qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import sys
import os

ii = lambda: int(sys.stdin.buffer.readline().rstrip())
il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]

iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]

MOD = 10 ** 9 + 7


def main():
    if os.getenv("LOCAL"):
        sys.stdin = open("input.txt", "r")

    S = list(iss())
    S = S[:-1]
    for _ in range(len(S)):
        l = len(S)
        if l % 2 == 0 and S[:l // 2] == S[l // 2:]:
            print("".join(S))
            exit()
        else:
            S = S[:-1]


if __name__ == '__main__':
    main()


Fixed code:
import sys
import os

ii = lambda: int(sys.stdin.buffer.readline().rstrip())
il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]

iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]

MOD = 10 ** 9 + 7


def main():
    if os.getenv("LOCAL"):
        sys.stdin = open("input.txt", "r")

    S = list(iss())
    S = S[:-1]
    for _ in range(len(S)):
        l = len(S)
        if l % 2 == 0 and S[:l // 2] == S[l // 2:]:
            print(len(S))
            exit()
        else:
            S = S[:-1]


if __name__ == '__main__':
    main()
Buggy code:
s=input()
for i in range(1,len(s)):
  news = s[:-1*i]
  nv = len(news)
  if nv % 2 == 1: continue
  if news[0:nv//2] == news[nv//2:]:
    print(nv//2)
    break

Fixed code:
s=input()
for i in range(1,len(s)):
  news = s[:-1*i]
  nv = len(news)
  if nv % 2 == 1: continue
  if news[0:nv//2] == news[nv//2:]:
    print(nv)
    break
Buggy code:
S = input().strip()
while len(S) > 0:
  S = S[:-1]
  mid = len(S)//2
  if S[:mid] == S[mid:]:
    print(len(S))
  	break
  

Fixed code:
S = input().strip()
while len(S) > 0:
  S = S[:-1]
  mid = len(S)//2
  if S[:mid] == S[mid:]:
    print(len(S))
    break
Buggy code:
s=input()
l=len(s)
ans=0
for i in range(2,l,2):
    tmp=s[:-i]
    if tmp[:int((l-i)/2)]==tmp[int((l-i)/2):]:
        ans=l-i
        break
    print(tmp)
    print(tmp[:int((l-i)/2)])
    print(tmp[int((l-i)/2):])
print(ans)

Fixed code:
s=input()
l=len(s)
ans=0
for i in range(2,l,2):
    tmp=s[:-i]
    if tmp[:int((l-i)/2)]==tmp[int((l-i)/2):]:
        ans=l-i
        break
print(ans)
Buggy code:
s = input()
if len(s)%2==1:
    s += '0'
s = s[:-2]
while True:
    if s[:len(s)//2] == s[len(s)//2:]:
        print(len(s[:len(s)//2]))
    s = s[:-2]

Fixed code:
s = input()
if len(s)%2==1:
    s += '0'
s = s[:-2]
while True:
    if s[:len(s)//2] == s[len(s)//2:]:
        print(len(s))
        break
    s = s[:-2]
Buggy code:
s=str(input())
flag=0
for i in range(len(s)):
  s=s[:len(s)-2*i]
  for j in range(len(s)//2):
    if s[j]!=s[len(s)-j]:
      flag=1
      break
  if flag==0:
    print(len(s))
    exit()
  else:
    flag=0
    continue

Fixed code:
s=str(input())
flag=0
for i in range(1,len(s)):
  s=s[:len(s)-2]
  for j in range(len(s)//2):
    if s[j]!=s[len(s)//2+j]:
      flag=1
      break
  if flag==0:
    print(len(s))
    exit()
  else:
    flag=0
    continue
Buggy code:
s=input()
n=len(s)
ans=0
while len(s)>0:
  s=s[:-2]
  ans+=2
  if s[:(n-ans)//2] == s[(n-ans)//2:]:
    print(ans)
    exit()

Fixed code:
s=input()
n=len(s)
ans=0
while len(s)>0:
  s=s[:-2]
  ans+=2
  if s[:(n-ans)//2] == s[(n-ans)//2:]:
    print(n-ans)
    exit()
Buggy code:
s = list(input())
for i in range(len(s)):
    del s[-1]
    s = "".join(s)
    print(s)
    if s[0:len(s)//2]*2 == s:
        print(len(s))
        break
    s = list(s)

Fixed code:
s = list(input())
for i in range(len(s)):
    del s[-1]
    s = "".join(s)
    if s[0:len(s)//2]*2 == s:
        print(len(s))
        break
    s = list(s)
Buggy code:
S = input()
while True:
  S = S[:-1]
  mid = len(S)//2
  if S[:mid] == S[mid:]:
    print(len(S))
    break
  elif S = "":
    break

Fixed code:
S = input()
while True:
  S = S[:-1]
  mid = len(S)//2
  if S[:mid] == S[mid:]:
    print(len(S))
    break
  elif S == "":
    break
Buggy code:
s=input()
for i in range(int(len(s)/2)):
    tmp=s[:-int((i+1)*2)]
    a=0
    for j in range(int(len(tmp)/2)):
        if tmp[j]==tmp[-j-1]:
            a+=1
    if a==int(len(tmp)/2):
        print(len(tmp))
        exit()

Fixed code:
s=input()
for i in range(int(len(s)/2)):
    tmp=s[:-int((i+1)*2)]
    a=0
    for j in range(int(len(tmp)/2)):
        if tmp[j]==tmp[j+int(len(tmp)/2)]:
            a+=1
    if a==int(len(tmp)/2):
        print(len(tmp))
        exit()
Buggy code:
s=list(input())

def ans(s):
    n=len(s)//2
    f=0
    for i in range(n):
        if s[i]!=s[i+n]:
            f+=1
            break
    if f==0:
        return True
    else:
        return False
      
s.pop(-1)
s.pop(-1)
kai=2
while not ans(s):
    s.pop(-1)
    s.pop(-1)
    kai+=2
print(kai)
    

Fixed code:
s=list(input())
h=len(s)
def ans(s):
    n=len(s)//2
    f=0
    for i in range(n):
        if s[i]!=s[i+n]:
            f+=1
            break
    if f==0:
        return True
    else:
        return False
      
s.pop(-1)
s.pop(-1)
kai=2
while not ans(s):
    s.pop(-1)
    s.pop(-1)
    kai+=2
print(h-kai)
Buggy code:
S = input()
if len(S) % 2 == 1:
    S = S[:-1]
else:
    S = S[:-2]
N = len(S) // 2
print(S[:N], S[N:2*N])
while S[:N] != S[N:2*N]:
    N -= 1
print(2*N)

Fixed code:
S = input()
if len(S) % 2 == 1:
    S = S[:-1]
else:
    S = S[:-2]
N = len(S) // 2
while S[:N] != S[N:2*N]:
    N -= 1
print(2*N)
Buggy code:
# coding: utf-8

import numpy as np

if __name__=="__main__":
    s = input().replace("\n", "")
    n = len(s)
    ss = ""
    if n%2 == 1:
        s = s[0:n-1]
        n = len(s)
    elif n%2 == 0:
        s = s[0:n-2]
        n = len(s)

    for i in list(range(2,n,2)):
        ss = s[0:n-i]
        m = len(ss)
        if ss[0:int(m/2)] == ss[int(m/2):m]:
            print(len(ss))
            break



Fixed code:
# coding: utf-8

import numpy as np

if __name__=="__main__":
    s = input().replace("\n", "")
    n = len(s)
    ss = ""
    if n%2 == 1:
        s = s[0:n-1]
        n = len(s)
    elif n%2 == 0:
        s = s[0:n-2]
        n = len(s)

    for i in list(range(0,n,2)):
        ss = s[0:n-i]
        m = len(ss)
        if ss[0:int(m/2)] == ss[int(m/2):m]:
            print(len(ss))
            break
Buggy code:
def isEvenStr(s):
  if len(s) % 2 == 1:
    return False
  elif s[0:int(len(s)/2)] == s[int(len(s)/2):]:
    return True
  else:
    return False

s = input()
i = 0
while not isEvenStr(s):
  s = s[:-1]
  i += 1
  if isEvenStr(s):
    print(i)

Fixed code:
def isEvenStr(s):
  if len(s) % 2 == 1:
    return False
  elif s[0:int(len(s)/2)] == s[int(len(s)/2):]:
    return True
  else:
    return False

s = input()
l = len(s)
i = 0

while not isEvenStr(s) or i == 0:
  s = s[:-1]
  i += 1
  if isEvenStr(s):
    print(l - i)
Buggy code:
s = open(0).read()

if len(s)%2:
    s = s[:-1]
else:
    s = s[:-2]

while s[:len(s)//2] != s[len(s)//2:]:
    s = s[:-2]

print(len(s))

Fixed code:
s = open(0).read().rstrip()
 
if len(s)%2:
    s = s[:-1]
else:
    s = s[:-2]
 
while s[:len(s)//2] != s[len(s)//2:]:
    s = s[:-2]
 
print(len(s))
Buggy code:
s = input()
for i in range(len(s)):
  s.pop(-1)
  if len(s) % 2 == 0:
    if s[:len(s)//2] == s[len(s)//2:]:
      print(len(s))
      break


Fixed code:
s = input()
for i in range(len(s)):
  s = s[:-1]
  if len(s) % 2 == 0:
    if s[:len(s)//2] == s[len(s)//2:]:
      print(len(s))
      break
Buggy code:
def che(s):
    lens = len(s)
    if s[:lens//2] == s[lens//2:]:
        TF = True
    else:
        TF = False
    return TF

S = input()
TF = False
ind = 0

if len(S)%2 == 1:
    S2 = S[:-2]
else:
    S2 = S[:-2]
print(S2)

while True:
    TF = che(S2)
    if TF == False:
        S2 = S2[:-2]
    else:
        ans = len(S2)
        print(ans)
        exit()


Fixed code:
def che(s):
    lens = len(s)
    if s[:lens//2] == s[lens//2:]:
        TF = True
    else:
        TF = False
    return TF

S = input()
TF = False
ind = 0

if len(S)%2 == 1:
    S2 = S[:-2]
else:
    S2 = S[:-2]
while True:
    TF = che(S2)
    if TF == False:
        S2 = S2[:-2]
    else:
        ans = len(S2)
        print(ans)
        exit()
Buggy code:
S = list(str(input()))

ans = 0
num = 0
while num < len(S):
  num += 1
  s = S[:len(S)-num]
  if len(s) % 2 == 0:
  　　if s[:len(s)/2] == s[len(s)/2:]:
        ans = len(s)
        break
print(ans)

Fixed code:
S = list(str(input()))

ans = 0
num = 0
while num < len(S):
  num += 1
  s = S[:len(S)-num]
  if len(s) % 2 == 0:
    if s[:int(len(s)/2)] == s[int(len(s)/2):]:
      ans = len(s)
      break
print(ans)
Buggy code:
s = list(input())

while True:
    s.pop()
    s.pop()
    if s[:len(s)//2] == s[len(s)//2+1:]:
        print(len(s))
        break
        

Fixed code:
s = list(input())

while True:
    s.pop()
    s.pop()
    if s[:len(s)//2] == s[len(s)//2:]:
        print(len(s))
        break
Buggy code:
s = input()
for i in range(1, len(s)):
    if((len(s)-i) % 2 == 0):
        ans = len(s) - i
        print(s[0:ans//2], s[ans//2:ans])
        if(s[0:ans//2] == s[ans//2:ans]):
            print(ans)
            break


Fixed code:
s = input()
for i in range(1, len(s)):
    if((len(s)-i) % 2 == 0):
        ans = len(s) - i
        if(s[0:ans//2] == s[ans//2:ans]):
            print(ans)
            break
Buggy code:
s = list(input())
l = len(s)//2

l2 = 0
ans = 0
print(s)
for i in range(1,len(s)//2):
  s2 = s[0:-2*i]
  print(s2)
  l2 = len(s2)//2
  if s2[0:l2]==s2[l2:]:
    ans = len(s2)
    break

print (ans)   

Fixed code:
s = list(input())
l = len(s)//2

l2 = 0
ans = 0
#print(s)
for i in range(1,len(s)//2):
  s2 = s[0:-2*i]
  #print(s2)
  l2 = len(s2)//2
  if s2[0:l2]==s2[l2:]:
    ans = len(s2)
    break

print (ans)
Buggy code:
n = input()

while n[:len(n)//2] != n[len(n)//2:]:
  n = n[:-1]

print(len(n))

Fixed code:
n = input()

n = n[:-1]

while n[:len(n)//2] != n[len(n)//2:]:
  n = n[:-1]

print(len(n))
Buggy code:
S = input()

i = 0
leng = len(S)

while 1:
    i += 1
    if S[:leng//2 - i] == S[leng//2 - i:leng - 1 - i]:
        print(leng//2 - i)
        break




Fixed code:
S = input()

i = 0
leng = len(S)

while 1:
    i += 1
    if S[:leng//2 - i] == S[leng//2 - i:leng - i * 2]:
        print((leng//2 - i) * 2)
        break
Buggy code:
if __name__ == '__main__':
    s = input()
    for i in range(1,len(s)):
        s2 = s[:len(s)-i]
        count =0
        if len(s2) % 2 ==0:
            for j in range(len(s2)// 2):
                if s2[j] == s2[len(s2) -j-1]:
                    count+=1

            if count == len(s2)//2:
                print(len(s2))
                break


Fixed code:
if __name__ == '__main__':
    s = input()
    for i in range(1,len(s)):
        s2 = s[:len(s)-i]
        count =0
        if len(s2) % 2 ==0:
            for j in range(len(s2)// 2):
                if s2[j] == s2[len(s2)// 2 + j]:
                    count+=1


            if count == len(s2)//2:
                print(len(s2))
                break
Buggy code:
s = "".join(list(reversed(input())))
n = len(s)

ans = 0
for i in range(n):
    if (n - i) % 2 == 0:
        now = s[i:]
        if now[(n-i)//2:] == now[:(n-i)//2]:
            ans = n - i
            break
print(ans)


Fixed code:
s = "".join(list(reversed(input())))
n = len(s)

ans = 0
for i in range(1, n):
    if (n - i) % 2 == 0:
        now = s[i:]
        if now[(n-i)//2:] == now[:(n-i)//2]:
            ans = n - i
            break
print(ans)
Buggy code:
S = [i for i in input()]
while True:
    S.pop(-1)
    if len(S)%2==0:
        s = ''.join(S)
        s1 = s[:(len(S)//2)]
        s2 = s[len(S)//2:]
        print(s1, s2)
        if s1 == s2:
            print(len(S))
            exit(0)
    elif len(S)==0:
        print(0)
        exit(0)


Fixed code:
S = [i for i in input()]
while True:
    S.pop(-1)
    if len(S)%2==0:
        s = ''.join(S)
        s1 = s[:(len(S)//2)]
        s2 = s[len(S)//2:]
        if s1 == s2:
            print(len(S))
            exit(0)
    elif len(S)==0:
        print(0)
        exit(0)
Buggy code:
S=input()

buf=list(S)

result=0

for i in S[-1::-1]:
    buf.remove(i)
    if(len(buf)%2==0):
        tmp="".join(buf[0:int(len(buf)/2)])
        if S.count(tmp)==2:
            result=len(buf)
            break

print(result)

Fixed code:
S=input()

buf=list(S)

result=0

for i in range(len(S)):
    del buf[-1]
    if(len(buf)%2==0):
        tmp="".join(buf[0:int(len(buf)/2)])
        if "".join(buf).count(tmp)==2:
            result=len(buf)
            break

print(result)
Buggy code:
s=input()
while len(s)>0:
    s=s[:-2]
    if s[:len(s)//2]==s[len(s)//2:]:
        print(len(s))

Fixed code:
s=input()
while len(s)>0:
    s=s[:-2]
    if s[:len(s)//2]==s[len(s)//2:]:
        print(len(s))
        exit()
Buggy code:
s = input()

s = s[:-1]
if len(s) % 2 != 0:
    s = s[:-1]


while(True):
    s1, s2 = s[0:len(s)//2], s[len(s)//2:len(s)]
    print(s1, s2)
    if s1 == s2:
        print(len(s1))
        break

    s = s[:-2]

Fixed code:
s = input()

s = s[:-1]
if len(s) % 2 != 0:
    s = s[:-1]


while(True):
    s1, s2 = s[0:len(s)//2], s[len(s)//2:len(s)]
    if s1 == s2:
        print(len(s1)*2)
        break

    s = s[:-2]
Buggy code:
s = input()

for i in reversed(range(1, int((len(s))/2+1))):
    print(s[:i])
    print(s[i:2*i])
    if(s[:i] == s[i:2*i]):
        print(2*i)


Fixed code:
s = input()

for i in reversed(range(1, int((len(s)-1)/2+1))):
    if(s[:i] == s[i:2*i]):
        print(2*i)
        break
Buggy code:
s = input()
for i in range(len(s)//2):
    s = s[:-2]
    l = len(s)
    if s[:l] == s[l:]:
        print( l * 2)
        break
    

Fixed code:
s = input()
for i in range(len(s)//2):
    s = s[:-2]
    l = len(s) // 2
    if s[:l] == s[l:]:
        print(l * 2)
        break
Buggy code:
s = input()
for i in range(1,len(s)//2):
  if s[:(n-2*i)//2] == s[(n-2*i)//2:n-2*i]:
    print(n-2*i)
    exit()

Fixed code:
s = input()
n = len(s)
for i in range(1,len(s)//2):
  if s[:(n-2*i)//2] == s[(n-2*i)//2:n-2*i]:
    print(n-2*i)
    exit()
Buggy code:
S = input()
if len(S)%2 != 0:
  S = S + '?'
for i in range(len(S)-1)[::-2]:
  if S[:i//2] == S[i//2+1:i]:
    print(i//2)
    break

Fixed code:
S = input()
if len(S)%2 != 0:
  S = S + '?'
for i in range(len(S)-1)[::-2]:
  if S[:i//2] == S[i//2:i]:
    print(i)
    break
Buggy code:
S=input()
N=len(S)
for i in range(1,N):
    print(S[:N-i])
    if len(S[:N-i])%2==0 and S[:(N-i)//2]==S[(N-i)//2:N-i]:
        print(N-i)
        quit()


Fixed code:
S=input()
N=len(S)
for i in range(1,N):
    if len(S[:N-i])%2==0 and S[:(N-i)//2]==S[(N-i)//2:N-i]:
        print(N-i)
        quit()
Buggy code:
import sys
import math
import itertools
import collections
import heapq
import re
import numpy as np
from functools import reduce

rr = lambda: sys.stdin.readline().rstrip()
rs = lambda: sys.stdin.readline().split()
ri = lambda: int(sys.stdin.readline())
rm = lambda: map(int, sys.stdin.readline().split())
rl = lambda: list(map(int, sys.stdin.readline().split()))
inf = float('inf')
mod = 10**9 + 7

s = rr()
lens = len(s)
for i in range(2, lens, 2):
  if s[:(lens - i) // 2] == s[(lens - i) // 2:lens - i]:
    print(s[:(lens - i) // 2])
    exit()
    

















Fixed code:
import sys
import math
import itertools
import collections
import heapq
import re
import numpy as np
from functools import reduce

rr = lambda: sys.stdin.readline().rstrip()
rs = lambda: sys.stdin.readline().split()
ri = lambda: int(sys.stdin.readline())
rm = lambda: map(int, sys.stdin.readline().split())
rl = lambda: list(map(int, sys.stdin.readline().split()))
inf = float('inf')
mod = 10**9 + 7

s = rr()
lens = len(s)
for i in range(2, lens, 2):
  if s[:(lens - i) // 2] == s[(lens - i) // 2:lens - i]:
    print(lens - i)
    exit()
Buggy code:
s=list(input())
from copy import copy
t=s.copy()

for i in range(len(t)):
  if len(s)%2==0 and s[:len(s)/2]==s[len(s)/2:]:
    print(len(s))
    exit()
  else:
    s.pop(-1)
    

Fixed code:
s=list(input())
from copy import copy
t=s.copy()

for i in range(len(t)):
  p=int(len(s)/2)
  if len(s)%2==0 and s[:p]==s[p:] and len(s)!=len(t):
    print(len(s))
    exit()
  else:
    s.pop(-1)
Buggy code:
S = input()

def check(s):
    n = len(s)
    if n%2 != 0:
        return False
    else:
        s1 = s[:(n//2)]
        s2 = s[(n//2):]
        if s1 == s2:
            return True
        else:
            return False

for i in range(len(S), 0, -1):
    if check(S[:i+1]):
        ans = len(S[:i])

print(ans)

Fixed code:
S = input()

def check(s):
    n = len(s)
    if n%2 != 0:
        return False
    else:
        s1 = s[:(n//2)]
        s2 = s[(n//2):]
        if s1 == s2:
            return True
        else:
            return False

for i in range(len(S)-1, 0, -1):
    if check(S[:i]):
        ans = len(S[:i])
        break

print(ans)
Buggy code:
S=input()

for i in reversed(range(len(S))):
  if i % 2 == 1:
    moji1 = S[0:i//2 + 1]
    moji2 = S[i//2 + 1: i+ 1]
    if moji1==moji2:
      print(i+1)
      break

Fixed code:
S=input()

for i in reversed(range(len(S) - 1)):
  if i % 2 == 1:
    moji1 = S[0:(i//2) + 1]
    moji2 = S[(i//2) + 1: i+ 1]
    
    if moji1==moji2:
      print(i+1)
      break
Buggy code:
S = input()
for i in range(len(S) - 1, 0, -1):
    S = S[:i]
    print(S)
    if i % 2 == 0 and S[:(i//2)] == S[(i//2):]:
        print(i)
        break

Fixed code:
S = input()
for i in range(len(S) - 1, 0, -1):
    S = S[:i]
    if i % 2 == 0 and S[:(i//2)] == S[(i//2):]:
        print(i)
        break
Buggy code:
print((lambda s:[s for s in reversed(range(len(s))) if len(s)%2==0 and s[:len(s)//2]==s[len(s)//2:]][0])(input()))

Fixed code:
print((lambda s: [len(t) for t in [s[:i] for i in reversed(range(len(s)))] if (len(t)%2==0 and t[:len(t)//2]==t[len(t)//2:])])(input())[0])
Buggy code:
s=input()
if len(s)%2==0:
  s=s[:len(s)-3]
else:
  s=s[:len(s)-2]
while True:
  l=len(s)
  if s[:l//2-1]==s[l//2:]:
    print(l)
    break
  s=s[:l-2]

Fixed code:
s=input()
if len(s)%2==0:
  s=s[:len(s)-2]
else:
  s=s[:len(s)-1]
while True:
  l=len(s)
  if s[:l//2]==s[l//2:]:
    print(l)
    break
  s=s[:l-2]
Buggy code:
s = input()

if len(s) % 2 != 0:
    s = s[:len(s)-1]

for i in range(len(s)//2):
    if s[:len(s)//2-i] == s[len(s)//2-i:len(s)-2*i]:
        print(s[:len(s)//2-i])
        exit()


Fixed code:
s = input()

if len(s) % 2 != 0:
    s = s[:len(s)-1]
else:
    s = s[:len(s)-2]

for i in range(len(s)//2):
    if s[:len(s)//2-i] == s[len(s)//2-i:len(s)-2*i]:
        print(len(s)-2*i)
        exit()
Buggy code:
S=input()
S2=S[:(len(S))//2]
while len(S)>=2:
    S=S[:-2]
    S2=S2[:-1]
    if S==S2+S2:
        print(len(S),S,S2)


Fixed code:
S=input()
S2=S[:(len(S))//2]
while len(S)>=2:
    S=S[:-2]
    S2=S2[:-1]
    if S==S2+S2:
        print(len(S))
        exit()
Buggy code:
s = input()
while len(s)!=0:
    s.pop()
    if len(s)%2==0 and s[:len(s)//2]==s[len(s)//2:]:
        print(len(s))
        exit()

Fixed code:
s = list(input())

while len(s) != 0:
  s.pop()
  if len(s)%2==0 and s[:len(s)//2]==s[len(s)//2:]:
    print(len(s))
    exit()
Buggy code:
s = input()
while True:
    s.pop()
    if len(s)%2==0 and s[:len(s)//2]==s[len(s)//2:]:
        print(len(s))
        exit()

Fixed code:
s = list(input())
while True:
    s.pop()
    if len(s)%2==0 and s[:len(s)//2]==s[len(s)//2:]:
        print(len(s))
        exit()
Buggy code:
s = input()
l = len(s)
if l == 3:
    print(s[0])
h = l//2
if l%2==0:
    for i in range(1,h):
        if s[0:h-i] == s[h-i:-2*i]:
            print(s[:-2*i])
            print(len(s[:-2*i]))
else:
    for i in range(1,h):
        if s[0:h-i+1] == s[h-i+1:-2*i+1]:
            print(s[:-2*i+1])
            print(len(s[:-2*i+1]))

Fixed code:
s = input()
l = len(s)
h = l//2
if l%2==0:
    for i in range(1,h):
        if s[0:h-i] == s[h-i:-2*i]:
            print(len(s[:-2*i]))
            break
else:
    for i in range(1,h):
        if s[0:h-i+1] == s[h-i+1:-2*i+1]:
            print(len(s[:-2*i+1]))
            break
Buggy code:
s=input()
for i in range(len(s)-1,0,-1):
  if i%2>0:
    continue
  if s[:i//2]==s[i//2:i]:
    print(s[:i//2])
    break

Fixed code:
s=input()
for i in range(len(s)-1,0,-1):
  if i%2>0:
    continue
  if s[:i//2]==s[i//2:i]:
    print(i)
    break
Buggy code:
s=list(input())
a=list(set(s))
if len(a)==1:
    print(len(s)-1)
else:
    while True:
        del s[-2:]
        if s[:(len(s)//2)]==s[(len(s)//2):]:
            print(len(s))
            exit()

Fixed code:
s=list(input())
a=list(set(s))
if len(a)==1:
    print(len(s)-2)
else:
    while True:
        del s[-2:]
        if s[:(len(s)//2)]==s[(len(s)//2):]:
            print(len(s))
            exit()
Buggy code:
s = input()
ls = len(s) // 2
while s[:ls] != s[:ls]:
  ls -= 1
  s = s[:-2]
print(ls)

Fixed code:
s = input()[:-2]
ls = len(s) // 2
while s[:ls] != s[ls:]:
  ls -= 1
  s = s[:-2]
print(ls*2)
Buggy code:
import numpy as np

S = str(input())

import numpy as np

for i in range(1,int(np.floor(len(S)/2))):
    j = int(np.floor(len(S)/2)) - i
    print(j)
    if first_str == second_str:
        num = 2*j
        break
    elif (first_str != second_str) & (j==1):
        num = 0
        break

print(num)  


Fixed code:
import numpy as np

S = str(input())

import numpy as np

for i in range(1,int(np.floor(len(S)/2))):
    j = int(np.floor(len(S)/2)) - i

    first_str = S[:j]
    second_str = S[j:2*j]
    if first_str == second_str:
        num = 2*j
        break
    elif (first_str != second_str) & (j==1):
        num = 0
        break

print(num)
Buggy code:
def ss(S: str)->int:
    n = len(S)
    ret = 0
    for i in range(n//2-2):
        if S[i+1:].startswith(S[:i+1]):
            ret = 2*(i+1)

    return ret


if __name__ == "__main__":
    S = input()
    ans = ss(S)
    print(ans)


Fixed code:
def ss(S: str)->int:
    n = len(S)
    ret = 0
    for i in range((n-1)//2):
        if S[i+1:].startswith(S[:i+1]):
            ret = 2*(i+1)

    return ret


if __name__ == "__main__":
    S = input()
    ans = ss(S)
    print(ans)
Buggy code:
s=input()
n=len(s)
print(max([n-i for i in range(0,n//2,2) if  s[:(n-i)//2]==s[(n-i)//2:-i]]))

Fixed code:
s=input()
n=len(s)
print(max([n-i for i in range(2,n,2)if s[:(n-i)//2]==s[(n-i)//2:-i]]))
Buggy code:
# -*- coding: utf-8 -*-


def main():
    """Function."""
    s = str(input())

    max_len = 0
    for i in range((len(s)-1)//2):
        if s[:i+1] * 2 == s[:(i+1)*2]:
            print(s[:i+1])
            max_len = (i + 1) * 2

    print(max_len)


if __name__ == "__main__":
    main()


Fixed code:
# -*- coding: utf-8 -*-


def main():
    """Function."""
    s = str(input())

    max_len = 0
    for i in range((len(s)-1)//2):
        if s[:i+1] * 2 == s[:(i+1)*2]:
            max_len = (i + 1) * 2

    print(max_len)


if __name__ == "__main__":
    main()
Buggy code:
s = input()
s_list = []

for i in s:
    s_list.append(i)
del s_list[-1]

while True:
    s_half = int(len(s_list)/2)
    s1 = s_list[:s_half]
    s2 = s_list[s_half:]
    print(s1)
    print(s2)
    if s1 == s2:
        print(s_half*2)
        break
    else:
        del s_list[-1]


Fixed code:
s = input()
s_list = []

for i in s:
    s_list.append(i)
del s_list[-1]

while True:
    s_half = int(len(s_list)/2)
    s1 = s_list[:s_half]
    s2 = s_list[s_half:]
    if s1 == s2:
        print(s_half*2)
        break
    else:
        del s_list[-1]
Buggy code:
S = input().rstrip()
for i in range(1, len(S)):
    a = S[:-i]
    l = len(a)
    if l % 2 == 0:
        if a[0:l//2] == a[l//2:]:
            print(a)
            break

Fixed code:
S = input().rstrip()
for i in range(1, len(S)):
    a = S[:-i]
    l = len(a)
    if l % 2 == 0:
        if a[0:l//2] == a[l//2:]:
            print(l)
            break