qyliang/CodeNanoFix huggingface dataset:
Buggy code:
def is_palindrome(str):
  i, j = 0, len(str)-1
  while i != j:
    if str[i] != str[j]:
      return False
    i += 1
    j -= 1

  return True

s = input()
n = len(s)
if is_palindrome(s) and is_palindrome(s[0:((n-1)//2)]) and is_palindrome(s[(n+3)//2-1:n]):
  print("Yes")
else:

Fixed code:
def is_palindrome(str):
  i, j = 0, len(str)-1
  while i <= j:
    if str[i] != str[j]:
      return False
    i += 1
    j -= 1

  return True

s = input()
n = len(s)
if is_palindrome(s) and is_palindrome(s[0:((n-1)//2)]) and is_palindrome(s[(n+3)//2-1:]):
  print("Yes")
else:
  print("No")
Buggy code:
S = input()
N = len(S)

tmp1, tmp2 = [], []
flag = 0
for i in range(int((N-1)/2)):
  tmp1.append(S[i])
for i in range(int((N-1)/2)):
  tmp2.append(S[-1-i])
#print(tmp1, tmp2)
if tmp1 == tmp2:
  flag = 1
  
if flag == 1:
  print('Yes')
else:
  print('No')

Fixed code:
S = input()
N = len(S)

tmp1, tmp2 = [], []
flag = 0
for i in range(int((N-1)/2)):
  tmp1.append(S[i])
for i in range(int((N+3)/2)-1,N):
  tmp2.append(S[i])
#print(tmp1, tmp2)
if tmp1 == tmp2:
  flag = 1
  
if flag == 1:
  print('Yes')
else:
  print('No')
Buggy code:
S = list(input())
print(S)
FS = S[:int((len(S) - 1)/ 2)]
BS = S[int((len(S) + 3) / 2) -1:]

r_S = list(reversed(S))
r_FS = list(reversed(FS))
r_BS = list(reversed(BS))
flag = 0

for i in range(len(S)):
    # print(r_FS, BS)
    if r_S[i] == S[i] and r_FS == FS and r_BS == BS:
        flag = 1

        continue
    else:
        print('No')
        flag = 0
        break
    
if flag == 1:
    print('Yes')

Fixed code:
S = list(input())
# print(S)
FS = S[:int((len(S) - 1)/ 2)]
BS = S[int((len(S) + 3) / 2) -1:]

r_S = list(reversed(S))
r_FS = list(reversed(FS))
r_BS = list(reversed(BS))
flag = 0

for i in range(len(S)):
    # print(r_FS, BS)
    if r_S[i] == S[i] and r_FS == FS and r_BS == BS:
        flag = 1

        continue
    else:
        print('No')
        flag = 0
        break
    
if flag == 1:
    print('Yes')
Buggy code:
S = input()
N = len(S)

N_2 = (N+1) // 2 -1

if (N+1) % 4 == 0:
  N1 = N2 = (N+1) // 4 -1
  N3 = N4 = (N1+1) * 3 -1
else:
  N1 = (N-1) // 4 -1 
  N2 = N1 + 1
  N3 = N_2 + N1 +1
  N4 = N3 + 1
  
#print(N1, N2, N3, N4)
#print(S[0:N1+1], S[N2:N_2], S[N_2+1:N3+1], S[N4:N])

if S[0:N_2] == S[N_2:N][::-1] and S[0:N1+1] == S[N2:N_2][::-1] and S[N_2+1:N3+1] == S[N4:N][::-1]:
  print('Yes')
else:
  print('No')

Fixed code:
S = input()
N = len(S)

N_2 = (N+1) // 2 -1

if (N+1) % 4 == 0:
  N1 = N2 = (N+1) // 4 -1
  N3 = N4 = (N1+1) * 3 -1
else:
  N1 = (N-1) // 4 -1 
  N2 = N1 + 1
  N3 = N_2 + N1 +1
  N4 = N3 + 1
  
#print(N1, N2, N3, N4)
#print(S[0:N1+1], S[N2:N_2], S[N_2+1:N3+1], S[N4:N], S[0:N_2], S[N_2+1:N])

if S[0:N_2] == S[N_2+1:N][::-1] and S[0:N1+1] == S[N2:N_2][::-1] and S[N_2+1:N3+1] == S[N4:N][::-1]:
  print('Yes')
else:
  print('No')
Buggy code:
import math
import sys 
s = input()
if s==s[::-1]:
    n = len(s)
    right = int((n-1)/2)
    print(right)
    tmp = s[:right]
    if tmp == tmp[::-1]:
        left = int((n+3)/2)
        tmp2 = s[left-1:]
        if tmp2 == tmp2[::-1]:
            print('Yes')
            sys.exit()
print('No')


Fixed code:
import math
import sys 
s = input()
if s==s[::-1]:
    n = len(s)
    right = int((n-1)/2)
    tmp = s[:right]
    if tmp == tmp[::-1]:
        left = int((n+3)/2)
        tmp2 = s[left-1:]
        if tmp2 == tmp2[::-1]:
            print('Yes')
            sys.exit()
print('No')
Buggy code:
def is_kaibun(st):
  f = True
  for x,y in zip(st, st[::-1]):
    if x != y:
      f = False
      break
  return f

S = input()
ans = False
if is_kaibun(S):
  if is_kaibun(S[:(len(S)-1)/2+1]):
    ans = is_kaibun(S[(len(S)+3)/2+1])
if ans:
  print('Yes')
else:
  print('No')
  

Fixed code:
def is_kaibun(st):
  f = True
  for x,y in zip(st, st[::-1]):
    if x != y:
      f = False
      break
  return f
 
S = input()
ans = False
if is_kaibun(S):
  if is_kaibun(S[:(len(S)-1)//2]):
    ans = is_kaibun(S[(len(S)+3)//2-1:])
if ans:
  print('Yes')
else:
  print('No')
Buggy code:
s=input()
n=len(s)
s1=s[:(n-1)//2]
s2=s[(n+3)-1//2:]
print(s1,s2)
if s==s[::1] and s1==s1[::-1] and s2==s2[::-1]:
    print('Yes')
else:
    print('No')

Fixed code:
s=input()
n=len(s)
s1=s[:(n-1)//2]
s2=s[(n-1)//2+1:]

if s==s[::-1] and s1==s1[::-1] and s2==s2[::-1]:
    print('Yes')
else:
    print('No')
Buggy code:
stra = input()


def hantei(s):
    for i in range(int(len(s) / 2)):
        print(i)
        if (s[i] != s[len(s) - 1 - i]):
            # print("A")
            return False
        if (int((len(s) + 3) / 2) - 1 + i < len(s) and s[(int((len(s) + 3) / 2)) - 1  + i] != s[len(s) - 1 - i]):
            # print("B")
            return False

    for i in range(int(len(s) / 4)):
        if (s[i] != s[int(len(s)/2) - 1 - i]):
            # print("C")
            return False
    return True


if(hantei(stra)):
    print("Yes")
else:
    print("No")


Fixed code:
stra = input()


def hantei(s):
    for i in range(int(len(s) / 2)):
        if (s[i] != s[len(s) - 1 - i]):
            # print("A")
            return False
        if (int((len(s) + 3) / 2) - 1 + i < len(s) and s[(int((len(s) + 3) / 2)) - 1  + i] != s[len(s) - 1 - i]):
            # print("B")
            return False

    for i in range(int(len(s) / 4)):
        if (s[i] != s[int(len(s)/2) - 1 - i]):
            # print("C")
            return False
    return True


if(hantei(stra)):
    print("Yes")
else:
    print("No")
Buggy code:
s = [i for i in list(input())]

def kaibun(t):
    flg = False
    for i in range(int((len(t) + 1) / 2)):
        if t[i] == t[len(t) - 1 - i]:
            flg = True
        else:
            flg = False
    return flg

f1 = kaibun(s)
f2 = kaibun(s[0:int((len(s) - 1) / 2)])
f3 = kaibun(s[int((len(s) + 1) / 2):len(s)])

if f1 and f2 and f3:
    print('Yes')
else:
    print('No')

Fixed code:
s = [i for i in list(input())]

def kaibun(t):
    c = 0
    for i in range(int((len(t) + 1) / 2)):
        if t[i] == t[len(t) - 1 - i]:
            c += 1
    
    if c == int((len(t) + 1) / 2):
        return True
    else:
        return False

f1 = kaibun(s)
f2 = kaibun(s[0:int((len(s) - 1) / 2)])
f3 = kaibun(s[int((len(s) + 1) / 2):len(s)])

if f1 and f2 and f3:
    print('Yes')
else:
    print('No')
Buggy code:
S=input()
ans="Yes"
if all(a==b for a,b in zip(S,reversed(S))):
    if all(a==b for a,b in zip(S,reversed(S[:N//2]))):
            pass
    else:
        ans="No"
else:
    ans="No"
print(ans)


Fixed code:
S=input()
ans="Yes"
if all(a==b for a,b in zip(S,reversed(S))):
    if all(a==b for a,b in zip(S,reversed(S[:len(S)//2]))):
            pass
    else:
        ans="No"
else:
    ans="No"
print(ans)
Buggy code:
a = input()
if a == a[::-1]:
    b = a[:int((len(a) - 1) / 2)]
    c = a[int((len(a) + 3) / 2):]
    if b == b[::-1] and c == c[::-1]:
        print('Yes')
        exit(0)
print('No')


Fixed code:
a = input()
if a == a[::-1]:
    b = a[:int((len(a) - 1) / 2)]
    c = a[int((len(a) + 3) / 2) - 1:]
    if b == b[::-1] and c == c[::-1]:
        print('Yes')
        exit(0)
print('No')
Buggy code:
def check(s):
  n=len(s)
  if s!==s[::-1]:
    return "No"
  temp=s[:(n-1)//2]
  if temp!=temp[::-1]:
    return "No"
  temp=s[((n+3)//2)-1:]
  if temp!=temp[::-1]:
    return "No"
  return "Yes"
s=input()
print(check(s))

Fixed code:
def check(s):
  n=len(s)
  if s!=s[::-1]:
    return "No"
  temp=s[:(n-1)//2]
  if temp!=temp[::-1]:
    return "No"
  temp=s[((n+3)//2)-1:]
  if temp!=temp[::-1]:
    return "No"
  return "Yes"
s=input()
print(check(s))
Buggy code:
def main():
    #from sys import stdin, setrecursionlimit
    #setrecursionlimit(10**9)
    #r = input()
    #n = int(input())
    #a, b = map(int, input().split())
    #s, y = input().split()
    #a = input().split()
    #a = list(map(int, input().split()))
    #a = [list(input().split()) for i in range(n)]
    #a = [int(input()) for i in range(n)]
    #a = [list(map(int, input().split())) for i in range(n)]
    #a = [int(s) - 1 for s in input().split()]
    #l=[int(input()) for _ in range(int(input()))]
    #res = 0
    s=list(input())
    n=len(s)
    l1=s[:(n-1)//2]
    l2=s[(n+3)//2-1:]
    print(l1,l2)
    if s==s[::-1] and l1==l1[::-1] and l2==l2[::-1]:
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':
    main()



Fixed code:
def main():
    #from sys import stdin, setrecursionlimit
    #setrecursionlimit(10**9)
    #r = input()
    #n = int(input())
    #a, b = map(int, input().split())
    #s, y = input().split()
    #a = input().split()
    #a = list(map(int, input().split()))
    #a = [list(input().split()) for i in range(n)]
    #a = [int(input()) for i in range(n)]
    #a = [list(map(int, input().split())) for i in range(n)]
    #a = [int(s) - 1 for s in input().split()]
    #l=[int(input()) for _ in range(int(input()))]
    #res = 0
    s=list(input())
    n=len(s)
    l1=s[:(n-1)//2]
    l2=s[(n+3)//2-1:]
    if s==s[::-1] and l1==l1[::-1] and l2==l2[::-1]:
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':
    main()
Buggy code:
def palindrome(str):
  n = len(str)
  for i in range(n // 2):
    if str[i] != str[n - 1 - i]:
      return False
  return True

str = input()
is_palindrome = palindrome(str)
n = len(str)
if n % 2 == 1:
  is_palindrome = palindrome(str[:(n - 1) // 2]) and palindrome(str[(n + 3) // 2:])

print("Yes" if is_palindrome else "No")

Fixed code:
def palindrome(str):
  n = len(str)
  for i in range(n // 2):
    if str[i] != str[n - 1 - i]:
      return False
  return True

str = input()
is_palindrome = palindrome(str)
n = len(str)
if is_palindrome and n % 2 == 1:
  is_palindrome = palindrome(str[:(n - 1)// 2]) and palindrome(str[(n + 1) // 2:])

print("Yes" if is_palindrome else "No")
Buggy code:
S = input()
N = len(S)
isPal = lambda s: s == s[::-1]
print("Yes" if isPal(S[:(N-1)//2]) and isPal(S[(N-1)//2:]) else "No")

Fixed code:
S = input()
N = len(S)
isPal = lambda s: s == s[::-1]
print("Yes" if isPal(S) and isPal(S[:(N-1)//2]) and isPal(S[(N+1)//2:]) else "No")
Buggy code:
S = input()
S_rvs = S[::-1]
N = len(S)
left = int((N-1)/2-1)
right = int((N+3)/2-1)

if S == S_rvs and S[:left] == S_rvs[right:] and S[right:] == S_rvs[:left]:
    print("Yes")
else:
    print("No")

Fixed code:
S = input()
S_rvs = S[::-1]
N = len(S)
left = int((N-1)/2)
right = int((N+3)/2-1)

if S == S_rvs and S[:left] == S_rvs[right:] and S[right:] == S_rvs[:left]:
    print("Yes")
else:
    print("No")
Buggy code:
s = input()
l = s[:(len(s)-1)//2:]
r = s[(len(s)+1)//2:]
if a == b and a == a[::-1]:
     print("Yes")
else:
     print("No")

Fixed code:
s = input()
a = s[:(len(s)-1)//2:]
b = s[(len(s)+1)//2:]
if a == b and a == a[::-1]:
     print("Yes")
else:
     print("No")
Buggy code:
def isKaibun(s):
  for a, b in zip(s, reversed(s)):
    if a != b:
      return False
  return True

S = list(input())
N = len(S)
if isKaibun(S[:(N-1)//2]) and isKaibun(S[(N+3)//2:]):
  print("Yes")
else:
  print("No")


Fixed code:
def isKaibun(s):
  for a, b in zip(s, reversed(s)):
    if a != b:
      return False
  return True

S = list(input())
N = len(S)
if isKaibun(S) and isKaibun(S[:(N-1)//2]) and isKaibun(S[(N+1)//2:]):
  print("Yes")
else:
  print("No")
Buggy code:
#from scipy.special import comb
#from math import factorial

S = input()
S1 = S[:int((len(S)-1)/2)]
S2 = S[int((len(S)+1)/2):]

if S == S[::-1]:
  if S1 == S1[::-1]:
    if S2 == S2[::-1]:
      print("Yes")
else:
  print("No")

Fixed code:
#from scipy.special import comb
#from math import factorial
 
S = input()
S1 = S[:int((len(S)-1)/2)]
S2 = S[int((len(S)+1)/2):]

if S == S[::-1]:
  if S1 == S1[::-1]:
    if S2 == S2[::-1]:
      print("Yes")
    else:
      print("No")
  else:
    print("No")
else:
  print("No")
Buggy code:
s = str(input())
n = len(s)
if n%2==0:
    print("No")
else:
    a = s[:int((n-1)/2)]
    b = s[int((n+1)/2):]
    x = a[::-1]
    y = b[::-1]
    print(a)
    print(b)

    l = (n+1)/4
    # print(l)
    c = 0
    for i in range(int(l)):
        if (a[i]!=x[i])or (b[i]!=y[i]):
            print("No")
            c =1
            break
if(c==0):
    print("Yes")
        

Fixed code:
s = str(input())
m = s[::-1]
n = len(s)
c=0
for i in range(int((n-1)/2)):
    if (s[i]!=m[i]):
        print("No")
        c=1
        break

if c==0:
    a = s[:int((n-1)/2)]
    b = s[int((n+1)/2):]
    x = a[::-1]
    y = b[::-1]
    # print(a)
    # print(b)

    l = (n+1)/4
        # print(l)

    for i in range(int(l)):
        if (a[i]!=x[i])or (b[i]!=y[i]):
            print("No")
            c =1
            break
    if(c==0): 
        print("Yes")
Buggy code:
my_string = input("Type your word: ")
my_string = my_string.casefold()
if ((len(my_string)) < 3 or (len(my_string)) > 100):
    #print(len(my_string))
    print("no")
    quit()

reversed_string = reversed(my_string)

n = len(my_string)
#defining string [0:(n-1)/2]
first_chars = my_string[:int((n-1)/2)]
reversed_first_chars = reversed(first_chars)

#defining string [((n+3)/2):n-1]
last_chars = my_string[int((n+3)/2)-1:]
reversed_last_chars = reversed(last_chars)
#print(type(first_chars), first_chars)
#print(last_chars)
#print(n)

#checking if S is a palindrome
if list(my_string) == list(reversed_string):
    #checking if it is a strong palindrome
    if (list(first_chars) == list(reversed_first_chars)):
        if (list(last_chars) == list(reversed_last_chars)):
            print("yes")
        else:
            print("no")
    else:
        print("no")
#if it is not a palindrome at all
else:
    print("no")

Fixed code:
#my_string = input("Type your word: ")
my_string = input()
my_string = my_string.casefold()
if ((len(my_string)) < 3 or (len(my_string)) > 100):
    #print(len(my_string))
    print("No")
    quit()

reversed_string = reversed(my_string)

n = len(my_string)
#defining string [0:(n-1)/2]
first_chars = my_string[:int((n-1)/2)]
reversed_first_chars = reversed(first_chars)

#defining string [((n+3)/2):n-1]
last_chars = my_string[int((n+3)/2)-1:]
reversed_last_chars = reversed(last_chars)
#print(type(first_chars), first_chars)
#print(last_chars)
#print(n)

#checking if S is a palindrome
if list(my_string) == list(reversed_string):
    #checking if it is a strong palindrome
    if (list(first_chars) == list(reversed_first_chars)):
        if (list(last_chars) == list(reversed_last_chars)):
            print("Yes")
        else:
            print("No")
    else:
        print("No")
#if it is not a palindrome at all
else:
    print("No")
Buggy code:
str = input()

str1 = str[::-1]
a = str1 == str
str2 = str[:int((len(str)-1)/2)]
str3 = str2[::-1]
b = str3 == str2
str4 = str[int((len(str)+3)/2)-1:]
str5 = str4[::-1]
c = str5 == str4
print(a, b, c)
if a and b and c:
    print("Yes")
else:
    print("No")

Fixed code:
str = input()

str1 = str[::-1]
a = str1 == str
str2 = str[:int((len(str)-1)/2)]
str3 = str2[::-1]
b = str3 == str2
str4 = str[int((len(str)+3)/2)-1:]
str5 = str4[::-1]
c = str5 == str4
if a and b and c:
    print("Yes")
else:
    print("No")
Buggy code:
# B - String Palindrome
def main():
    S = input().rstrip()
    mid = len(S) // 2 + 1
    left, right = S[:mid], S[mid + 1 :]
    is_palindrome = S == S[::-1]
    check_left = left == left[::-1]
    check_right = right == right[::-1]
    print("Yes" if is_palindrome and check_left and check_right else "No")


if __name__ == "__main__":
    main()


Fixed code:
# B - String Palindrome
def main():
    S = input().rstrip()
    N = len(S)
    left, right = S[: (N - 1) // 2], S[(N + 3) // 2 - 1:]
    is_palindrome = S == S[::-1]
    check_left = left == left[::-1]
    check_right = right == right[::-1]
    print("Yes" if is_palindrome and check_left and check_right else "No")


if __name__ == "__main__":
    main()
Buggy code:
S = input()
N = len(S)
if (S == S[::-1]) and (S[0:(N-1)//2] == S[0:(N-1)//2+1:-1]) and (S[(N+3)//2-1:] == S[(N+3)//2-1::-1]):
    print('Yes')
else:
    print('No')

Fixed code:
S = input()
N = len(S)
S1 = S[0:(N-1)//2]
S2 = S[(N+3)//2-1]

if (S == S[::-1]) and (S1 == S1[::-1]) and (S2 == S2[::-1]):
    
    print('Yes')
else:
    print('No')
Buggy code:
def palindrome(x):
    reverse = x[::-1]
    for i in range(len(x)):
        if (x[i] != reverse[i]):
            return False
    return True

c = input()
l = len(c)
["No","Yes"][palindrome(c) & palindrome(c[:(l-1)//2])& palindrome(c[(l+2)//2:])]

Fixed code:
def palindrome(x):
    reverse = x[::-1]
    for i in range(len(x)):
        if (x[i] != reverse[i]):
            return False
    return True

c = input()
l = len(c)
print(["No","Yes"][palindrome(c) & palindrome(c[:(l-1)//2])& palindrome(c[(l+2)//2:])])
Buggy code:
s = list(str(input()))

ans = 0
n = len(s)
s1 = list(reversed(s))
if s != s1:
    ans = 1

s2 = s[0:(n-1)//2]
s3 = list(reversed(s2))
if s2 != s3:
    ans = 1

s4 = s[(n+2)//2:n]
s5 = list(reversed(s4))
if s4 != s5:
    ans = 1

print(s,s1,s2,s3,s4,s5)

if ans == 0:
    print('Yes')
else:
    print('No')

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

ans = 0
n = len(s)
s1 = list(reversed(s))
if s != s1:
    ans = 1

s2 = s[0:(n-1)//2]
s3 = list(reversed(s2))
if s2 != s3:
    ans = 1

s4 = s[(n+2)//2:n]
s5 = list(reversed(s4))
if s4 != s5:
    ans = 1

if ans == 0:
    print('Yes')
else:
    print('No')
Buggy code:
s = str(input())
n = len(s)
s1 = s[:(n-1)/2]
if s != s[::-1] or s1 != s1[::-1]:
  print('No')
else:
  print('Yes')

Fixed code:
s = str(input())
n = len(s)
s1 = s[:int((n-1)/2)]
if s != s[::-1] or s1 != s1[::-1]:
  print('No')
else:
  print('Yes')
Buggy code:

def reverse(s): 
    return s[::-1] 
  
def isPalindrome(s): 
    
    rev = reverse(s) 
  
    if (s == rev): 
        return True
    return False
    
s=input()
n = len(s)
p=int(round((n-1)/2))
q=int(round((n+3)/2))
ans = isPalindrome(s)  
t1=[]
t2=[]
ans1=isPalindrome(t1)
ans2=isPalindrome(t2)
for i in range(0,p):
    t1.append(s[i])
for i in range(q-1,n):
    t2.append(s[i])    


if (ans==1 and ans1==1 and ans2==1):
    print ("Yes")
    
else:
    print("No")
    

Fixed code:

def reverse(s): 
    return s[::-1] 
  
def isPalindrome(s): 
    
    rev = reverse(s) 
  
    if (s == rev): 
        return True
    return False
def listToString(s):  

    str1 = ""  
    for ele in s:  
        str1 += ele   
   
    return str1   
    
s=input()
n = len(s)
p=int(round((n-1)/2))
q=int(round((n+3)/2))
ans = isPalindrome(s)


t1=[]
t2=[]

for i in range(0,p):
    t1.append(s[i])
for i in range(q-1,n):
    t2.append(s[i])    

ans1=isPalindrome(listToString(t1))
ans2=isPalindrome(listToString(t2))
if (ans==1 and ans1==1 and ans2==1):
    print ("Yes")
    
else:
    print("No")
Buggy code:
s = input()
n = len(s)
ans = "Yes"
half = int((n -1) / 2)
half2 = int((n+2)/2)
a = s[:half]
a_2 = s[half+1:n]
a_2 = a_2[::-1]
print(a, a_2)
if a != a_2:
    ans = "No"
else:
    if (len(a)%2) == 0:
        a_half = int(len(a)/2)
        a_3 = a[0:a_half]
        a_4 = a[a_half:len(a)]
        a_4 = a_4[::-1]
    else:
        a_half = int((len(a)+1)/2)
        a_3 = a[0:a_half]
        a_4 = a[a_half-1:len(a)]
        a_4 = a_4[::-1]
    print(a_3, a_4)
    if a_3 != a_4:
        ans = "No"
    else:
        b = s[half2:n]
        if (len(b)%2) == 0:
            b_half = int(len(b)/2)
            b_2 = b[0:b_half]
            b_3 = b[b_half:len(b)]
            b_3 = b_3[::-1]
        else:
            b_half = int((len(b)+1)/2)
            b_2 = b[0:b_half]
            b_3 = b[b_half-1:len(b)]
            b_3 = b_3[::-1]            
        print(b_2, b_3)
        if b_2 != b_3:
            ans = "No"
print(ans)

Fixed code:
s = input()
n = len(s)
ans = "Yes"
half = int((n -1) / 2)
half2 = int((n+2)/2)
a = s[:half]
a_2 = s[half+1:n]
a_2 = a_2[::-1]
if a != a_2:
    ans = "No"
else:
    if (len(a)%2) == 0:
        a_half = int(len(a)/2)
        a_3 = a[0:a_half]
        a_4 = a[a_half:len(a)]
        a_4 = a_4[::-1]
    else:
        a_half = int((len(a)+1)/2)
        a_3 = a[0:a_half]
        a_4 = a[a_half-1:len(a)]
        a_4 = a_4[::-1]
    if a_3 != a_4:
        ans = "No"
    else:
        b = s[half2:n]
        if (len(b)%2) == 0:
            b_half = int(len(b)/2)
            b_2 = b[0:b_half]
            b_3 = b[b_half:len(b)]
            b_3 = b_3[::-1]
        else:
            b_half = int((len(b)+1)/2)
            b_2 = b[0:b_half]
            b_3 = b[b_half-1:len(b)]
            b_3 = b_3[::-1]            
        if b_2 != b_3:
            ans = "No"
print(ans)
Buggy code:
s = input()

def check(s):
  if len(s) == 1 or len(s) == 0:
    return True
  if s[0]!=s[-1]:
    return False
  return check(s[1:-1])

mid = len(s)//2

if check(s) and check(s[0:mid]) and check(s[mid:]):
  print("Yes")
else:
  print("No")


Fixed code:
s = input()

def check(s):
  if len(s) == 1 or len(s) == 0:
    return True
  if s[0]!=s[-1]:
    return False
  return check(s[1:-1])

mid = len(s)//2

if check(s) and check(s[0:mid]) and check(s[mid+1:]):
  print("Yes")
else:
  print("No")
Buggy code:
S = input()
N = len(S)
T = list(S)
i = 0
chack = 0

while i != int((N-1)/2):
    if T[i] != T[N-i-1]:
        chack = 1
        break
    else:
        i = i+1

i = 0
while i != int((N-1)/4):
    if T[i] != T[int((N-1)/2-i-1)]:
        chack = 1
        break
    else:
        i = i+1

i = 0
while i != int((N-1)/4):
    if T[int((N+1)/2)+i] != T[N-i-1]:
        chack = 1
        break
    else:
        i = i+1

if chack == 0:
    print("yes")
else:
    print("No")


Fixed code:
S = input()
N = len(S)
T = list(S)
i = 0
chack = 0

while i != int((N-1)/2):
    if T[i] != T[N-i-1]:
        chack = 1
        break
    else:
        i = i+1

i = 0
while i != int((N-1)/4):
    if T[i] != T[int((N-1)/2-i-1)]:
        chack = 1
        break
    else:
        i = i+1

i = 0
while i != int((N-1)/4):
    if T[int((N+1)/2)+i] != T[N-i-1]:
        chack = 1
        break
    else:
        i = i+1

if chack == 0:
    print("Yes")
else:
    print("No")
Buggy code:
S = input()
n = len(S)
isKaibun = True
for i in range(n//2):
    if(S[i] != S[n-i-1] or S[i] != S[n//2-i-1] or S[n//2+i+a1] != S[n//2-i-1]):
        isKaibun = False
        break
if(isKaibun):
    print("Yes")
else:
    print("No")

Fixed code:
S = input()
n = len(S)
isKaibun = True
for i in range(n//2):
    if(S[i] != S[n-i-1] or S[i] != S[n//2-i-1] or S[n//2+i+1] != S[n//2-i-1]):
        isKaibun = False
        break
if(isKaibun):
    print("Yes")
else:
    print("No")
Buggy code:
S = input()
N = int(len(S))
S_a = S[:(N-1)//2]
S_b = S[(N+3)//2:]
#print(S)
if S == S[::-1] and S_a == S_a[::-1] and S_b == S_b[::-1]:
    print("Yes")
else:
    print("No")

Fixed code:
S = input()
N = int(len(S))
S_a = S[:(N-1)//2]
S_b = S[(N+1)//2:]
#print(S)
if S == S[::-1] and S_a == S_a[::-1] and S_b == S_b[::-1]:
    print("Yes")
else:
    print("No")
Buggy code:
S = input()
if len(S) < 7:
	print("No")
	exit()
for i in range(len(S)//2):
	if S[i] != S[-i-1]:
		print("No")
		exit()
S_front = S[:(len(S)//2)]
print(S_front)
for i in range(len(S_front)//2):
	if S_front[i] != S_front[-i-1]:
		print("No")
		exit()
S_back = S[(len(S)+1)//2:]
print(S_back)
for i in range(len(S_back)//2):
	if S_back[i] != S_back[-i-1]:
		print("No")
		exit()
print("Yes")

Fixed code:
S = input()
for i in range(len(S)//2):
	if S[i] != S[-i-1]:
		print("No")
		exit()
S_front = S[:(len(S)//2)]
for i in range(len(S_front)//2):
	if S_front[i] != S_front[-i-1]:
		print("No")
		exit()
S_back = S[(len(S)+1)//2:]
for i in range(len(S_back)//2):
	if S_back[i] != S_back[-i-1]:
		print("No")
		exit()
print("Yes")
Buggy code:
#B
S = input()
n = len(S)
a = list(S)
reva = a[n::-1]
sub1 = a[0:(int((n-1)/2))]
sub2 = a[int((n+3)/2-1):]
print([sub1, sub2])
if a == reva and sub1 == sub1[len(sub1)::-1] and sub2 == sub2[len(sub2)::-1]:
    print('Yes')
else:
    print('No')


Fixed code:
#B
S = input()
n = len(S)
a = list(S)
reva = a[n::-1]
sub1 = a[0:(int((n-1)/2))]
sub2 = a[int((n+3)/2-1):]
if a == reva and sub1 == sub1[len(sub1)::-1] and sub2 == sub2[len(sub2)::-1]:
    print('Yes')
else:
    print('No')