qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import sys
n = int(input())

ansl = []

while n:
    if n % -2 == 0:
        ansl.append("0")
    else:
        n -= 1
        ansl.append("1")
    n = n // -2

ansl.reverse()
print("".join(ansl))

Fixed code:
import sys
n = int(input())

ansl = []
if n == 0:
    print("0")
    sys.exit()
while n:
    if n % -2 == 0:
        ansl.append("0")
    else:
        n -= 1
        ansl.append("1")
    n = n // -2

ansl.reverse()
print("".join(ansl))
Buggy code:
n = int(input())
if n == 0:
    print("0")
    exit()
ans = ""
while n != 0:
    if n % (-2) == 0:
        n = n // (-2)
        ans = ans + "0"
    else:
        n = (n - 1) // (-2)
        ans = ans + "1"
print(ans)

Fixed code:
n = int(input())
if n == 0:
    print(0)
    exit()
ans = ""
while n != 0:
    if n % (2) == 0:
        n = n // (-2)
        ans = "0" + ans
    else:
        n = (n - 1) // (-2)
        ans = "1" + ans
print(ans)
Buggy code:
# coding:utf-8

n = input()

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

ans = ''
while abs(n) > 0:
    if n % 2 != 0:
        ans += '1'
        n -= 1
        n //= -2
    else:
        ans += '0'
        n //= -2

print(ans[::-1])

Fixed code:
# coding:utf-8

n = int(input())

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

ans = ''
while abs(n) > 0:
    if n % 2 != 0:
        ans += '1'
        n -= 1
        n //= -2
    else:
        ans += '0'
        n //= -2

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

Fixed code:
n=int(input());s=''
while n!=0:s=str(n%2)+s;n=-(n//2)
print(s if s else 0)
Buggy code:
num_dec = int(input())
num_bin = ''

while num_dec != 0:
  if num_dec % 2:
    num_dec -= 1
    num_bin += '1'
  else:
    num_bin += '0'
  num_dec /= -2

print(num_bin[::-1])

Fixed code:
num_dec = int(input())
num_bin = ''

while num_dec != 0:
  if num_dec % 2:
    num_dec -= 1
    num_bin += '1'
  else:
    num_bin += '0'
  num_dec /= -2

if num_bin == '':
  num_bin += '0'

print(num_bin[::-1])
Buggy code:
n = int(input())
k = 1
kotae = []
kotae2 = []

if n != 0:
    while n != 0:
        if n % ((-2) ** k) == 0:
            kotae.append(0)
        else:
            kotae.append(1)
            n = n - ((-2) ** (k - 1))
        k = k + 1

    for i in kotae[::-1]:
        kotae2.append(i)

    print("".join(kotae2))
else:
    print(0)

Fixed code:
n = int(input())
k = 1
kotae = []
kotae2 = []

if n != 0:
    while n != 0:
        if n % ((-2) ** k) == 0:
            kotae.append(0)
        else:
            kotae.append(1)
            n = n - ((-2) ** (k - 1))
        k = k + 1

    for i in kotae[::-1]:
        kotae2.append(str(i))

    print("".join(kotae2))
else:
    print(0)
Buggy code:
import math

N = int(input())
a = 1
res = ""
while N != 0:
    if N % (2 * a) == 0:
        res = "0" + res
    else:
        res = "1" + res
        N -= a
    a *= -2
print(res)

Fixed code:
import math

N = int(input())
if N == 0:
    print('0')
    quit()

a = 1
res = ""
while N != 0:
    if N % (2 * a) == 0:
        res = "0" + res
    else:
        res = "1" + res
        N -= a
    a *= -2
print(res)
Buggy code:
n = int(input())
b = ''
while True:
    if abs(n) <= 1:
        b += str(n)
        break
    b += str(n % 2)
    n = (n - n % 2) // (-2)
print(b[::-1])


Fixed code:
n = int(input())
b = ''
while True:
    if 0 <= n <= 1:
        b += str(abs(n))
        break
    b += str(n % 2)
    n = (n - n % 2) // (-2)
print(b[::-1])
Buggy code:
n=int(input())
s=''
while n!=0:
  s=str(n%2)+s
  n=-(n//2)
print(s*(s!='')else 0)

Fixed code:
n=int(input())
s=''
while n!=0:
  s=str(n%2)+s
  n=-(n//2)
print(s*(s!='')or 0)
Buggy code:
n = int(input())

s = ""

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

print(s[::-1])

Fixed code:
n = int(input())

s = ""

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

if len(s) > 0:
    print(s[::-1])
else:
    print(0)
Buggy code:
n = int(input())

ans = ""
while n != 0:
    rest = n % 2
    if rest == 1:
        ans += "1"
    else:
        ans += "0"

    n = (n - rest) // -2

if ans == "":
    ans += "0"

print(ans)

Fixed code:
n = int(input())

ans = ""
while n != 0:
    rest = n % 2
    if rest == 1:
        ans += "1"
    else:
        ans += "0"

    n = (n - rest) // -2

if ans == "":
    ans += "0"

print(ans[::-1])
Buggy code:
N = int(input())

ans, d = '', 2
while abs(N) > 0:
    ans = '0' + ans if N % d == 0 else '1' + ans
    N, d = N - N % d, d * (-2)

print(ans)


Fixed code:
N = int(input())

n, ans, d = N, '', 2
while abs(n) > 0:
    ans = '0' + ans if n % d == 0 else '1' + ans
    n, d = n - n % d, d * (-2)
print('0' if N == 0 else ans)
Buggy code:
if __name__ == '__main__':
    N = int(input())

    rev_answer = ""
    while N != 0:
        rem = N % (-2)
        if rem < 0:
            rem += 2
        N = (N - rem) // (-2)
        rev_answer += str(rem)

    answer = rev_answer[::-1]
    print(answer)

Fixed code:
if __name__ == '__main__':
    N = int(input())

    rev_answer = ""
    while N != 0:
        rem = N % (-2)
        if rem < 0:
            rem += 2
        N = (N - rem) // (-2)
        rev_answer += str(rem)

    answer = rev_answer[::-1]
    if answer == "":
        answer = 0

    print(answer)
Buggy code:
N=int(input())
S=""
for i in range(50):
    if N%(-2)==0:
        S=S+"0"
    else:
        S=S+"1"
        N-=1
    N=N//(-2)
print(int(S))

Fixed code:

N=int(input())
S=""
for i in range(50):
    if N%(-2)==0:
        S="0"+S
    else:
        S="1"+S
        N-=1
    N=N//(-2)
print(int(S))
Buggy code:
n = int(input())
ans = ''
a = 2
while True:
	if n == 0:
		break
	if n % a == 0:
		ans += '0'
	else:
		ans += '1'
		n -= (a//2)

	n = n//2
	if a == 2:
		a = -2
	else:
		a = 2


ans = ans[::-1]
print(ans)


Fixed code:
n = int(input())
nn = n
ans = ''
a = 2
while True:
	if n == 0:
		break
	if n % a == 0:
		ans += '0'
	else:
		ans += '1'
		n -= (a//2)

	n = n//2
	if a == 2:
		a = -2
	else:
		a = 2


ans = ans[::-1]
if nn == 0:
	print(0)
else:
	print(ans)
Buggy code:
n=int(input())

s=""
index=1

while n!=0:
    if n%2!=0:
        s+="1"
        n+=(-1)**index
    else:
        s+="0"
    n//=2
    index+=1
print(s[::-1])

Fixed code:
n=int(input())

s=""
index=1

while n!=0:
    if n%2!=0:
        s+="1"
        n+=(-1)**index
    else:
        s+="0"
    n//=2
    index+=1

if len(s)==0:
    s="0"

print(s[::-1])
Buggy code:
n=int(input())
ans=""
while n!=0:
  ans=str(n%2)+ans
  n=-(n//2)
print(ans)

Fixed code:
n=int(input())
ans=""
while n!=0:
  ans=str(n%2)+ans
  n=-(n//2)
print(ans if ans!="" else 0)
Buggy code:
n = int(input())
a = []
b = 0
while n != 0:
    c = (-2) ** b
    if n % (c*(-2)) != 0:
        n -= c
        a.append("1")
    else:
        a.append("0")
    b += 1
ans = "".join(reversed(a))
print(ans)

Fixed code:
n = int(input())
a = []
b = 0
while n != 0:
    c = (-2) ** b
    if n % (c*(-2)) != 0:
        n -= c
        a.append("1")
    else:
        a.append("0")
    b += 1
ans = "".join(reversed(a))
if ans == "":
  ans = 0
print(ans)
Buggy code:
n = int(input())
a = []
while n > 0:
  if n%2 ==0:
    n = n/(-2)
    a.append("0")
  else:
    n = (n-1)(-2)
    a.append("1")
    
b = ""
for i in range(len(a)):
  b += a[len(a)-i-1]
  
print("b")
  
  

Fixed code:
n = int(input())
a = []
if n ==0:
  print(0)
else:
  while n != 0:
    if n%2 ==0:
      n = n/(-2)
      a.append("0")
    else:
      n = (n-1)/(-2)
      a.append("1")
    
  b = ""
  for i in range(len(a)):
    b += a[len(a)-i-1]

  print(b)
Buggy code:
N = int(input())
S = ""
while N != 0 :
    if N % (-2) == 0 :
        S = "0"+S
    else :
        S = "1"+S
        N -= 1
    N = N / 2
if len(S) != 0 :
    print(S)
else :
    print(0)



Fixed code:
N = int(input())
S = ""
while N != 0 :
    if N % (-2) == 0 :
        S = "0" + S
    else :
        S = "1" + S
        N -= 1
    N = N / (-2)
if len(S) == 0 :
    print(0)
else :
    print(S)
Buggy code:
n = int(input())
if n == 0:
    print(0)
    exit(0)

oddsum = [2, 10, 42, 170, 682, 2730, 10922, 43690, 174762, 699050, 2796202, 11184810, 44739242, 178956970, 715827882, 2863311530]
evensum = [1, 5, 21, 85, 341, 1365, 5461, 21845, 87381, 349525, 1398101, 5592405, 22369621, 89478485, 357913941, 1431655765]
two = [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648, 4294967296, 8589934592, 17179869184]
ans = 0
while n != 0:
    if n < 0:
        x = 1
        for i in oddsum:
            if n >= -1 * i:
                break
            x += 2
        n += two[x]
    else:
        x = 0
        for i in evensum:
            if n <= i:
                break
            x += 2
        n -= two[x]
    v = 1 << x
    ans += v
print(bin(ans))

Fixed code:
n = int(input())
if n == 0:
    print(0)
    exit(0)

oddsum = [2, 10, 42, 170, 682, 2730, 10922, 43690, 174762, 699050, 2796202, 11184810, 44739242, 178956970, 715827882, 2863311530]
evensum = [1, 5, 21, 85, 341, 1365, 5461, 21845, 87381, 349525, 1398101, 5592405, 22369621, 89478485, 357913941, 1431655765]
two = [1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648, 4294967296, 8589934592, 17179869184]
ans = 0
while n != 0:
    if n < 0:
        x = 1
        for i in oddsum:
            if n >= -1 * i:
                break
            x += 2
        n += two[x]
    else:
        x = 0
        for i in evensum:
            if n <= i:
                break
            x += 2
        n -= two[x]
    v = 1 << x
    ans += v
print(bin(ans)[2:])
Buggy code:
n=int(input())
s=''
while n!=0:
  if n%(-2)==0:
    s='0'+s
  else:
    s='1'+s
    n-=1
  n//=-2
print(s)

Fixed code:
n=int(input())
if n==0:
  print(0)
else:
  s=''
  while n!=0:
    if n%(-2)==0:
      s='0'+s
    else:
      s='1'+s
      n-=1
    n//=-2
  print(s)
Buggy code:
import sys,math,collections,itertools
input = sys.stdin.readline

N=int(input())
s = []

while N:
    r = N%(-2)
    if r<0:
        r+=2
    N = (N-r)//(-2)
    s.append(str(r))
print(''.join(s)[::-1])


Fixed code:
import sys,math,collections,itertools
input = sys.stdin.readline

N=int(input())
s = []
if N ==0:
    print(0)
    exit()
    
while N:
    r = N%(-2)
    if r<0:
        r+=2
    N = (N-r)//(-2)
    s.append(str(r))

print(''.join(s)[::-1])
Buggy code:
N = int(input())

s = ""
while abs(N) > 0:
    m = N % (-2)
    if m != 0:
        s = "1" + s
    else:
        s = "0" + s
    N = (N+m) // (-2)
    print(m, N)
print(s)


Fixed code:
N = int(input())

if N == 0:
    print(0)
else:
    s = ""
    while abs(N) > 0:
        m = N % (-2)
        if m != 0:
            s = "1" + s
        else:
            s = "0" + s
        N = (N+m) // (-2)
    print(s)
Buggy code:
n=int(input())
L=[]
cnt=0
while(n!=0):
    cnt+=1
    a=n%(2**cnt)
    b=(1 if a>0 else 0)
    L.append(b)
    n=n-(((-2)**(cnt-1))*b)
L=list(map(str,L))[::-1]
print("".join(L))

Fixed code:
n=int(input())
L=[]
cnt=0
while(n!=0):
    cnt+=1
    a=n%(2**cnt)
    b=(1 if a>0 else 0)
    L.append(b)
    n=n-(((-2)**(cnt-1))*b)
L=list(map(str,L))[::-1]
print("".join(L) if len(L)>0 else 0)
Buggy code:
n=int(input())
ans=[]
if n==0:
    print(0)
    exit()
    
for i in range(100):
    if  n==0:
        break
    if n%(2**(i+1))==0:
        ans.append('0')
    else:
        if i%2==0:
            n-=2**i
        else:
            n+=2**i
        ans.append('1')

print(''.join(map(str, ans)))

Fixed code:
n=int(input())
ans=[]
if n==0:
    print(0)
    exit()
    
for i in range(100):
    if  n==0:
        break
    if n%(2**(i+1))==0:
        ans.append('0')
    else:
        if i%2==0:
            n-=2**i
        else:
            n+=2**i
        ans.append('1')
ans.reverse()
print(''.join(map(str, ans)))
Buggy code:
n=int(input())
ans=""
i=1
while True:
  if n==0:break
  else:
    if n%(2**i)==0:ans="0"+ans;n-=2**i;i+=1
    else:ans="1"+ans;n-=2**i;i+=1
print(ans)

Fixed code:
n=int(input())
ans=""
i=1
while True:
  if n==0:break
  else:
    if n%(2**i)==0:ans="0"+ans;i+=1
    else:ans="1"+ans;n-=(-2)**(i-1);i+=1
print(ans if ans!="" else 0)
Buggy code:
n = int(input())
ansl = []
while n != 0:
	if n % 2 == 1:
		ansl.append("1")
		n -= 1
	else:
		ansl.append("0")
	n //= -2
print("".join(ansl)[::-1])

Fixed code:
n = int(input())
ansl = []
if n == 0:
	print(0)
	exit()
while n != 0:
	if n % 2 == 1:
		ansl.append("1")
		n -= 1
	else:
		ansl.append("0")
	n //= -2
print("".join(ansl)[::-1])
Buggy code:

if __name__ == '__main__':
    N=int(input())
    ans=[]
    while N:
        ans.append(str(N%2))
        N=-(N//2)
    ans.reverse()
    print("".join(ans))

Fixed code:

if __name__ == '__main__':
    N=int(input())
    if N==0:
        print(0)
    else:
        ans=[]
        while N:
            ans.append(str(N%2))
            N=-(N//2)
        ans.reverse()
        print("".join(ans))
Buggy code:
n = int(input())

mbits = []

while abs(n) > 0:
    mbits.append(n % 2)
    n = n // 2 * (-1)

ans = map(str, reversed(mbits))
ans = ''.join(ans)
print(ans)


Fixed code:
n = int(input())

mbits = []

while abs(n) > 0:
    mbits.append(n % 2)
    n = n // 2 * (-1)

if len(mbits) == 0:
    mbits = [0]

ans = map(str, reversed(mbits))
ans = ''.join(ans)
print(ans)
Buggy code:
n=int(input())
s=""
while n: 
    rem=n%(-2)
    n=n//(-2)
    if(rem<0):
        rem+=2 
        n+=1 
    s=str(rem)+s 
print(s)

Fixed code:
n=int(input())
s=""
while n: 
    rem=n%(-2)
    n=n//(-2)
    if(rem<0):
        rem+=2 
        n+=1 
    s=str(rem)+s 
print(s if s else "0")
Buggy code:
n = int(input())
ans = ''`
while n != 0:
    if n % (-2) == 0:
        ans = '0' + ans
    else:
        ans = '1' + ans
        n -= 1
    n /= -2
if ans == '':
    ans = '0'
print(ans)

Fixed code:
n=int(input())

ans=''
while n!=0:
  ans=str(n%2)+ans
  n=-(n//2)
print(ans if ans!='' else 0)
Buggy code:
n,i,a=int(input()),0,0
while n:
  r=-2**i
  if (n-r)%(-2*r)==0:
    a+=10**i;n-=r
  i+=1
print(a)
    

Fixed code:
n,i,a=int(input()),0,0
while n:
  r=(-2)**i
  if (n-r)%(-2*r)==0:
    a+=10**i;n-=r
  i+=1
print(a)
Buggy code:
N = int(input())

if N==0:
    print(0)
else:
    ans = []
    
    while N!=0:
        now = str(N%2)
        ans.append(now)
        N = -1*(N//2)
    
    print(''.join(ans))

Fixed code:
N = int(input())

if N==0:
    print(0)
else:
    ans = []
    
    while N!=0:
        now = str(N%2)
        ans.append(now)
        N = -1*(N//2)
    ans.reverse()
    print(''.join(ans))
Buggy code:
N=int(input())

m = 2
s = ""
sgn = 1
while N!=0:
    r = N % m
    s += "1" if r != 0 else "0"
    m *= -2
    N = N -r 
if N == 0:
    print(0)
else:
    print(s[::-1])


Fixed code:
N=int(input())

if N == 0:
    print(0)
else:
    m = 2
    s = ""
    sgn = 1
    while N!=0:
        r = N % m
        s += "1" if r != 0 else "0"
        m *= -2
        N = N -r 
    print(s[::-1])
Buggy code:
n = int(input())
s =""
k = 0
while n!=0:
  if n%(2**(k+1)) == 2**k:
    if k%2 == 0:
      n -= 2**k
    else:
      n += 2**k
    s += "1"
  else:
    s += "0"
  k += 1

if s="":
  s="0"

print("".join(s))

Fixed code:
n = int(input())
s = ""
k = 0
while n!=0:
  if n%(2**(k+1)) == 2**k:
    if k%2 == 0:
      n -= 2**k
    else:
      n += 2**k
    s = "1"+s
  else:
    s = "0"+s
  k += 1

if s=="":
  s="0"

print("".join(s))
Buggy code:
n=int(input())
a=[]
k=0

while k<1:
    if n==0:
        k=1
    else:
        if n%2==0:
            a.append(0)
            n=n/(-2)
        else:
            a.append(1)
            n=(n-1)/(-2)
            
for i in (reversed(a)):
    print(i,end="")

Fixed code:
n=int(input())
a=[]
k=0

if n==0:
    print(0)

while k<1:
    if n==0:
        k=1
    else:
        if n%2==0:
            a.append(0)
            n=n/(-2)
        else:
            a.append(1)
            n=(n-1)/(-2)
            
for i in (reversed(a)):
    print(i,end="")
Buggy code:
n = int(input())
i = 1
s = []
while n!=0:
    if n%2**i>0:
        s.append('1')
        n -= (-2)**(i-1)
    else:
        s.append('0')
    i += 1
if n==0:
    print('0')
else:
    print(''.join(s[::-1]))

Fixed code:
n = int(input())
if n==0:
    print('0')
    exit(0)
i = 1
s = []
while n!=0:
    if n%2**i>0:
        s.append('1')
        n -= (-2)**(i-1)
    else:
        s.append('0')
    i += 1
print(''.join(s[::-1]))
Buggy code:
N = int(input())
minus_bit = ''
if N == 0:
    minus_bit = '0'
while N != 0:
    mod = N % 4
    if mod == 0:
        minus_bit = minus_bit + '00'
        N = N//4
        print(N)
    elif mod == 1:
        minus_bit = minus_bit + '10'
        N = (N-1)//4
        print(N)
    elif mod == 2:
        minus_bit = minus_bit + '01'
        N = (N+2)//4
        print(N)
    else:
        minus_bit = minus_bit + '11'
        N = (N+1)//4
        print(N)

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

Fixed code:
N = int(input())
minus_bit = ''
if N == 0:
    minus_bit = '00'
while N != 0:
    mod = N % 4
    if mod == 0:
        minus_bit = minus_bit + '00'
        N = N//4
    elif mod == 1:
        minus_bit = minus_bit + '10'
        N = (N-1)//4
    elif mod == 2:
        minus_bit = minus_bit + '01'
        N = (N+2)//4
    else:
        minus_bit = minus_bit + '11'
        N = (N+1)//4

if minus_bit[-1] == '0':
    minus_bit = minus_bit[:-1]
print(minus_bit[::-1])
Buggy code:
n = int(input())
v = -2
s = ""
while n != 0:
    if n%v != 0:
        s += "1"
        n -= v//(-2)
    else:
        s += "0"
    v *= -2
print(s[::-1])

Fixed code:
n = int(input())
v = -2
s = "" if n != 0 else "0"
while n != 0:
    if n%v != 0:
        s += "1"
        n -= v//(-2)
    else:
        s += "0"
    v *= -2
print(s[::-1])
Buggy code:
n=int(input())
i=0
q=n
ans=""
b=[]

while 1:
  r=q%(-2)
  q=int(q/(-2))


  if r==0:
    b.append(0)
    if q==0:
      break
  else:
    
    b.append(1)
    if q==0:
      break
    if q>0:
      q=q+1

  i=i+1

b.reverse()
for j in range(i+1):
  ans=ans+str(b[j])

print(ans)
    
    


Fixed code:
n=int(input())
i=0
b=[]
q=n
ans=""

while 1:
  r=q%(-2)
  if q==0:
    b.append(0)
    break
 
  if r==0:
    b.append(0)
    q=int(q/(-2))
  else:
    b.append(1)
    q=int(q/(-2)+0.5)
    if q==0:
      break
  i=i+1

b.reverse()
for j in range(i+1):
  ans=ans+str(b[j])
  
print(ans)
Buggy code:
#! /usr/bin/env python3

n = int(input())

v = []

tmp_n = n
plus = 0

if tmp_n < 0:
    plus = 1
    tmp_n *= -1

while tmp_n > 0:
    v.append(tmp_n & 1)
    tmp_n = tmp_n >> 1

r = [0 for _ in range(len(v) + 10)]
for i in range(len(v)):
    if i % 2 == plus:
        r[i] += v[i]
    else:
        r[i] += v[i]
        r[i + 1] += v[i]

for i in range(len(r)):
    while (r[i] >= 2 and r[i + 1] >= 1):
        r[i] -= 2
        r[i + 1] -= 1
    while r[i] >= 2:
        r[i + 1] += 1
        r[i + 2] += 1
        r[i] -= 2

started = False
res = ""
for i in range(len(r)):
    idx = len(r) - 1 - i
    if r[idx] == 1:
        res = res + "1"
        started = True
    elif started == True:
        res = res + "0"

print(res)


Fixed code:
#! /usr/bin/env python3

n = int(input())

v = []

tmp_n = n
plus = 0

if tmp_n < 0:
    plus = 1
    tmp_n *= -1

while tmp_n > 0:
    v.append(tmp_n & 1)
    tmp_n = tmp_n >> 1

r = [0 for _ in range(len(v) + 10)]
for i in range(len(v)):
    if i % 2 == plus:
        r[i] += v[i]
    else:
        r[i] += v[i]
        r[i + 1] += v[i]

for i in range(len(r)):
    while (r[i] >= 2 and r[i + 1] >= 1):
        r[i] -= 2
        r[i + 1] -= 1
    while r[i] >= 2:
        r[i + 1] += 1
        r[i + 2] += 1
        r[i] -= 2

started = False
res = ""
for i in range(len(r)):
    idx = len(r) - 1 - i
    if r[idx] == 1:
        res = res + "1"
        started = True
    elif started == True:
        res = res + "0"

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

Fixed code:
n = int(input())

if n != 0:
    ans = ''
    while n != 0:
        while n%2 == 0:
            n = n//(-2)
            ans = '0'+ans
        n = n-1
        ans ='1'+ans
        n = n/(-2)
else:
    ans = '0'
    
print(ans)
Buggy code:
n = int(input())
x = ''
while n != 0:
    x = str(n % 2) + x
    n -= (n//2)
print(0 if x == '' else 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:
import math

N = int(input())

def calc_power(num):
    if num > 1:
        m = 5
        power = 2
        while True:
            if num <= m:
                return_num = power
                break
            else:
                m = m * 4 + 1
                power += 2 
    elif num == 1:
        return_num = 0
    elif num == 0:
        print('0')
        exit()
    else:
        m = -2
        power = 1
        while True:
            if num >= m:
                return_num = power
                break
            else:
                m = m * 4 - 2
                power += 2

    return return_num

num = N
pre_power = calc_power(N) + 1
ans = ''
while num != 0:
    power = calc_power(num)
    print(num, power)
    num -= (-2) ** power
    if power == pre_power - 1:
        ans += '1'
    else:
        for _ in range(pre_power - 1 - power):
            ans += '0'
        ans += '1'
    pre_power = power

print(ans)

Fixed code:
import math

N = int(input())

def calc_power(num):
    if num > 1:
        m = 5
        power = 2
        while True:
            if num <= m:
                return_num = power
                break
            else:
                m = m * 4 + 1
                power += 2 
    elif num == 1:
        return_num = 0
    elif num == 0:
        print('0')
        exit()
    else:
        m = -2
        power = 1
        while True:
            if num >= m:
                return_num = power
                break
            else:
                m = m * 4 - 2
                power += 2

    return return_num

num = N
pre_power = calc_power(N) + 1
ans = ''
while num != 0:
    power = calc_power(num)
    num -= (-2) ** power
    if power == pre_power - 1:
        ans += '1'
    else:
        for _ in range(pre_power - 1 - power):
            ans += '0'
        ans += '1'
    if num == 0:
        for _ in range(power):
            ans += '0'
    pre_power = power

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


ans = ''
while N:
    ans = str(abs(N % (-2))) + ans
    N = - (N//2)
    # print(N,ans)

print(ans)

Fixed code:
N = int( input() )


ans = ''
while N:
    ans = str(abs(N % (-2))) + ans
    N = - (N//2)
    # print(N,ans)

print(ans or 0)
Buggy code:
n = int(input())
ans = []
x = 2
i = 0
while n != 0:
    if n%x!=0:
        ans.append(1)
        n = n - (-2)**i
    else:
        ans.append(0)
    i += 1
    x *= 2
print(''.join([ str(x) for x in ans[::-1]]))

Fixed code:
import sys
n = int(input())

if n == 0:
    print(0)
    sys.exit()

ans = []
x = 2
i = 0
while n != 0:
    if n%x!=0:
        ans.append(1)
        n = n - (-2)**i
    else:
        ans.append(0)    
    i += 1
    x *= 2 
print(''.join([ str(x) for x in ans[::-1]]))
Buggy code:
ans = ""
N = int(input())

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


Fixed code:
ans = ""
N = int(input())

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

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

s = ""

while True:
    if n == 0:
        break
    if n%2 == 0:
        s += "0"
        n = n//(-2)
    else:
        s += "1"
        n = (n-1)//(-2)

print(s)

Fixed code:
n = int(input())

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

s = ""

while True:
    if n == 0:
        break
    if n%2 == 0:
        s += "0"
        n = n//(-2)
    else:
        s += "1"
        n = (n-1)//(-2)

print(s[::-1])