sum += i
if current_sum < 0:
current_sum = 0
else:
sum_so_far = max(sum_so_far, current_sum)
return sum_so_far
def binary_search(li, val):
# print(lb, ub, li)
ans = -1
lb = 0
ub = len(li)-1
while (lb <= ub):
mid = (lb+ub) // 2
# print('mid is',mid, li[mid])
if li[mid] > val:
ub = mid-1
elif val > li[mid]:
lb = mid+1
else:
ans = mid # return index
break
return ans
def upper_bound(li, num):
answer = -1
start = 0
end = len(li)-1
while (start <= end):
middle = (end+start) // 2
if li[middle] <= num:
answer = middle
start = middle+1
else:
end = middle-1
return answer # max index where x is not greater than num
def lower_bound(li, num):
answer = -1
start = 0
end = len(li)-1
while (start <= end):
middle = (end+start) // 2
if li[middle] >= num:
answer = middle
end = middle-1
else:
start = middle+1
return answer # min index where x is not less than num
#-----------------------------------------------------------------------#
ONLINE_JUDGE = __debug__
if ONLINE_JUDGE:
input = sys.stdin.readline
main()
``` | instruction | 0 | 13,558 | 18 | 27,116 |
Yes | output | 1 | 13,558 | 18 | 27,117 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
from collections import Counter
from collections import defaultdict
t = 0
for i in range(int(input())):
n,m = map(int,input().split())
l = []
ll = []
ans = ""
for i in range(n):
l.append(str(input()))
for i in range(n-1):
ll.append(str(input()))
t = 0
tt = 0
for i in range(m):
d = defaultdict(int)
dd = defaultdict(int)
for j in range(n):
d[l[j][i]]+=1
for j in range(n-1):
dd[ll[j][i]]+=1
for j in d:
if d[j]-dd[j]>0:
ans+=j
print(ans)
``` | instruction | 0 | 13,559 | 18 | 27,118 |
Yes | output | 1 | 13,559 | 18 | 27,119 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
import sys
input = sys.stdin.readline
t = int(input())
for i in range(t):
n, m = [int(x) for x in input().split()]
A = []
B = []
d = {I: {} for I in range(m)}
for j in range(n):
S = input()
print(S, len(S))
for I in range(m):
c = S[I]
if c not in d[I]:
d[I][c] = 0
d[I][c]+=1
for j in range(n-1):
S = input()
for I in range(m):
c = S[I]
d[I][c]-=1
if d[I][c]==0:
d[I].pop(c)
answer = ''
for I in range(m):
for c in d[I]:
answer+=chr(c)
break
print(answer)
sys.stdout.flush()
``` | instruction | 0 | 13,560 | 18 | 27,120 |
No | output | 1 | 13,560 | 18 | 27,121 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
T = int(input())
def task():
n, m = [int(x) for x in input().split()]
start, end = [], []
for _ in range(n):
start.append(input())
for _ in range(n-1):
end.append(input())
for i in range(m):
d = {}
for x in end:
v = x[i]
if v not in d:
d[v] = 1
else:
d[v] += 1
for s in start:
v = s[i]
if v in d:
if d[v] == 0:
return s
d[v] -= 1
else:
return s
return -1
for _ in range(T):
print(task())
``` | instruction | 0 | 13,561 | 18 | 27,122 |
No | output | 1 | 13,561 | 18 | 27,123 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
import sys
for _ in range(int(input())):
n,m=map(int,input().split())
gd = [0]*26
wd = [0]*26
arr1=[input() for i in range(n)]
arr2=[input() for i in range(n-1)]
for i in arr1:
for j in i:
gd[ord(j)-97] += 1
for i in arr2:
for j in i:
wd[ord(j)-97] += 1
ans = ''
# print(gd[:5])
# print(wd[:5])
for i in arr1:
cp = gd[:]
for j in i:
cp[ord(j)-97] -= 1
# print(cp[:5])
# print(wd)
if cp == wd:
ans = i
break
print(ans)
sys.stdout.flush()
``` | instruction | 0 | 13,562 | 18 | 27,124 |
No | output | 1 | 13,562 | 18 | 27,125 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AquaMoon had n strings of length m each. n is an odd number.
When AquaMoon was gone, Cirno tried to pair these n strings together. After making (n-1)/(2) pairs, she found out that there was exactly one string without the pair!
In her rage, she disrupted each pair of strings. For each pair, she selected some positions (at least 1 and at most m) and swapped the letters in the two strings of this pair at the selected positions.
For example, if m = 6 and two strings "abcdef" and "xyzklm" are in one pair and Cirno selected positions 2, 3 and 6 she will swap 'b' with 'y', 'c' with 'z' and 'f' with 'm'. The resulting strings will be "ayzdem" and "xbcklf".
Cirno then stole away the string without pair and shuffled all remaining strings in arbitrary order.
AquaMoon found the remaining n-1 strings in complete disarray. Also, she remembers the initial n strings. She wants to know which string was stolen, but she is not good at programming. Can you help her?
Input
This problem is made as interactive. It means, that your solution will read the input, given by the interactor. But the interactor will give you the full input at the beginning and after that, you should print the answer. So you should solve the problem, like as you solve the usual, non-interactive problem because you won't have any interaction process. The only thing you should not forget is to flush the output buffer, after printing the answer. Otherwise, you can get an "Idleness limit exceeded" verdict. Refer to the [interactive problems guide](https://codeforces.com/blog/entry/45307) for the detailed information about flushing the output buffer.
The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.
The first line of each test case contains two integers n, m (1 ≤ n ≤ 10^5, 1 ≤ m ≤ 10^5) — the number of strings and the length of each string, respectively.
The next n lines each contain a string with length m, describing the original n strings. All string consists of lowercase Latin letters.
The next n-1 lines each contain a string with length m, describing the strings after Cirno exchanged and reordered them.
It is guaranteed that n is odd and that the sum of n ⋅ m over all test cases does not exceed 10^5.
Hack format:
The first line should contain a single integer t. After that t test cases should follow in the following format:
The first line should contain two integers n and m.
The following n lines should contain n strings of length m, describing the original strings.
The following (n-1)/(2) lines should describe the pairs. They should contain, in the following order: the index of the first string i (1 ≤ i ≤ n), the index of the second string j (1 ≤ j ≤ n, i ≠ j), the number of exchanged positions k (1 ≤ k ≤ m), and the list of k positions that are exchanged (k distinct indices from 1 to m in any order).
The final line should contain a permutation of integers from 1 to n, describing the way the strings should be reordered. The strings will be placed in the order indices placed in this permutation, the stolen string index will be ignored.
Output
For each test case print a single line with the stolen string.
Example
Input
3
3 5
aaaaa
bbbbb
ccccc
aaaaa
bbbbb
3 4
aaaa
bbbb
cccc
aabb
bbaa
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
xbcklf
eueueu
ayzdem
ukukuk
Output
ccccc
cccc
kekeke
Note
In the first test case, "aaaaa" and "bbbbb" exchanged all positions, and "ccccc" is the stolen string.
In the second test case, "aaaa" and "bbbb" exchanged two first positions, and "cccc" is the stolen string.
This is the first test in the hack format:
3
3 5
aaaaa
bbbbb
ccccc
1 2 5 1 2 3 4 5
2 1 3
3 4
aaaa
bbbb
cccc
1 2 2 1 2
2 1 3
5 6
abcdef
uuuuuu
kekeke
ekekek
xyzklm
1 5 3 2 3 6
2 4 3 2 4 6
5 4 1 2 3
Submitted Solution:
```
alpha = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
def stringsum(a):
ans = 0
for x in a:
ans+=alpha.index(x)
return ans
t = int(input())
for i in range(t):
n,m = list(map(int,input().strip().split()))
ostrings = []
rstrings = []
osord=[]
rsord=[]
for i in range(n):
ostrings.append(input())
for i in range(n-1):
rstrings.append(input())
for x in ostrings:
osord.append(stringsum(x))
for x in rstrings:
rsord.append(stringsum(x))
print(ostrings[osord.index(sum(osord)-sum(rsord))])
``` | instruction | 0 | 13,563 | 18 | 27,126 |
No | output | 1 | 13,563 | 18 | 27,127 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,905 | 18 | 27,810 |
"Correct Solution:
```
# A
S = input()
print(S[0:3])
``` | output | 1 | 13,905 | 18 | 27,811 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,906 | 18 | 27,812 |
"Correct Solution:
```
S = input()
nik = S[0:3]
print(nik)
``` | output | 1 | 13,906 | 18 | 27,813 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,907 | 18 | 27,814 |
"Correct Solution:
```
s = str(input())
nikname = s[0:3]
print(nikname)
``` | output | 1 | 13,907 | 18 | 27,815 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,908 | 18 | 27,816 |
"Correct Solution:
```
S = input()
name = S[0:3]
print(name)
``` | output | 1 | 13,908 | 18 | 27,817 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,909 | 18 | 27,818 |
"Correct Solution:
```
S = input()
print(S[:3:])
``` | output | 1 | 13,909 | 18 | 27,819 |
Provide a correct Python 3 solution for this coding contest problem.
When you asked some guy in your class his name, he called himself S, where S is a string of length between 3 and 20 (inclusive) consisting of lowercase English letters. You have decided to choose some three consecutive characters from S and make it his nickname. Print a string that is a valid nickname for him.
Constraints
* 3 \leq |S| \leq 20
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
Print your answer.
Examples
Input
takahashi
Output
tak
Input
naohiro
Output
nao | instruction | 0 | 13,910 | 18 | 27,820 |
"Correct Solution:
```
# coding:utf-8
s = input()
print(s[:3])
``` | output | 1 | 13,910 | 18 | 27,821 |
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