qyliang/CodeNanoFix huggingface dataset:
Buggy code:
# -*- coding: utf-8 -*-
import math,string,itertools,fractions,heapq,collections,re,array,bisect

def n():
    return int(input())


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

print(ans)


Fixed code:
# -*- coding: utf-8 -*-
import math,string,itertools,fractions,heapq,collections,re,array,bisect

def n():
    return int(input())

N = n()
ans = ''
if N == 0:
    print(0)
    exit()

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

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

Fixed code:
n = int(input())
s = ''
value = 0
count = 0
while value != n:
    r = n % 2**(count+1)
    if (value + (-2)**count)%(2**(count+1)) == r:
        s += '1'
        value += (-2)**count
    else:
        s += '0'
    count += 1
if n == 0:
    print(0)
else:
    print(int(s[::-1]))
Buggy code:
#print(1//-2)

n = int(input())
result = ''
while n!=0:
  #print(n)
  if n%-2==0:
    result+='0'
    n = n//-2
    #n+=1
  else:
    result+='1'
    if n<0:
      n = n//-2
      n+=1
    else:
      n = n//-2
      n+=1
result = result[::-1]
print(result)


Fixed code:
#print(1//-2)

n = int(input())
if n==0:
  print(0)
else:
  result = ''
  while n!=0:
    #print(n)
    if n%-2==0:
      result+='0'
      n = n//-2
      #n+=1
    else:
      result+='1'
      if n<0:
        n = n//-2
        n+=1
      else:
        n = n//-2
        n+=1
  result = result[::-1]
  print(result)
Buggy code:
s=int(input())
s=0
x=s
list=[]
for i in range(1000000000000000000):
    y=x%(-2)
    if y == -1:
        x = (x-1)//(-2)
        y = 1
    else:
        x=x//(-2)
    list.insert(0, y)
    if x == 0:
        print(*list, sep="")
        break

Fixed code:
s=int(input())
x=s
list=[]
for i in range(1000000000000000000):
    y=x%(-2)
    if y == -1:
        x = (x-1)//(-2)
        y = 1
    else:
        x=x//(-2)
    list.insert(0, y)
    if x == 0:
        print(*list, sep="")
        break
Buggy code:
N = int(input())

def base(x, n):
  ret = []
  while x != 0:
    ret.append( x % abs(n))
    if n < 0:
      x = - ( (-x)//n )
    else:
      x //= n
  return ret

print("".join(map(str, reversed(base(N, -2)))))

Fixed code:

N = int(input())

def base(x, n):
  ret = []
  while x != 0:
    ret.append( x % abs(n))
    if n < 0:
      x = - ( (-x)//n )
    else:
      x //= n
  return ret

if N == 0:
  print(0)
else:
  print("".join(map(str, reversed(base(N, -2)))))
Buggy code:
n = int(input())
i = 0
#for i in range(10):
ans = []
while abs(n) > 0:
    #print(n, n // (2 * (-1)**i), n % (2 * (-1)**i))
    #print(n, n % (2 * (-1)**i), n % 2)
    ans.append(n%2)
    #n = n // (2 * (-1)**i)
    n = (n - n % (2 * (-1)**i)) // 2
    i += 1
#print(n, n % (2 * (-1)**i))
#print(ans[::-1])
print(''.join(map(str, ans[::-1])))


Fixed code:
n = int(input())
if n == 0:
    print(0)
    exit()
i = 0
#for i in range(10):
ans = []
while abs(n) > 0:
    #print(n, n // (2 * (-1)**i), n % (2 * (-1)**i))
    #print(n, n % (2 * (-1)**i), n % 2)
    ans.append(n%2)
    #n = n // (2 * (-1)**i)
    n = (n - n % (2 * (-1)**i)) // 2
    i += 1
#print(n, n % (2 * (-1)**i))
#print(ans[::-1])
print(''.join(map(str, ans[::-1])))
Buggy code:
S = int(input())

num = ''
def division(N):
  if N%2==0:
    return N//-2,'0'
  else:
    return (N//-2)+1,'1'
  
while S!=0:
  a,b = division(S)
  num += b
  S = a

print(num[::-1])

Fixed code:
S = int(input())

num = ''
def division(N):
  if N%2==0:
    return N//-2,'0'
  else:
    return (N//-2)+1,'1'
  
  
if S==0:
  print(0)
else:
  while S!=0:
    a,b = division(S)
    num += b
    S = a
  print(num[::-1])
Buggy code:
n=int(input())
ans=''
i=1
k=n
while k>0:
    if n%(2**i)!=0:
        ans='1'+ans
        k-=(-2)**(i-1)
    else:
        ans='0'+ans
    i+=1
print(ans)

Fixed code:
n=int(input())
if n==0:
    print(0)
    exit()
ans=''
i=1
k=n
while k!=0:
    if k%(2**i)!=0:
        ans='1'+ans
        k-=(-2)**(i-1)
    else:
        ans='0'+ans
    i+=1
print(ans)
Buggy code:
n = int(input())
s = []
div = -2
i = 0
while n!=0:
    r = n % div
    if r == 0:
        s.append(0)
    else:
        s.append(1)
        n -= (-2) ** i
    div *= 2
    i += 1
ans = ""
for i in range(len(s)):
    ans =  str(s[i]) + ans
print(ans)

Fixed code:
n = int(input())
s = []
div = -2
i = 0
while n!=0:
    r = n % div
    if r == 0:
        s.append(0)
    else:
        s.append(1)
        n -= (-2) ** i
    div *= 2
    i += 1
ans = ""
for i in range(len(s)):
    ans =  str(s[i]) + ans
if ans != "":
    print(ans)
else:
    print(0)
Buggy code:
from itertools import permutations


class Solver(object):
    def __init__(self):
        self.n = int(input())

    def solve(self):
        number_string = ""
        n = self.n
        while True:
            remainder = abs(n % (-2))
            number_string = str(remainder) + number_string
            quotient = n // (-2)
            if quotient == 0:
                break
            n = quotient
        if number_string == "":
            print("0")
        else:
            print(number_string.lstrip("0"))


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

Fixed code:
from itertools import permutations


class Solver(object):
    def __init__(self):
        self.n = int(input())

    def solve(self):
        number_string = ""
        n = -self.n
        while True:
            remainder = abs(n % (-2))
            number_string = str(remainder) + number_string
            quotient = n // (-2)
            if quotient == 0:
                break
            n = quotient
        if (number_string == "") or (number_string == "0"):
            print("0")
        else:
            print(number_string.lstrip("0"))


if __name__ == "__main__":
    s = Solver()
    s.solve()
Buggy code:
n = int(input())
ret = ''
while n > 0:
  d, r = n / (-2), n % (-2)
  if r == -1: # (d+1) * (-2) + 1 = n
    r = 1
    d += 1
  ret += str(r)
  n = d
if ret == '':
  ret = '0'
else:
  ret = ret[::-1]
print(ret)
  

Fixed code:
n = int(input())
ret = ''
while n != 0:
  d, r = n // (-2), n % (-2)
  if r == -1: # (d+1) * (-2) + 1 = n
    r = 1
    d += 1
  ret += str(r)
  n = d
if ret == '':
  ret = '0'
else:
  ret = ret[::-1]
print(ret)
Buggy code:
import itertools
N = int(input())

ans = []
while N !=0:
    ans.append(N%2)
    N = -(N-N%2)//2
print("".join(list(map(str,ans))))

Fixed code:
import itertools
N = int(input())

if N == 0:
    print(0)
    exit()
ans = []
while N !=0:
    ans.append(N%2)
    N = -(N-N%2)//2
ans.reverse()
print("".join(list(map(str,ans))))
Buggy code:
import sys


def solve():
    readline = sys.stdin.buffer.readline
    mod = 10 ** 9 + 7
    n = int(readline())
    if n == 0:
        print(0)
    else:
        ans = []
        while n:
            if n % -2 == 0:
                ans.append("0")
                n //= -2
            else:
                ans.append("1")
                n //= -2
        ans.reverse()
        print("".join(ans))


if __name__ == '__main__':
    solve()


Fixed code:
import sys


def solve():
    readline = sys.stdin.buffer.readline
    mod = 10 ** 9 + 7
    n = int(readline())
    if n == 0:
        print(0)
    else:
        ans = []
        while n:
            if n % -2 == 0:
                ans.append("0")
                n //= -2
            else:
                ans.append("1")
                n //= -2
                n += 1
        ans.reverse()
        print("".join(ans))


if __name__ == '__main__':
    solve()
Buggy code:
n = int(input())
res = ""
cnt = 0
div = 0
while n != 0:
    div = n % 2**(cnt+1)
    div = 1 if div > 0 else 0
    res = str(div) + res
    if div > 0:
        n -= (-2) ** cnt
    cnt += 1
print(res)

Fixed code:
n = int(input())
res = ""
cnt = 0
div = 0
if n == 0:
    print(0)
else:
    while n != 0:
        div = n % 2**(cnt+1)
        div = 1 if div > 0 else 0
        res = str(div) + res
        if div > 0:
            n -= (-2) ** cnt
        cnt += 1
    print(res)
Buggy code:

flaga=True
S='1'
N=int(input())
D=N
flag=0
p=1
K=0
if N==0:
    print(0)
    exit(0)
elif N==1:
    print(1)
    exit(0)
elif N>0:
    D-=1
    while flag==0:
        if D+1-p>0:
            D-=p
            p*=4
            K+=2
        else:
            print(D)
            for i in range(K):
                if D<p//2:
                    if flaga==True:
                        S +='1'
                    else:
                        S +='0'
                else:
                    D-=p//2
                    if flaga==True:
                        S +='0'
                    else:
                        S +='1'
                p=p//2
                flaga = not flaga
            print(S)
            exit(0)
else:
    D=abs(D)-2
    while flag==0:
        if D+1-p>0:
            D-=p
            p*=4
            K+=2
            print(D,p)
        else:
            p*=2
            print(D)
            for i in range(K+1):
                if D<p//2:
                    if flaga==True:
                        S +='1'
                    else:
                        S +='0'
                else:
                    D-=p//2
                    if flaga==True:
                        S +='0'
                    else:
                        S +='1'
                p=p//2
                flaga = not flaga
            print(S)
            exit(0)







Fixed code:
import math
flaga=True
S='1'
N=int(input())
D=N
flag=0
p=1
K=0
if N==0:
    print(0)
    exit(0)
elif N==1:
    print(1)
    exit(0)
elif N>0:
    D-=1
    while flag==0:
        if D+1-p>0:
            D-=p
            p*=4
            K+=2
        else:
            #print(D)
            for i in range(K):
                if D<p//2:
                    if flaga==True:
                        S +='1'
                    else:
                        S +='0'
                else:
                    D-=p//2
                    if flaga==True:
                        S +='0'
                    else:
                        S +='1'
                p=p//2
                flaga = not flaga
                #print(D,flaga,p)
            print(S)
            exit(0)
else:
    D=abs(D)-1
    p+=1
    while flag==0:
        if D-p>=0:
            D-=p
            p*=4
            K+=2
            #print(D,p)
        else:
            #print(D,K)
            for i in range(K+1):
                if D<p//2:
                    if flaga==True:
                        S +='1'
                    else:
                        S +='0'

                else:
                    D-=p//2
                    if flaga==True:
                        S +='0'
                    else:
                        S +='1'
                flaga = not flaga
                p=p//2

            print(S)
            exit(0)
Buggy code:
n=int(input())
x=""
while n!=0:
  x=str(n%2)+x
  n=-(n//2)
print(0 if n==0 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:
n=int(input())
s=0
k=0
ans=[]
while n!=0:
  if k%2==0:
    x=n%(2**(k+1))
    if x==0:
      ans.append('0')
    else:
      ans.append('1')
      n-=x
  else:
    x=n%(2**(k+1))
    if x==0:
      ans.append('0')
    else:
      ans.append('1')
      n+=x
  k+=1
print(''.join(ans)[::-1])

Fixed code:
n=int(input())
s=0
k=0
ans=[]
if n==0:
  print(0)
while n!=0:
  if k%2==0:
    x=n%(2**(k+1))
    if x==0:
      ans.append('0')
    else:
      ans.append('1')
      n-=x
  else:
    x=n%(2**(k+1))
    if x==0:
      ans.append('0')
    else:
      ans.append('1')
      n+=x
  k+=1
print(''.join(ans)[::-1])
Buggy code:
def judge(m,i):
    if m==1:
        return 1
    elif m>0:
        if m%(2**i)==0:
            return 0
        else:
            return 1
    else:
        m = -m
        if m%(2**i)==0:
            return 0
        else:
            return 1

def examC():
    n = I()
    N = copy.deepcopy(n)
    i = 0
    ans = []
    while(N!=0):
        cur = judge(N,i+1)
#        print(cur,N)
#        input()
        N -=((-2)**i)*cur
        ans.append(cur)
        i +=1
    print("".join(map(str,ans[::-1])))

import sys,copy,bisect,itertools,heapq,math
from heapq import heappop,heappush,heapify
from collections import Counter,defaultdict,deque
def I(): return int(sys.stdin.readline())
def LI(): return list(map(int,sys.stdin.readline().split()))
def LSI(): return list(map(str,sys.stdin.readline().split()))
def LS(): return sys.stdin.readline().split()
def SI(): return sys.stdin.readline().strip()
mod = 10**9 + 7
inf = float('inf')

examC()

Fixed code:
def judge(m,i):
    if m==1:
        return 1
    elif m>0:
        if m%(2**i)==0:
            return 0
        else:
            return 1
    else:
        m = -m
        if m%(2**i)==0:
            return 0
        else:
            return 1

def examC():
    n = I()
    N = copy.deepcopy(n)
    i = 0
    ans = []
    while(N!=0):
        cur = judge(N,i+1)
#        print(cur,N)
#        input()
        N -=((-2)**i)*cur
        ans.append(cur)
        i +=1
    if not ans:
        ans = [0]
    print("".join(map(str,ans[::-1])))

import sys,copy,bisect,itertools,heapq,math
from heapq import heappop,heappush,heapify
from collections import Counter,defaultdict,deque
def I(): return int(sys.stdin.readline())
def LI(): return list(map(int,sys.stdin.readline().split()))
def LSI(): return list(map(str,sys.stdin.readline().split()))
def LS(): return sys.stdin.readline().split()
def SI(): return sys.stdin.readline().strip()
mod = 10**9 + 7
inf = float('inf')

examC()
Buggy code:
from math import log
n = int(input())
s = ""

for i in range(int(log(abs(n),2))+3):
    #print("i=",i)
    if n % 2**(i+1) == 2**i:
        s = "1" + s
        n -= (-2)**(i)
        #print(i,n)
    else:
        s = "0" + s
if "1" in s:
    for j in s[s.find("1"):]:
        print(j,end = "")
else:
    print(0)

Fixed code:
from math import log
n = int(input())
s = ""
if n != 0:
    for i in range(int(log(abs(n),2))+3):
        #print("i=",i)
        if n % 2**(i+1) == 2**i:
            s = "1" + s
            n -= (-2)**(i)
            #print(i,n)
        else:
            s = "0" + s
    for j in s[s.find("1"):]:
        print(j,end = "")
else:
    print(0)
Buggy code:
n = int(input())
a = []

for _ in range(400):
    if n > 0:
        if n % 2 == 1:
            n = - (n // 2)
            a.append(1)
        else:
            n = -(n // 2)
            a.append(0)
    elif n < 0:
        if (-n) % 2 == 1:
            n = n // (-2) + 1
            a.append(1)
        else:
            n = n // (-2)
            a.append(0)
    
a.reverse()
ans = ''.join([str(n) for n in a])

if n != 0:
    print(ans)
if n == 0:
    print(0)

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

for _ in range(400):
    if n > 0:
        if n % 2 == 1:
            n = - (n // 2)
            a.append(1)
        else:
            n = -(n // 2)
            a.append(0)
    elif n < 0:
        if (-n) % 2 == 1:
            n = n // (-2) + 1
            a.append(1)
        else:
            n = n // (-2)
            a.append(0)
    
a.reverse()
ans = ''.join([str(i) for i in a])

if m != 0:
    print(ans)
else:
    print(0)
Buggy code:
n = int(input())


ans = ""

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

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

print(ans[::-1])


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

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

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

while n!=0:
	x=str(n%2)+x
	n = -(n//2)
if x=='':
	print(0)
else:
	print(x)
Buggy code:
import math, sys
from bisect import bisect_left, bisect_right
from collections import Counter, defaultdict, deque
from copy import deepcopy
from functools import lru_cache
from heapq import heapify, heappop, heappush
from itertools import accumulate, combinations, permutations
input = sys.stdin.readline
mod = 10**9 + 7
ns = lambda: input().strip()
ni = lambda: int(input().strip())
nm = lambda: map(int, input().split())
nl = lambda: list(map(int, input().split()))

n = ni()
ans = ''
while n != 0:
    r = n % 2
    if r < 0:
        r += 2
    n = (n - r) // (-2)
    ans += str(r)
print(ans[::-1])

Fixed code:
import math, sys
from bisect import bisect_left, bisect_right
from collections import Counter, defaultdict, deque
from copy import deepcopy
from functools import lru_cache
from heapq import heapify, heappop, heappush
from itertools import accumulate, combinations, permutations
input = sys.stdin.readline
mod = 10**9 + 7
ns = lambda: input().strip()
ni = lambda: int(input().strip())
nm = lambda: map(int, input().split())
nl = lambda: list(map(int, input().split()))

n = ni()
ans = ''
while n != 0:
    r = n % 2
    if r < 0:
        r += 2
    n = (n - r) // (-2)
    ans += str(r)
if ans == '':
    print(0)
else:
    print(ans[::-1])
Buggy code:
import sys
import math

def resolve():
    N = int(input())
    mods = []
    target = N
    if N == 0:
        print("0")
        return
    while True:
        print(target)
        if target == 1:
            mods.append("1")
            break
        v = target // (-2)
        c = target % (-2)
        if c == -1:
            v += 1
            c = 1
        mods.append(str(c))
        target = v
    mods.reverse()
    print("".join(mods))

if '__main__' == __name__:
    resolve()

Fixed code:
import sys
import math

def resolve():
    N = int(input())
    mods = []
    target = N
    if N == 0:
        print("0")
        return
    while True:
        if target == 1:
            mods.append("1")
            break
        v = target // (-2)
        c = target % (-2)
        if c == -1:
            v += 1
            c = 1
        mods.append(str(c))
        target = v
    mods.reverse()
    print("".join(mods))

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

Fixed code:
N = int(input())
ans = ""
while N:
    if N % 2:
        ans += "1"
        N = -((N - 1) // 2)
    else:
        ans += "0"
        N = -(N // 2)
if len(ans) == 0:
    ans = "0"
print(ans[::-1])
Buggy code:
n=int(input())
s=""
while n:
    print(n)
    s=str(n&1)+s
    n=-(n>>1)
    print(s)
print(s if s else 0)

Fixed code:
n=int(input())
s=""
while n:
    s=str(n&1)+s
    n=-(n>>1)
print(s if s else 0)
Buggy code:
N = int(input())
res = []
while True:
    if N % -2 != 0:
        res.append("1")
    else:
        res.append("0")
    
    if N == 1:
        break

    if N % -2 != 0:
        N -= 1
    N //= -2

print("".join(reversed(res)))

Fixed code:
N = int(input())
res = []
while N != 0:
    if N % -2 != 0:
        res.append("1")
    else:
        res.append("0")
    
    if N == 1:
        break

    if N % -2 != 0:
        N -= 1
    N //= -2

if N != 0:
    print("".join(reversed(res)))
else:
    print(0)
Buggy code:
N = int(input())
S = []
ans = "0"
while(abs(N) > 1):
  S.append(str(abs(-N % (-2))))
  N += N % (-2)
  N = N // (-2)
  
S.append(str(abs(N)))
S.append("1")
S.reverse()

if S == []:
  print(ans)
else:
  ans = ""
  for i in S:
    ans += i
    
  print(ans)
    
  

Fixed code:
N = int(input())
S = []
ans = "0"
while(abs(N) > 0):
  S.append(str(abs(N % (-2))))
  N += N % (-2)
  N = N // (-2)
  
S.reverse()

if S == []:
  print(ans)
else:
  ans = ""
  for i in S:
    ans += i
    
  print(ans)
Buggy code:
import sys
from collections import deque
input = sys.stdin.readline

N = int(input().strip())
ans = deque([])
while N != 0:
    if N % -2 != 0:
        N -= 1
        ans.appendleft('1')
    else:
        ans.appendleft('0')
    N /= -2

print(''.join(ans))

Fixed code:
import sys
from collections import deque
input = sys.stdin.readline

N = int(input().strip())
ans = deque([])
if N == 0:
  print(0)
  exit()
while N != 0:
    if N % -2 != 0:
        N -= 1
        ans.appendleft('1')
    else:
        ans.appendleft('0')
    N /= -2

print(''.join(ans))
Buggy code:
import numpy as np
n = int(input())

def plus_idx(num):
  return 2 * int(np.ceil(np.log2(1 + 3*num)/2)) - 2

def minus_idx(num):
  return 2 * int(np.ceil(np.log2(1 + 3 * abs(num) / 2)/2)) - 1

def return_idx(num):
  if num == 0:
    return 0
  elif num > 0:
    return plus_idx(num)
  else:
    return minus_idx(num)
    
def minus_two_recur(num, l):
  if num == 0:
    return 0, l
  elif num > 0:
    idx = plus_idx(num)
    l[-(idx+1)] = 1
    new_num = num - (-2)**idx
    return new_num, l
  elif num < 0:
    idx = minus_idx(num)
    l[-(idx+1)] = 1
    new_num = num - (-2)**idx
    return new_num, l

num = n
max_length = return_idx(num)
result = [0] * (max_length+1)
result[-max_length-1] = 1
while num != 0:
  num, result = minus_two_recur(num, result)

print("".join(map(str,result)))

Fixed code:
import numpy as np
n = int(input())

def plus_idx(num):
  return 2 * int(np.ceil(np.log2(1 + 3*num)/2)) - 2

def minus_idx(num):
  return 2 * int(np.ceil(np.log2(1 + 3 * abs(num) / 2)/2)) - 1

def return_idx(num):
  if num == 0:
    return 0
  elif num > 0:
    return plus_idx(num)
  else:
    return minus_idx(num)
    
def minus_two_recur(num, l):
  if num == 0:
    return 0, l
  elif num > 0:
    idx = plus_idx(num)
    l[-(idx+1)] = 1
    new_num = num - (-2)**idx
    return new_num, l
  elif num < 0:
    idx = minus_idx(num)
    l[-(idx+1)] = 1
    new_num = num - (-2)**idx
    return new_num, l

num = n
max_length = return_idx(num)
result = [0] * (max_length+1)
while num != 0:
  num, result = minus_two_recur(num, result)

print("".join(map(str,result)))
Buggy code:
# coding: utf-8
# Your code here!

import bisect

N = int(input())

plus = [2 ** x for x in range(0, 35, 2)]
minus = [2 ** x for x in range(1, 35, 2)]

cum_plus = [sum(plus[:x]) for x in range(1, len(plus))]
cum_minus = [sum(minus[:x]) for x in range(1, len(minus))]

flags = []
answer = 0
while answer != N:
    if N - answer > 0:
        insert_index = bisect.bisect_left(cum_plus, N - answer)
        flags.append(insert_index * 2)
        answer += plus[insert_index]
        cum_plus = cum_plus[:insert_index]
    else:
        insert_index = bisect.bisect_left(cum_minus, abs(N - answer))
        flags.append(insert_index * 2 + 1)
        answer -= minus[insert_index]
        cum_minus = cum_minus[:insert_index]
        
output = [0] * (flags[0] + 1)
for flag in flags:
    output[flag] = 1
 
print(''.join([str(x) for x in output[::-1]]))

Fixed code:
# coding: utf-8
# Your code here!

import bisect

N = int(input())

if N == 0:
    print(0)
else:
    plus = [2 ** x for x in range(0, 35, 2)]
    minus = [2 ** x for x in range(1, 35, 2)]
    
    cum_plus = [sum(plus[:x]) for x in range(1, len(plus))]
    cum_minus = [sum(minus[:x]) for x in range(1, len(minus))]
    
    flags = []
    answer = 0
    while answer != N:
        if N - answer > 0:
            insert_index = bisect.bisect_left(cum_plus, N - answer)
            flags.append(insert_index * 2)
            answer += plus[insert_index]
            cum_plus = cum_plus[:insert_index]
        else:
            insert_index = bisect.bisect_left(cum_minus, abs(N - answer))
            flags.append(insert_index * 2 + 1)
            answer -= minus[insert_index]
            cum_minus = cum_minus[:insert_index]
            
    output = [0] * (flags[0] + 1)
    for flag in flags:
        output[flag] = 1
     
    print(''.join([str(x) for x in output[::-1]]))