qyliang/CodeNanoFix huggingface dataset:
Buggy code:
N = int(input())

C = N//4
D = N//7
count = 0
for c in range(1,C):
    for d in range(1,D):
        if (4*c) + (7*d) == N:
            count += 1

if count > 0:
    print("Yes")
else:
    print("No")

Fixed code:
N = int(input())

C = N//4
D = N//7
count = 0
for c in range(0,C+1):
    for d in range(0,D+1):
        if (4*c) + (7*d) == N:
            count += 1

if count > 0:
    print("Yes")
else:
    print("No")
Buggy code:
N=int(input())
#number of cakes
if all( (N - 4*i) % 7 != 0 for i in range(N/4)):
    print("No")
else:
    print("Yes")

Fixed code:
N=int(input())
#number of cakes
if all( (N - 4*i) % 7 != 0 for i in range(N//4 + 1)):
    print("No")
else:
    print("Yes")
Buggy code:
n=int(input())
flag=0
if i in range(26):
    if j in  range(15):
        total=4*i+j*7
        if total==n:
            flag+=1
            break
if flag==0:
    print('No')
else:
    print('Yes')
        









Fixed code:
n=int(input())
flag=0
for i in range(26):
    for j in  range(15):
        total=4*i+j*7
        if total==n:
            flag+=1
            break
if flag==0:
    print('No')
else:
    print('Yes')
Buggy code:
n = int(input())
for i in range(25):
    for j in range(14):
        if n == 4*i + 7*j:
            print("Yes")
            break
else:
    print("No")

Fixed code:
n = int(input())
for i in range(25):
    for j in range(14):
        if n == 4*i + 7*j:
            print("Yes")
            exit()
else:
    print("No")
Buggy code:
n = int(input())
ans = "No"

for i in range(100):
	for j in range(100):
		if i*7+j*4 == N:
			ans = "Yes"

print(ans)

Fixed code:
N = int(input())
ans = "No"

for i in range(100):
    for j in range(100):
        if i*7+j*4==N:
            ans = "Yes"
            
print (ans)
Buggy code:
N = int(input())
print('Yes' if any(i * 4 + j * 7 for i in range(100) for j in range(100)) else 'No')

Fixed code:
N = int(input())
print('Yes' if any(i * 4 + j * 7 == N for i in range(100) for j in range(100)) else 'No')
Buggy code:
N = int(input())

cake = 4
dou = 7
dec = False

for i in range(26):
    for j in range(15):
        price = cake * i + dou * j
        if price == N:
            print("Yes")
            dec = True
            break
if not dec:
    print("No")

Fixed code:
N = int(input())
 
cake = 4
dou = 7
dec = False
 
for i in range(26):
    for j in range(15):
        price = cake * i + dou * j
        if price == N:
            dec = True

if dec:
    print("Yes")
else:
  	print("No")
Buggy code:
n = int(input())

for i in range(n//7):
	if n%4==0:
		print("Yes")
		break
	n -=7
else:
	print("No")


Fixed code:
n = int(input())

for i in range(n//7+1):
	if n%4==0:
		print("Yes")
		break
	n -=7
else:
	print("No")
Buggy code:
N = int(input())

flag = False
for i in range(0,30):
  for j in range(0,30):
  	if i * 4 + j * 7 == N:
      flag = True

if flag == True:
  print('Yes')
else:
  print('No')

Fixed code:
N = int(input())

flag = False
for i in range(0,30):
  for j in range(0,30):
    if i * 4 + j * 7 == N:
      flag = True

if flag == True:
  print('Yes')
else:
  print('No')
Buggy code:
n = int(input())

for i in range(n // 4):
    for j in range(n // 7):
        if i * 4 + j * 7 == n:
            print('Yes')
            exit()
print('No')


Fixed code:
n = int(input())

for i in range(n):
    for j in range(n):
        if i * 4 + j * 7 == n:
            print('Yes')
            exit()
print('No')
Buggy code:
N = int(input())
x = N//7
count = 0
for i in range(1,x+1):
  y = N - 7*x
  if y % 4 == 0:
    count += 1
if count != 0:
  print('Yes')
else:
  print('No')

Fixed code:
N = int(input())
x = N//7
count = 0
for i in range(x+1):
  y = N - 7*i
  if y % 4 == 0:
    count += 1
if count != 0:
  print('Yes')
else:
  print('No')
Buggy code:
n = int(input())
ans = "No"
for i in range(n // 7):
  if (n - (i+1)*7) % 4 == 0:
    ans == "Yes"
print(ans)

Fixed code:
n = int(input())
ans = "No"
for i in range(n // 7 + 1):
  if (n - i*7) % 4 == 0:
    ans = "Yes"
    break
print(ans)
Buggy code:
a = int(input())
b = [0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100]
c = [0,7,14,21,28,35,42,49,56,63,70,77,84,91,98]
d = 0
if a < 4:
	print("No")
else:
	for i in range(len(b)):
		for j in range(len(c)):
			if b[i] + c[j] >= 101:
				break

			if b[i] + c[j] == a:
				print("Yes")
				d = 1
				break
		if d == 1:
			break
if d == 0:
	print("No")


Fixed code:
a = int(input())
b = [0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100]
c = [0,7,14,21,28,35,42,49,56,63,70,77,84,91,98]
d = 0

for i in range(len(b)):
	for j in range(len(c)):
		if b[i] + c[j] == a:
			print("Yes")
			d = 1
			break
	if d == 1:
		break
if d == 0:
	print("No")
Buggy code:
class Solver(object):
    def __init__(self):
        self.valids = self._generate_valid_list()
        self.n = int(input())

    def solve(self):
        if self.n in self.valids:
            print("Yes")
        else:
            print("No")

    def _generate_valid_list(self):
        valids = set()
        for cake in range(26): # 0 .. 25
            if cake == 1:
                continue
            for donut in range(16):  # 0 .. 15
                if donut == 1:
                    continue
                valids.add( (donut*7) + (cake*4) )
        return valids
                
                


if __name__ == "__main__":
    s = Solver()
    s.solve()

Fixed code:
class Solver(object):
    def __init__(self):
        self.valids = self._generate_valid_list()
        self.n = int(input())

    def solve(self):
        if self.n in self.valids:
            print("Yes")
        else:
            print("No")

    def _generate_valid_list(self):
        valids = set()
        for cake in range(26): # 0 .. 25
            for donut in range(16):  # 0 .. 15
                valids.add( (donut*7) + (cake*4) )
        return valids


if __name__ == "__main__":
    s = Solver()
    s.solve()
Buggy code:
N = int(input())
flag = 0

if N < 4:
    print("No")

else:
    for i in range(N//4 + 1):
        if (N - 4*i) % 7 == 0:
            print("Yes")
            flag = 1
            break

        else:
            continue 

if flag == 0:
    print("No")

Fixed code:
N = int(input())
flag = 0
cou = N//4 +1

if N < 4:
    print("No")

else:
    for i in range(cou):
        N2 = N - 4*i

        if N2 < 0:
            break

        elif N2 % 7 == 0:
            print("Yes")
            flag = 1
            break

        else:
            continue 

    if flag == 0:
        print("No")
Buggy code:
N = int(input())

for i in range(26):
  if (N-i*4)% 7 == 0:
    print("Yes")
    exit()
print("No")

Fixed code:
N = int(input())

for i in range(26):
  if (N-i*4)% 7 == 0 and N>= i*4:
    print("Yes")
    exit()
print("No")
Buggy code:
N = int(input())

count = 0
for i in range(26):
    for j in range(15):
        if 4*i+7*j == N:
            print("Yes")
            print(i,j)
            count += 1
if count == 0:
    print("No")


Fixed code:
N = int(input())

count = 0
for i in range(26):
    for j in range(15):
        if 4*i+7*j == N:
        	count = 1
if count == 1:
    print("Yes")
else:
	print("No")
Buggy code:
n = int(input())
flag = 0
for i in range(25):
  for j in range(14):
    if n - 4*i -7*j == 0:
      flag += 1
      break

if flag == 1:
  print("Yes")
else :
  print("No")

Fixed code:
n = int(input())
flag = 0

for i in range(14):
  for j in range(25):
    if 7*i + 4*j == n:
      flag = 1
      break

if flag:
  print('Yes')
else:
  print('No')
Buggy code:
n = int(input())
flag = 0
for i in range(15):
  for j in range(26):
    if 7*i - 4*j == n:
      flag = 1
      exit

if flag == 1:
  print("Yes")
else :
  print("No")

Fixed code:
n = int(input())
flag = 0
for i in range(15):
  for j in range(26):
    if 7*i + 4*j == n:
      flag = 1
      exit

if flag == 1:
  print("Yes")
else :
  print("No")
Buggy code:
n = int(input())
seven = int(n // 7)
four = int(n // 4)
count = 0
for i in range(seven):
    for j in range(four):
        if 7 * i + 4 * j == n:
            count += 1
if count == 0:
    print('No')
else:
    print('Yes')

Fixed code:
n = int(input())
seven = int(n // 7)
four = int(n // 4)
count = 0
for i in range(seven + 1):
    for j in range(four + 1):
        if 7 * i + 4 * j == n:
            count += 1
if count == 0:
    print('No')
else:
    print('Yes')
Buggy code:
n=int(input())
for i in range(n//4+1):
    for j in range((n-4*i)//7+1):
        print(4*i, 7*j)
        if 4*i+7*j==n:
            print('Yes')
            exit()
print('No')

Fixed code:
n=int(input())
for i in range(n//4+1):
    for j in range((n-4*i)//7+1):
        if 4*i+7*j==n:
            print('Yes')
            exit()
print('No')
Buggy code:
n = int(input())
r = n // 4
for i in range(r+1):
  for j in range(r+1):
    if 4*i + 7*j == n:
      flag = True
      break
  if flag:
    print('Yes')
    break
  else:
    print('No')

Fixed code:
n = int(input())
r = n // 4
flag = False
for i in range(r+1):
  for j in range(r+1):
    if 4*i + 7*j == n:
      flag = True
      break
if flag:
  print('Yes')
else:
  print('No')
Buggy code:
n = int(input())
a=int(n/4)+1
b=int(n/7)+1
ans=0
for i in range(a+1):
  for j in range(b+1):
    if 4*i+7*j=n:
      ans+=1
if ans==0:
  print("No")
else:
  print("Yes")

Fixed code:
n = int(input())
a=int(n/4)+1
b=int(n/7)+1
ans=0
for i in range(a+1):
  for j in range(b+1):
    if 4*i+7*j==n:
      ans+=1
if ans==0:
  print("No")
else:
  print("Yes")
Buggy code:
def check_pay(N):
    for i in range(0,int(N/4)):
        for j in range(0,int(N/7)):
            if i*4+j*7 == N:
                print("Yes")
                return
    print("No")
check_pay(int(input()))


Fixed code:
def check_pay(N):
    for i in range(int(N/4)+1):
        for j in range(0,int(N/7)+1):
            if i*4+j*7 == N:
                print("Yes")
                return
    print("No")
check_pay(int(input()))
Buggy code:
#105_B
N=int(input())
flg=False
for i in range(0,N//7+1):
    x=N
    x=x-7*i
    if N%4==0:
        flg=True
        break
print('Yes' if flg else 'No')

Fixed code:
#105_B
N=int(input())
flg=False
for i in range(0,N//7+1):
    x=N
    x=x-7*i
    if x%4==0:
        flg=True
        break
print('Yes' if flg else 'No')
Buggy code:
N=input()
flag=0
for i in range(26):
  for j in range(15):
    if 4*i+7*j==int(N):
     flag=1
    break

if flag==1:
  print("Yes")
else:
  print("No")

Fixed code:
N=input()
flag=0
for i in range(26):
  for j in range(15):
    if 4*i+7*j==int(N):
     flag=1
     break

if flag==1:
  print("Yes")
else:
  print("No")
Buggy code:
n=int(input())


a=0
for i in range(0,n):
    for j in range(0,n):
        if 4*i+7*j==n:
            a+=1


if a==0:
    print("N0")
else:
    print("Yes")

Fixed code:
n=int(input())


a=0
for i in range(0,n):
    for j in range(0,n):
        if 4*i+7*j==n:
            a+=1


if a==0:
    print("No")
else:
    print("Yes")
Buggy code:
def solve():
    n = int(input())
    max_cake = n // 4
    max_donut = n // 7
    for c in range(max_cake + 1):
        for d in range(max_donut + 1):
            if n == 4 * c + 7 * d:
                return "Yes"
    return "No"


if __name__ == "__main__":
    solve()


Fixed code:
def solve():
    n = int(input())
    max_cake = n // 4
    max_donut = n // 7
    for c in range(max_cake + 1):
        for d in range(max_donut + 1):
            if n == 4 * c + 7 * d:
                return "Yes"
    return "No"


if __name__ == "__main__":
    print(solve())
Buggy code:
n = int(input())
for i in range(n//7+1):
    for j in range(n//4+1):
        if 7*i + 4*j == n:
            print("Yes")
            exit()
print("NO")

Fixed code:
n = int(input())
for i in range(n//7+1):
    for j in range(n//4+1):
        if 7*i + 4*j == n:
            print("Yes")
            exit()
print("No")
Buggy code:
N = int(input())

flag = 1
for i in range(N // 7):
  if (N - 7 * i) % 4 == 0:
    print("Yes")
    flag = 0
    break
    
if flag:
  print("No")

Fixed code:
N = int(input())
 
flag = 1
for i in range(N // 7 + 1):
  if (N - 7 * i) % 4 == 0:
    print("Yes")
    flag = 0
    break
    
if flag:
  print("No")
Buggy code:
dollar = int(input())

can = False
for cakes in range(int(dollar / 4) + 1):
  for donuts in range(int(dollar /7) + 1):
    price = 4 * cakes + 7 * donuts
    print(cakes, donuts, price, dollar)
    if price == dollar:
      can = True
      break
    elif price > dollar:
      break
  if can == True:
    break
    
print("Yes" if can == True else "No")

Fixed code:
dollar = int(input())

can = False
for cakes in range(int(dollar / 4) + 1):
  for donuts in range(int(dollar /7) + 1):
    price = 4 * cakes + 7 * donuts
    if price == dollar:
      can = True
      break
    elif price > dollar:
      break
  if can == True:
    break
    
print("Yes" if can == True else "No")
Buggy code:
n = int(input())

flag = False
for i in range(n // 4):
  for j in range(n // 7):
    if i * 4 + j * 7 == n:
      flag = True

if flag:
  print('Yes')
else:
  print('No')


Fixed code:
n = int(input())
 
flag = False
for i in range(n // 4 + 1):
  for j in range(n // 7 + 1):
    if i * 4 + j * 7 == n:
      flag = True

if flag:
  print('Yes')
else:
  print('No')
Buggy code:
N = input()
flag = False
for i in range(N//4 + 1):
    for j in range(N//7 + 1):
        if 4 * i + 7 * j == N:
            flag = True
            break
if flag:
    print("Yes")
else:
    print("No")

Fixed code:
N = int(input())
flag = False
for i in range(N//4+1):
    for j in range(N//7+1):
        if 4 * i + 7 * j == N:
            flag = True
if flag:
    print("Yes")
else:
    print("No")
Buggy code:
n = int(input())
print("Yes" if any((n - i*7) % 4 == 0 for i in range(n // 7 + 1) else "No")

Fixed code:
n = int(input())
print("Yes" if any((n - i*7) % 4 == 0 for i in range(n // 7 + 1)) else "No")
Buggy code:
def check(n):
    for i in range( n // 7 + 1 ):
        for j in range( n // 4 + 1 ):
            if (i*7 + i*4) == n:
                print("Yes")
                return

    print("No")
    return


n = int(input().strip())
check(n)

Fixed code:
def check(n):
    for i in range( n // 7 + 1 ):
        for j in range( n // 4 + 1 ):
            if (i*7 + j*4) == n:
                print("Yes")
                return

    print("No")
    return


n = int(input().strip())
check(n)
Buggy code:
n = int(input())
ans = "No"
for i in range(n // 4):
    for j in range(n // 7):
        if 4 * i + 7 * j == n:
            ans = "Yes"
            break
print(ans)

Fixed code:
n = int(input())
ans = "No"
for i in range(n // 4 + 1):
    for j in range(n // 7 + 1):
        if 4 * i + 7 * j == n:
            ans = "Yes"
            break
print(ans)
Buggy code:
n = int(input())

isExist = False
for i in range(int(n / 7)):
  for j in range(int(n / 4)):
    if (7 * i + 4 * j == n):
      isExist = True
      break
if isExist:
  print("Yes")
else:
  print("No")

Fixed code:
n = int(input())
 
isExist = False

for i in range(int(n / 7) + 1):
  for j in range(int(n / 4) + 1):
    if (7 * i + 4 * j == n):
      isExist = True
      break

if isExist:
  print("Yes")
else:
  print("No")
Buggy code:
n = int(input())
for i in range(n//7+1):
    if (n-7*i)%4==0:
        print('Yes')
        break
    else:
        print('No')

Fixed code:
N = int(input())
for i in range(N//7+1):
  if (N-i*7)%4 == 0:
    print('Yes')
    break
else:
  print('No')
Buggy code:
N=int(input())

donuts=N//7
ans="No"
for i in range(donuts,-1,-1):
  left_price=N-7*i
  if left_price%4==0:
    ans="Yes"
    break

    print(ans)
        

Fixed code:
N=int(input())
 
donuts=N//7
ans="No"

for i in range(donuts,-1,-1):
  left_price=N-7*i
  if left_price%4==0:
    ans="Yes"
    break
 
print(ans)
Buggy code:
N=int(input())
for i in range(26) :
  if N=>4 and (N-(4*i))%7==0 :
    print("Yes")
    break
else :
  print("No")

Fixed code:
N=int(input())
for i in range(26) :
  if  N >= 4*i and (N-(4*i))%7==0 :
    print("Yes")
    break
else :
  print("No")
Buggy code:
n=int(input())

print(n%2)
ans=[]
while n!=0:
    r=n%2
    ans.append(r)
    n=int((n-r)/(-2))

ans.reverse()

for i in ans:
    print(i,end='')



Fixed code:
n=int(input())

ans=[]
if(n==0):
    print(0)
    exit()


while n!=0:
    r=n%2
    ans.append(r)
    n=int((n-r)/(-2))

ans.reverse()

for i in ans:
    print(i,end='')
Buggy code:
n = int(input())
x = ''

while n!=0:
  print((n//2))
  x = str(n%2) + x
  n = -(n//2)

print(x)

Fixed code:
n = int(input())
x = ''

while n!=0:
  x = str(n%2) + x
  n = -(n//2)

print(0 if x == '' else x)
Buggy code:
N=int(input())
ans=""
while N!=0:
    if N%2!=0:
        
        ans="1"+ans
        N-=1
    else:
        ans="0"+ans
    N=N/-2   
print(ans)

Fixed code:
N=int(input())
ans=""
while N!=0:
    if N%2!=0:
        
        ans="1"+ans
        N-=1
    else:
        ans="0"+ans
    N=N/-2   
if ans=="":
    ans="0"
print(ans)
Buggy code:
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
import string
from bisect import bisect_left, bisect_right
from math import factorial, ceil, floor, cos, radians, pi, sin
from operator import mul
from functools import reduce
from operator import mul


sys.setrecursionlimit(2147483647)
INF = 10 ** 13
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def I(): return int(sys.stdin.buffer.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
def IR(n): return [I() for i in range(n)]
def LIR(n): return [LI() for i in range(n)]
def SR(n): return [S() for i in range(n)]
def LSR(n): return [LS() for i in range(n)]
def SRL(n): return [list(S()) for i in range(n)]
def MSRL(n): return [[int(j) for j in list(S())] for i in range(n)]
mod = 10 ** 9 + 7

n = I()
ans = ""
while n:
    r = n % -2
    n = n // -2
    if r == -1:
        n += 1
        r += 2
    if r:
        ans = "1" + ans
    else:
        ans = "0" + ans

print(ans)

Fixed code:
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
import string
from bisect import bisect_left, bisect_right
from math import factorial, ceil, floor, cos, radians, pi, sin
from operator import mul
from functools import reduce
from operator import mul


sys.setrecursionlimit(2147483647)
INF = 10 ** 13
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def I(): return int(sys.stdin.buffer.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
def IR(n): return [I() for i in range(n)]
def LIR(n): return [LI() for i in range(n)]
def SR(n): return [S() for i in range(n)]
def LSR(n): return [LS() for i in range(n)]
def SRL(n): return [list(S()) for i in range(n)]
def MSRL(n): return [[int(j) for j in list(S())] for i in range(n)]
mod = 10 ** 9 + 7

n = I()
if n == 0:
    print("0")
    exit()
ans = ""
while n:
    r = n % -2
    n = n // -2
    if r == -1:
        n += 1
        r += 2
    if r:
        ans = "1" + ans
    else:
        ans = "0" + ans

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

ttl = n
ans = []

memo = -2
memo2 = 1

while(abs(ttl)>0):
    if ttl%memo != 0:
        ttl -= memo2
        ans.append(1)
    else:
        ans.append(0)

    memo *= (-2)
    memo2 *= (-2)

for i in range(1,len(ans)+1):
    print(ans[-i],end = "")
print()

Fixed code:
n = int(input())

ttl = n
ans = []

memo = -2
memo2 = 1

while(abs(ttl)>0):
    if ttl%memo != 0:
        ttl -= memo2
        ans.append(1)
    else:
        ans.append(0)

    memo *= (-2)
    memo2 *= (-2)

if n == 0:
    print(0)
else:
    for i in range(1,len(ans)+1):
        print(ans[-i],end = "")
    print()
Buggy code:
n=int(input())
L=[]
while abs(n)>0:
	if n>0:
		r=n%2
		n=-(n//2)
	else:
		r=(-n)%2
		n=(-n)//2
		if r==1:
			n+=1
	L.append(r)
print(''.join(map(str,L[::-1])))

Fixed code:
n=int(input())
if n==0:
	print('0')
else:
	L=[]
	while n!=0:
		if n>0:
			r=n%2
			n=-(n//2)
		else:
			r=(-n)%2
			n=(-n)//2
			if r==1:
				n+=1
		L.append(r)
	print(''.join(map(str,L[::-1])))
Buggy code:
n = int(input())
digit = 1
ex = ""
while(n):
    if n%2==0:
        ex='0'+ex
    else:
        ex='1'+ex
        n-=-1+2*(digit%2)
    n=n//2
    digit+=1
print(ex)

Fixed code:
n = int(input())
digit = 1
ex = ""
while(n):
    if n%2==0:
        ex='0'+ex
    else:
        ex='1'+ex
        n-=-1+2*(digit%2)
    n=n//2
    digit+=1
print(ex if ex else "0")
Buggy code:
N = int(input())

ans = ''
while N != 0:
    r = N % 2
    N = (N - r) / (-2)
    ans += r

ans[::-1]
if N == 0:
    ans = '0'
    
print(ans)

Fixed code:
N = int(input())

ans = ''
while N != 0:
    r = N % 2
    N = (N - r) // (-2)
    ans += str(r)

ans = ans[::-1]
if ans == '':
    ans = '0'

print(ans)
Buggy code:
N = int(input())
ans = ''
while N != 1:
    if abs(N) % 2 == 1:
        ans += '1'
        N = (N-1) // -2
    else:
        ans += '0'
        N = N // -2
ans += '1'
print(ans[::-1])

Fixed code:
N = int(input())
ans = ''
if N == 0:
    print(0)
    quit()
while N != 1:
    if abs(N) % 2 == 1:
        ans += '1'
        N = (N-1) // -2
    else:
        ans += '0'
        N = N // -2
ans += '1'
print(ans[::-1])
Buggy code:
N = int(input())

if N == 0:
    print(0)
    exit()

ans = ""
while N != 0:
    if N % 2 != 0:
        N -= 1
        ans += "1"
    else:
        ans += "0"
    N //= -2
print(ans)

Fixed code:
N = int(input())
ans = ''
 
while (N!=0) :
    if (N%2) :
        ans = '1' + ans
        N -= 1
    else :
        ans = '0' + ans
    N /= -2
 
print(ans if (ans != '') else '0')
Buggy code:
N = int(input())
m = 1

min = 0
max = 1

i = 0
while True:
    m *= 2

    if i % 2 == 0:
        min -= m
    else:
        max += m

    if min <= N <= max:
        break

    i += 1

# print(min,max)
# print("i =",i)
# print("m =",m)
ans = []

while True:
    if (min + max)/2 < N:
        if i % 2 == 0:
            ans.append("0")
        else:
            ans.append("1")
        min += m

    elif N < (min + max)/2 :
        if i % 2 == 0:
            ans.append("1")
        else:
            ans.append("0")
        max -= m

    else:
        break

    m /= 2
    i -= 1

print("".join(ans))

Fixed code:
import sys

N = int(input())
m = 1

min = 0
max = 1

if N == 0:
    print("0")
    sys.exit()
elif N == 1:
    print("1")
    sys.exit()

i = 0
while True:
    m *= 2

    if i % 2 == 0:
        min -= m
    else:
        max += m

    if min <= N <= max:
        break

    i += 1

# print(min,max)
# print("i =",i)
# print("m =",m)
ans = []

while True:
    if (min + max)/2 < N:
        if i % 2 == 0:
            ans.append("0")
        else:
            ans.append("1")
        min += m

    elif N < (min + max)/2 :
        if i % 2 == 0:
            ans.append("1")
        else:
            ans.append("0")
        max -= m

    else:
        break

    m /= 2
    i -= 1

print("".join(ans))
Buggy code:
import sys

N = int(sys.stdin.readline())
binN = ""
pN = abs(N)
while N != 0:
    if abs(N % -2) == 1:
        binN += "1"
    else:
        binN += "0"
    N += N%(-2)
    N //= -2
print(binN[::-1])

Fixed code:
import sys

N = int(sys.stdin.readline())
if N == 0:
    print(0)
    sys.exit()
binN = ""
pN = abs(N)
while N != 0:
    if abs(N % -2) == 1:
        binN += "1"
    else:
        binN += "0"
    N += N%(-2)
    N //= -2
print(binN[::-1])
Buggy code:
N = int(input())
A = []
while N != 0:
  A = [N % (-2)] + A[:]
if N == 0:
  A = [0]
for i in range(len(A)):
  print(A[i], end = '')

Fixed code:
N = int(input())
A = []
if N == 0:
  A = [0]
i = 0
while N != 0:
  A = [N % 2] + A[:]
  N //= 2
  N = -N
for i in range(len(A)):
  print(A[i], end = '')