criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(long long int i=0;i<n;++i)
typedef long long int ll;

int main(){

    ll n;

    cin >> n;
    string ans="";

    if(n) cout << 0 << endl;

    while(n!=0){
        if(n<0){
            if(abs(n)%2==1){
                ans='1'+ans;
                n=abs(n)/2+1;
            }else{
                ans='0'+ans;
                n=abs(n)/2;
            }
        }else{
            if(n%2==1){
                ans='1'+ans;
            }else{
                ans='0'+ans;
            }
            n/=2;
            n*=-1;
        }
        if(n==-1){

        }
    }

    cout <<  << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:38:14: error: expected primary-expression before '<<' token
   38 |     cout <<  << endl;
      |              ^~
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

string base_convert(int d, int base) {
    string res = "";
    string chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    while (d) {
        int r = d % base;
        if (r < 0) r -= base;
        d = (d - r) / base;
        res += chars[r];
        cout << d << " " << r << endl;
    }
    reverse(str.begin(), str.end());
    if (res == "") res = "0";
    return str;
}

int main() {
    int N; cin >> N;
    cout << base_convert(N, -2) << endl;
    return 0;
}

Compiler output:
a.cc: In function 'std::string base_convert(int, int)':
a.cc:16:13: error: 'str' was not declared in this scope; did you mean 'std'?
   16 |     reverse(str.begin(), str.end());
      |             ^~~
      |             std
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int N;

vector<int> vec;

void rec(int N){
  if(N==0) vec.push_back(0);
  else{
  int quo = N/(-2);
  int rem = N%(-2);
  if(rem == -1 && N < 0){
    quo += 1;
    rem += 2;
  }
  // printf("(quo, rem) = (%d, %d)\n",quo,rem);

  vec.push_back(rem);

  if(quo == 1)
    vec.push_back(quo);
  else
    rec(quo);
  }
}

void solve(){
  rec(N);

  reverse(vec.begin(),vec.end());
  
  for(auto itr = vec.begin(); itr!=vec.end(); itr++)  cout << *itr;

  cout << endl;
}

int main(){
  cin >> N;

  solve();
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:33:3: error: 'reverse' was not declared in this scope
   33 |   reverse(vec.begin(),vec.end());
      |   ^~~~~~~
Language: C++

#include <iostream>
#include <cmath>
using namespace std;

string toBinary(long long n)
{
    string s;
    while (n != 0)
    {
        int r = abs(n % 2);
        s += to_string(r);
        n -= r;
        n /= -2;
    }
    reverse(s.begin(), s.end());

    return s;
}

int main()
{
    long long int N;
    cin >> N;

    if (N == 0)
    {
        cout << 0 << endl;
        return 0;
    }

    cout << toBinary(N) << endl;

    return 0;
}

Compiler output:
a.cc: In function 'std::string toBinary(long long int)':
a.cc:15:5: error: 'reverse' was not declared in this scope
   15 |     reverse(s.begin(), s.end());
      |     ^~~~~~~
Language: C++

#include <set>
#include <string>
#include <iostream>
#include <vector>
#include <algorithm>
#include <stack>
#include <queue>
#include <limits>
#include <map>
#include <numeric>

#define ll long long
using namespace std;
static ll imin = std::numeric_limits<ll>::min();
static ll imax = std::numeric_limits<ll>::max();
#define rep(i, n) for(int i = 0; i<n; ++i)
#define rep1(i, n) for(int i = 1; i<n; ++i)
#define debug(x) cout << #x << ":" << x << "\n";
template<class T>
std::ostream& operator << (std::ostream& os, std::vector<T>& vec){
  std::size_t n = vec.size();
  if(n == 0){
    return os;
  }
  for(int i = 0; i<n - 1; ++i){
    os << vec[i] << " ";
  }
  os << vec[n - 1];
  os << std::endl;
  return os;
}

template<class T>
std::istream& operator >> (std::istream& is, std::vector<T>& vec){
  T tmp;
  is >> tmp;
  vec.push_back(tmp);
  return is;
}
template <class T>
auto mkVec(unsigned int x){
  return std::vector<int>(x);
}

template <class T>
auto mkVec2(unsigned int x, unsigned int y){
  return std::vector<std::vector<T>>(x, std::vector<T>(y));
}

template <class T>
auto mkVec3(unsigned int x, unsigned int y, unsigned int z){
  return std::vector<std::vector<std::vector<T>>>(x, std::vector<std::vector<T>>(y, std::vector<T>(z)));
}

// 113C
// #ifndef BOOST_TEST_MAIN
// int main(int const argc, char const** argv){
//   int N, M;
//   cin >> N >> M;
//   vector<ll> P;
//   vector<ll> Y;
//   auto X = mkVec2<ll>(N + 1, 0);
//   rep(i, M){
//     ll p, y;
//     cin >> p >> y;
//     P.push_back(p);
//     Y.push_back(y);
//     X[p].push_back(y);
//   }
//   rep(i, N + 1){
//     sort(X[i].begin(), X[i].end());
//   }
//   rep(i, M) {
//     ll y;
//     rep(j, N + 1){
//       auto x = find(X[j].begin(), X[j].end(), Y[i]);
//       if(x != X[j].end()){
//         y = x - X[j].begin();
//         break;
//       }
//     }
//     printf("%06lld%06lld\n", P[i], y + 1);
//   }
// }
// #endif

#ifndef BOOST_TEST_MAIN
int main(int const argc, char const** argv){
  f();
  ll N;
  cin >> N;
  string rs;
  if(N == 0){
    cout << 0;
  }
  while(1){
    if(N == 0){
      break;
    }if(abs(N) == 1){
      rs = "1" + rs;
      break;
    }
    ll r;

    r = N % 2;
    if(N>0){
      N = N / - 2;
    }else if(N<0 && r){
      N = (N/ - 2) + 1;
    }else{
      N = (N / - 2);
    }
    if(r == 0){
      rs = "0" + rs;
    }else{
      rs = "1" + rs;
    }

  }
  cout << rs;
  
}
#endif


Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:89:3: error: 'f' was not declared in this scope
   89 |   f();
      |   ^
Language: C++

n = int(input())
binary = []
flag = 0

if n == 0:
    print(0)
    flag = 1
    
while n != 0:
    if n % -2 != 0:
        binary.append('1')
        n = n // -2 + 1
    else:
        binary.append('0')
        n = n // -2
        
if flag == 0:
    print(''.join(binary))

Compiler output:
a.cc:18:11: error: empty character constant
   18 |     print(''.join(binary))
      |           ^~
a.cc:1:1: error: 'n' does not name a type
    1 | n = int(input())
      | ^
Language: C++

#include<iostream>
#include <bitset>
#include <sstream>
#include <string>
#include<vector>
using namespace std;

typedef long long ll;

void advance(string &s, int k){
    while(1){
        if(s.size()-1 < k){
            s = s + "1";
            break;
        }

        if(s[k]=='0'){
            s[k] = '1';
            break;
        }
        else{
            s[k] = '0';
            k++;
        }
    }
    return;
}

int main(){
    ll N;
    cin >> N;

    stringstream ss;
    ss << std::bitset<30>(abs(N));
    string two_base_N = ss.str();

    int head_zero_num = 0;
    for(int i=0;i<two_base_N.size();i++){
        if(two_base_N[i] == '1'){
            break;
        }
        head_zero_num++;
    }
    two_base_N.erase(0, head_zero_num);

    reverse(two_base_N.begin(), two_base_N.end());

    for(int i=0;i<two_base_N.size();i++){
        if(N>=0){
            if(i%2==1 && two_base_N[i]=='1'){
                advance(two_base_N, i+1);
            }
        }
        else{
            if(i%2==0 && two_base_N[i]=='1'){
                advance(two_base_N, i+1);
            }
        }
    }
    reverse(two_base_N.begin(), two_base_N.end());
    cout << two_base_N << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:46:5: error: 'reverse' was not declared in this scope
   46 |     reverse(two_base_N.begin(), two_base_N.end());
      |     ^~~~~~~
Language: C++

#include <iostream>
#include <vector>
using namespace std;


int main(){

    int N;
    cin >> N;


    vector<int> S;
    
    do{
        if( N%(-2) == 0 || N%(-2) == 1 ){
            S.push_back( N%(-2) );
            N /= -2;
        }else if( N%(-2) == -1 ){
            S.push_back( N%(-2) + 2 );
            N = N/(-2) + 1;
        }
    }while( N != 0 );
    
    reverse( S.begin(), S.end() );
    for( int i = 0; i < S.size(); i++ ) cout << S[i];
    cout << endl;

    return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:5: error: 'reverse' was not declared in this scope
   24 |     reverse( S.begin(), S.end() );
      |     ^~~~~~~
Language: C++

#include <iostream>
#include <string>
using namespace std;
int main() {
    int n;
    string s = "";
    cin >> n;
    if (n == 0) {
        cout << "0" << endl;
        return;
    }
    while (n != 1) {
        int r = n % -2;
        int q = n / -2;
        if (r == -1) {
            q++;
            r = 1;
        }
      	s = (r ? "1" : "0") + s;
        n = q;
    }
    s = "1" + s;
    cout << s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
   10 |         return;
      |         ^~~~~~
Language: C++

#include <iostream>
#include <string>
#include <cstdlib>
#include <algorithm>
#include <utility>
 
using namespace std;

int power(int n){
if(n==0){return 1;}
else{ return 2*power(n-1);}
}

int main() {

int N;
cin >>N;

int keta[100];

int i=0;

while(N!=0){ //各桁の導出

if(i%2==0){
if( N%power(i+1)==0 ){ keta[i]=0;}
else { keta[i]=1; N=N-power(i);}
}

if(i%2==1){
if( N%power(i+1)==0 ){ keta[i]=0;}
else { keta[i]=1; N=N+power(i);}
}

i++;
}

int l;
l=i-1;

for(int j=l; j>=0; j=j-1){
cout <<keta[j];}

if(N==0){cout <<0:}

}



Compiler output:
a.cc: In function 'int main()':
a.cc:44:18: error: expected ';' before ':' token
   44 | if(N==0){cout <<0:}
      |                  ^
      |                  ;
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)  
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define llong long long
#define pb(a) push_back(a)
#define INF 999999999
using namespace std;
typedef pair<int, int> P;
typedef pair<llong, llong> LP;
typedef pair<int, P> PP;
typedef pair<llong, LP> LPP;

int dy[]={0, 0, 1, -1};
int dx[]={1, -1, 0, 0};

int main(){

  int n;
  cin>>n;
    if(n==0){
    cout<<0<<endl;
    retrn 0;
  }
  bool isMinus = false;
  if(n <0){
    isMinus = true;
    n *= -1;
  }
  int a[33];
  REP(i,33){
    if(n%2==1){
      if(isMinus==false && i%2==0 || isMinus==true && i%2 == 1){
        a[i] = 1;
      }else{
        a[i] = -1;
      }
    }else{
      a[i] = 0;
    }
    n /= 2;
  }


  REP(i,33){
    if(a[i]==2){
      a[i] -= 2;
      a[i+1]--;
    }else if(a[i] <= -1){
      a[i] += 2;
      a[i+1]++;
    }
  }

  bool b = false;
  REPR(i,32){
    if(a[i] == 1)b = true;
    if(b){
      cout<<a[i];
    }
  }
  cout<<endl;




  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:5: error: 'retrn' was not declared in this scope
   26 |     retrn 0;
      |     ^~~~~
Language: C++

#include <iostream>
#include <vector>
#include <string>

using namespace std;

vector<long long> d;
vector<long long> p;

void init_v(int digit) {
        for(int i = 0;i < digit; i++) {
                long long num = (1LL << i);
                if(i % 2 == 1) num *= -1;
                p.push_back(num);
                if(i >= 2) num += d[i - 2];
                d.push_back(num);
        }

}

int get_digit(long long num) {
        for(int i = 0 ;i < d.size(); i++) {
                if(num > 0 && d[i] >= num) return i;
                if(num < 0 && d[i] <= num) return i;
        }
        return -1;
}
int main() {
        long long num;
        cin >> num;
        string s;
        if(num == 0) s = "0";
        while(num != 0) {
                int r = num % (-2);
                if( r < 0) r += 2;
                s = to_string(r) + s;
                num = (num - r) / -2;
        }
        cout << s << endl;
}
~

Compiler output:
a.cc:41:2: error: expected class-name at end of input
   41 | ~
      |  ^
Language: C++

#include <iostream>
using namespace std;



int main() {
    
    int n; cin >> n;
    string s = "";
    while(n != 0){
        if(n%(-2) != 0){
            n--;
            s += '1';
        }else s += '0';
        n /= -2;
    }
    if( s.size() == 0 ){
        cout << "0" << endl;
        return 0;
    }
    reverse(s.begin(), s.end());
    cout << s << endl;
    cout<<s[1];
    
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:21:5: error: 'reverse' was not declared in this scope
   21 |     reverse(s.begin(), s.end());
      |     ^~~~~~~
Language: C

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdint>
#include <map>
#include <cmath>
#include <cstdlib>
#include <sstream>

#include <boost/range/irange.hpp>
using boost::irange;

using namespace std;

int main()
{
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int64_t n;
    cin >> n;
    
    vector<char> ss;
    ss.reserve(64);
    
    do
    {
        auto dm = div(n, -2L);
        if(dm.rem == -1)
        {
            dm.rem = 1;
            dm.quot += 1;
        }
        ss.push_back(dm.rem + '0');
        n = dm.quot;
    }
    while(n != 0);
    
    copy(ss.rbegin(), ss.rend(), ostream_iterator<char>(cout));
    cout << '\n';

    return 0;
}


Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  int N;
  cin >>N;
  if(N == 0){
    cout << 0 << endl;
    retunr 0;
  }
  string ans="";
  while(N != 0){
    if(n%2 = 1){
      ans = "1"+ans;
      N = (N-1)/(-2);
    }
    else{
      ans += "0"+ans;
      N = N/(-2);
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'retunr' was not declared in this scope
    9 |     retunr 0;
      |     ^~~~~~
a.cc:13:8: error: 'n' was not declared in this scope
   13 |     if(n%2 = 1){
      |        ^
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cstdio>
#include <cstring>
#include <string>
#include <math.h>
using namespace std;
typedef long long ll;
typedef double D;
typedef pair<int,int> P;
#define M 1000000007
#define F first
#define S second
#define PB push_back
#define INF 100000000000000000
void YES(bool anser){
    if(anser)printf("YES\n");
    else printf("NO\n");
}
void Yes(bool anser){
    if(anser)printf("Yes\n");
    else printf("No\n");
}
void yes(bool anser){
    if(anser)printf("yes\n");
    else printf("no\n");
}
ll n,k;
bool p[1000];
vector<int>ans;
int main(void){
    cin>>n;
    while(n){
        if(n%2){
            ans.PB(1);
            if(k%2)ans++;
            else ans--;
        }else ans.PB(0);
        n/=2;
    }
    for(int i=0;i<ans.size();i++)cout<<ans[i];
    cout<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:41:23: error: no 'operator++(int)' declared for postfix '++' [-fpermissive]
   41 |             if(k%2)ans++;
      |                    ~~~^~
a.cc:42:21: error: no 'operator--(int)' declared for postfix '--' [-fpermissive]
   42 |             else ans--;
      |                  ~~~^~
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
using namespace std;

int main()
{
	int n;
	cin >> n;
	vector<int> m(40);
	int p = abs(n);
	int k = abs(log10(p) / log10(2))+1;

	for (int i = k; i >= 1; i--) {
		if (p>= exp2(i-1)) {
			m.at(i) = 1;
			p -= exp2(i-1);
		}
		else {
			m.at(i) = 0;
		}
	}
	int kk = 0;
	if (n > 0) {
		for (int i = 1; i <= k+2; i++) {
			if (m.at(i) == 2) {
				m.at(i) = 0;
				if (m.at(i+1) == 1 || m.at(i+1) == 0) {
					m.at(i + 1) += 1;
					kk++;
				}
				else m.at(i + 1) = 1;
			}
			if (i % 2 == 0 && m.at(i) == 1) {
				if (m.at(i + 1) == 1 || m.at(i + 1) == 0) {
					m.at(i + 1) += 1;
					kk++;
				}
				else m.at(i + 1) = 1;
			}
		}
		for (int i = k; i >= 1; i--) {
			cout << m.at(i);
		}
		cout << endl;
	}
	else if (n < 0) {
		for (int i = 1; i <= k+2; i++) {
			if (m.at(i) == 2) {
				m.at(i) = 0;
				if (m.at(i) == 1 || m.at(i) == 0) {
					m.at(i + 1) += 1;
					kk++;
				}
				else m.at(i + 1) = 1;
			}
			if (i % 2 == 1 && m.at(i) == 1) {
				if (m.at(i + 1) == 1 || m.at(i + 1) == 0) {
					m.at(i + 1) += 1;
					kk++;
				}
				else m.at(i + 1) = 1;
			}
		}
		for (int i = k+kk; i >= 1; i--) {
			cout << m.at(i);
		}
		cout << endl;
	}
	else {
		cout << 0 << endl;
	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:21: error: 'log10' was not declared in this scope
   13 |         int k = abs(log10(p) / log10(2))+1;
      |                     ^~~~~
a.cc:16:25: error: 'exp2' was not declared in this scope
   16 |                 if (p>= exp2(i-1)) {
      |                         ^~~~
Language: C++

#include<iostream>
#include<string>
using namespace std;

long abs(long a){
  return a < 0 ? -a : a;
}

int main(){
  long n;
  cin >> n;
  string s = "";
  while(n!=0){
    long mod = abs(n) % 2;
    s = to_string(mod) + s; 
    n = (n - mod) / -2;
  }
  cout << s << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:14:19: error: call of overloaded 'abs(long int&)' is ambiguous
   14 |     long mod = abs(n) % 2;
      |                ~~~^~~
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/ext/string_conversions.h:43,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/stdlib.h:980:12: note: candidate: 'int abs(int)'
  980 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
      |            ^~~
a.cc:5:6: note: candidate: 'long int abs(long int)'
    5 | long abs(long a){
      |      ^~~
In file included from /usr/include/c++/14/cstdlib:81:
/usr/include/c++/14/bits/std_abs.h:137:3: note: candidate: 'constexpr __float128 std::abs(__float128)'
  137 |   abs(__float128 __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:85:3: note: candidate: 'constexpr __int128 std::abs(__int128)'
   85 |   abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:79:3: note: candidate: 'constexpr long double std::abs(long double)'
   79 |   abs(long double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:75:3: note: candidate: 'constexpr float std::abs(float)'
   75 |   abs(float __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:71:3: note: candidate: 'constexpr double std::abs(double)'
   71 |   abs(double __x)
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:61:3: note: candidate: 'long long int std::abs(long long int)'
   61 |   abs(long long __x) { return __builtin_llabs (__x); }
      |   ^~~
/usr/include/c++/14/bits/std_abs.h:56:3: note: candidate: 'long int std::abs(long int)'
   56 |   abs(long __i) { return __builtin_labs(__i); }
      |   ^~~
Language: C++

#include <iostream>
#include <vector>
#include <queue>
#include <cmath>
#include <bitset>

#define rep(i, N) for(int (i) = 0; (i) < (N); (i) ++)
typedef long long ll;
using namespace std;

/*
 * 3 = -2(-1) + 1.
 * -3 = -2(1) -1.
 * アルゴリズムはわからんが基本，商を切り捨てで求めてからそれとの積との差が
 * 割り算になるようだ.よってあまりが-1になったり1になったりする.
 */

int main(){
    int N;
    cin >> N;
    string ans = "";
    do{
        int r;
        r = abs(N % (-2));
        N -= r;
        ans += char(r + '0');
        N /= (-2);
    }while(N);

    reverse(ans.begin(), ans.end());
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:5: error: 'reverse' was not declared in this scope
   30 |     reverse(ans.begin(), ans.end());
      |     ^~~~~~~
Language: C++

#include <algorithm>
#include <iostream> 
#include <string>
#include <cstdio>
#include <vector>
#include <cmath>
using namespace std;


int main(){
    int n;
    cin>>n;
    vector<int>v;
    v.clear();
    while(n){
        int t;
        if(n & 1)t = 1;
        else t = 0;
        v.push_back(t);
        n-=t;
        n/=-2;
    }
    reverse(v.begin(), v.end());
    for(int i = ; i < v.size(); ++i)cout << v[i];
    cout << endl;
    //cout << n/2 << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:17: error: expected primary-expression before ';' token
   24 |     for(int i = ; i < v.size(); ++i)cout << v[i];
      |                 ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  int n;
  string s="";
  cin>>n;
  while(n){
    if(n%-2){
      s+="1";
    }else{
      s+="0";
    }
    n/=-2;
  }
 if(s==""){
   cout<<0<<endl;
   return 0;
 }
  for(int i=.size()-1;i>=0;i--){
    cout<<s[i];
  }
  cout<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:13: error: expected primary-expression before '.' token
   20 |   for(int i=.size()-1;i>=0;i--){
      |             ^
Language: C++

int main() {
  int N; cin >> N;
  string str = "";
  while (N != 0) {
    /* N を 2 で割ったあまりを求める */
    int r = N % 2;
    if (r < 0) r += 2; // N がマイナスだと r がマイナスになったりするので 2 を足す

    /* N から余りを取り除いて -2 で割る */
    N = (N - r) / (-2);

    /* 答えに追加 */
    str += (char)('0' + r);
  }
  /* 向きが逆なので反転 */
  reverse(str.begin(), str.end());
  if (str == "") str = "0"; // N = 0 のときは空文字列になってしまうので例外処理
  cout << str << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:10: error: 'cin' was not declared in this scope
    2 |   int N; cin >> N;
      |          ^~~
a.cc:3:3: error: 'string' was not declared in this scope
    3 |   string str = "";
      |   ^~~~~~
a.cc:13:5: error: 'str' was not declared in this scope; did you mean 'std'?
   13 |     str += (char)('0' + r);
      |     ^~~
      |     std
a.cc:16:11: error: 'str' was not declared in this scope; did you mean 'std'?
   16 |   reverse(str.begin(), str.end());
      |           ^~~
      |           std
a.cc:16:3: error: 'reverse' was not declared in this scope
   16 |   reverse(str.begin(), str.end());
      |   ^~~~~~~
a.cc:18:3: error: 'cout' was not declared in this scope
   18 |   cout << str << endl;
      |   ^~~~
a.cc:18:18: error: 'endl' was not declared in this scope
   18 |   cout << str << endl;
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
    
#define int long long
    
#define REP(i,n) for(int i=0;i<n;i++)
#define FOR(i,m,n) for(int i=m;i<n;i++)
#define FORR(i,m,n) for(int i=m;i>=n;i--)
#define pb(x) push_back(x) 
#define SORT(x) sort((x).begin(),(x).end())
#define INF 99999999999
    
using namespace std;
    
int dy[4]={1, -1, 0, 0};
int dx[4]={0, 0, 1, -1};

int32_t main(){
    int n;
    cin >> n;

    if(n==0) cout << 0;

    bool f=0;
    string str="";
    for(; abs(n)>=1;){
        if(n%(-2)){
            n--;
            str="1"+str;
            f=1;
        }
        else if(f){
            str="0"+str;
        }
        n/=2;
    }
    cout << str << endl;
}#include <bits/stdc++.h>
    
#define int long long
    
#define REP(i,n) for(int i=0;i<n;i++)
#define FOR(i,m,n) for(int i=m;i<n;i++)
#define FORR(i,m,n) for(int i=m;i>=n;i--)
#define pb(x) push_back(x) 
#define SORT(x) sort((x).begin(),(x).end())
#define INF 99999999999
    
using namespace std;
    
int dy[4]={1, -1, 0, 0};
int dx[4]={0, 0, 1, -1};

int32_t main(){
    int n;
    cin >> n;

    if(n==0) cout << 0;

    bool f=0;
    string str="";
    for(; abs(n)>=1;){
        if(n%(-2)){
            n--;
            str="1"+str;
            f=1;
        }
        else if(f){
            str="0"+str;
        }
        n/=2;
    }
    cout << str << endl;
}

Compiler output:
a.cc:37:2: error: stray '#' in program
   37 | }#include <bits/stdc++.h>
      |  ^
a.cc:37:3: error: 'include' does not name a type
   37 | }#include <bits/stdc++.h>
      |   ^~~~~~~
a.cc:50:5: error: redefinition of 'long long int dy [4]'
   50 | int dy[4]={1, -1, 0, 0};
      |     ^~
a.cc:14:5: note: 'long long int dy [4]' previously defined here
   14 | int dy[4]={1, -1, 0, 0};
      |     ^~
a.cc:51:5: error: redefinition of 'long long int dx [4]'
   51 | int dx[4]={0, 0, 1, -1};
      |     ^~
a.cc:15:5: note: 'long long int dx [4]' previously defined here
   15 | int dx[4]={0, 0, 1, -1};
      |     ^~
a.cc:53:9: error: redefinition of 'int32_t main()'
   53 | int32_t main(){
      |         ^~~~
a.cc:17:9: note: 'int32_t main()' previously defined here
   17 | int32_t main(){
      |         ^~~~
Language: C++

#include<cmath>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int n,m;
char z[20]={'0','1','2','3','4','5','6','7','8','9','A','b','C','D','E','F','G','H','I','J'};
void turn(int n)
{
    if (n==0) return;
    else
	{
        if (n>0||n%(-2)==0)
		{
			turn(n/(-2),(-2));
			cout<<z[n%(-2)];
			return;
		}
        else
		{
			turn(n/(-2)+1);
			cout<<z[2+n%(-2)];
			return;
		}
    }
}
int main()
{
    cin>>n;
    turn(n);
    return 0;
}

Compiler output:
a.cc: In function 'void turn(int)':
a.cc:16:29: error: too many arguments to function 'void turn(int)'
   16 |                         turn(n/(-2),(-2));
      |                         ~~~~^~~~~~~~~~~~~
a.cc:9:6: note: declared here
    9 | void turn(int n)
      |      ^~~~
Language: C++

#include<cmath>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int n,m;
char z[20]={'0','1','2','3','4','5','6','7','8','9','A','b','C','D','E','F','G','H','I','J'};
void turn(int n)
{
    if (n==0) return;
    else
	{
        if (n>0||n%(-2)==0)
		{
			turn(n/(-2),(-2));
			cout<<z[n%(-2)];
			return;
		}
        else
		{
			turn(n/(-2)+1);
			cout<<z[2+n%(-2)];
			return;
		}
    }
}
int main()
{
    cin>>n;
    turn(n,-2);
    return 0;
}

Compiler output:
a.cc: In function 'void turn(int)':
a.cc:16:29: error: too many arguments to function 'void turn(int)'
   16 |                         turn(n/(-2),(-2));
      |                         ~~~~^~~~~~~~~~~~~
a.cc:9:6: note: declared here
    9 | void turn(int n)
      |      ^~~~
a.cc: In function 'int main()':
a.cc:31:9: error: too many arguments to function 'void turn(int)'
   31 |     turn(n,-2);
      |     ~~~~^~~~~~
a.cc:9:6: note: declared here
    9 | void turn(int n)
      |      ^~~~
Language: C++

#include<iostream> 
int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:31: error: 'string' was not declared in this scope
    2 | int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}
      |                               ^~~~~~
a.cc:2:31: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:2:49: error: 'a' was not declared in this scope
    2 | int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}
      |                                                 ^
a.cc:2:79: error: 'a' was not declared in this scope
    2 | int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}
      |                                                                               ^
a.cc:2:130: error: 'a' was not declared in this scope
    2 | int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}
      |                                                                                                                                  ^
a.cc:2:150: error: 'a' was not declared in this scope
    2 | int main(){long n;std::cin>>n;string a="";if(!n)a="0";else{while(n!=1){n%(-2)?a='1'+a:a='0'+a;if(n%2&&n<0)n=(-n)/2+1;else n/=-2;}a='1'+a;}std::cout<<a;}
      |                                                                                                                                                      ^
Language: C++

#include <iostream>
using namespace std;
int main(){


    int n;
    cin>>n;
    int ans[10000];
    int i=0;
    if(n==0){
        cout<<0;
        return 0;
    }
    
while(n!=1){
        if(n%2==0){
            n=n/(-2);
           
            ans[i]=0;
            
           // cout<<n<<ans[i]<<endl;
            i++;
            
        }else{
            n=(n-1)/(-2);
       
            ans[i]=1;
          //  cout<<n<<ans[i]<<endl;
            i++;
                      }
    ans[i]=1;
        }
    while(i>=0){
        cout<<ans[i];
        i--;
        
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:37:6: error: expected '}' at end of input
   37 |     }
      |      ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C

#include<stdio.h>
int main()
{
	int i,n;
	scanf("%d",&n);
	for(i=0;i++){
		if(n%(-2)==0 && n!=0){
			S = "0"+S;
		}if(n%(-2)!=0 && n!=1){
			S = "1"+S;
			n = n - 1;
		}if(n==0 || n==1){
			S = "1"+S;
			break;
		}
		n = n/(-2);
	}
	printf("S");
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:20: error: expected ';' before ')' token
    6 |         for(i=0;i++){
      |                    ^
      |                    ;
main.c:8:25: error: 'S' undeclared (first use in this function)
    8 |                         S = "0"+S;
      |                         ^
main.c:8:25: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
int main()
{
	long i,n;
	char S;
	scanf("%d",&n);
	while(1){
		if(n%(-2)==0 && n!=0){
			S = "0"S;
		}if(n%(-2)!=0 && n!=1){
			S = "1"S;
			n = n - 1;
		}if(n==0 || n==1){
			S = "1"S;
			break;
		}
		n = n/(-2);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    9 |                         S = "0"S;
      |                           ^
main.c:9:32: error: expected ';' before 'S'
    9 |                         S = "0"S;
      |                                ^
      |                                ;
main.c:11:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   11 |                         S = "1"S;
      |                           ^
main.c:11:32: error: expected ';' before 'S'
   11 |                         S = "1"S;
      |                                ^
      |                                ;
main.c:14:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   14 |                         S = "1"S;
      |                           ^
main.c:14:32: error: expected ';' before 'S'
   14 |                         S = "1"S;
      |                                ^
      |                                ;
Language: C

#include<stdio.h>
int main()
{
	long i,n;
	char S;
	scanf("%d",&n);
	while(1){
		if(n%(-2)==0 && n!=0){
			S = 0S;
		}if(n%(-2)!=0 && n!=1){
			S = 1S;
			n = n - 1;
		}if(n==0 || n==1){
			S = 1S;
			break;
		}
		n = n/(-2);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:29: error: invalid suffix "S" on integer constant
    9 |                         S = 0S;
      |                             ^~
main.c:11:29: error: invalid suffix "S" on integer constant
   11 |                         S = 1S;
      |                             ^~
main.c:14:29: error: invalid suffix "S" on integer constant
   14 |                         S = 1S;
      |                             ^~
Language: C

#include<stdio.h>
int main()
{
	long i,n;
	char S;
	scanf("%d",&n);
	while(){
		if(n%(-2)==0 && n!=0){
			S = "0" + S;
		}if(n%(-2)!=0 && n!=1){
			S = "1" + S;
			n = n - 1;
		}if(n==0 || n==1){
			S = "1" + S;
			break;
		}
		n = n/(-2);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:15: error: expected expression before ')' token
    7 |         while(){
      |               ^
main.c:9:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    9 |                         S = "0" + S;
      |                           ^
main.c:11:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   11 |                         S = "1" + S;
      |                           ^
main.c:14:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   14 |                         S = "1" + S;
      |                           ^
Language: C

#include<stdio.h>
int main()
{
	int i;
	long n;
	char S;
	scanf("%d",&n);
	while{
		if(n%(-2)==0 && n!=0){
			S = "0" + S;
		}if(n%(-2)!=0 && n!=1){
			S = "1" + S;
			n = n - 1;
		}if(n==0 || n==1){
			S = "1" + S;
			break;
		}
		n = n/(-2);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:14: error: expected '(' before '{' token
    8 |         while{
      |              ^
      |              (
main.c:10:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   10 |                         S = "0" + S;
      |                           ^
main.c:12:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   12 |                         S = "1" + S;
      |                           ^
main.c:15:27: error: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
   15 |                         S = "1" + S;
      |                           ^
Language: C++

#include<stdio.h>

int main(){
	int i,N,S[M],rent;

	//入力
	scanf("%d",&N);

	//処理
	if(N==1){printf("1\n");return 0;}
	if(N==0){printf("0\n");return 0;}
	for(i=0;;i++){
		rent = N % (-2);
		N = N/(-2);
		if(rent==-1){
			rent = 1;
			N++;
		}
		S[i]=rent;
		if((N==1)||(N==0)) break;
	}
	i++;
	S[i]=N;
	//出力
	for(int j=0;j<=i;j++) printf("%d",S[i-j]);
	printf("\n");

	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:4:19: error: 'M' was not declared in this scope
    4 |         int i,N,S[M],rent;
      |                   ^
a.cc:19:17: error: 'S' was not declared in this scope
   19 |                 S[i]=rent;
      |                 ^
a.cc:23:9: error: 'S' was not declared in this scope
   23 |         S[i]=N;
      |         ^
Language: C++

#include<iostream>
#include<string>
	using namespace std;

	int main() {
		int n;
		cin >> n;
		string ans = "";
		while (n != 0) {
			if (n % 2 == 1) {
				n--;
				ans = "1" + ans;
			}
			else ans = "0" + ans;
			n /= -2;
		}
		if (ans == "")ans = "0";
		cout << ans << endl;
	}
}

Compiler output:
a.cc:20:1: error: expected declaration before '}' token
   20 | }
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <math.h>
using namespace std;

int main () {
  int n;
  cin >> n;
  vector<int> two(32);
  for (int i = 0; i < 32; i++) {
    two[i] = 0;  
  }  
  int sub = 1;
  int i = 0;
  while (1) {
    if (n == 0) {
      break;  
    }
    sub = sub * 2;
    int subsub = (n < 0) ? -1*n : n;
    if (subsub % sub != 0 || subsub < sub) {
      two[i] = 1;
      if (i % 2 == 0) {
        n = n - pow(2,i);   
      }   
      else {
        n = n + pow(2,i);  
      }  
      two[i] = 1;
    }  
    i++;
  }
  int l = -1;
  reverse(two.begin(), two.end());
  for (int i = 0; i < 32; i++) {
    if (two[i] == 1) {
      cout << two[i];  
      l = 1;
    }  
    else {
      if (l == 1) {
        cout << two[i];  
      }    
    }
  }
  if (l < 0) {
    cout << 0 << endl;  
  }
  else {
    cout << endl;  
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:3: error: 'reverse' was not declared in this scope
   34 |   reverse(two.begin(), two.end());
      |   ^~~~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b)  for(int i=(int)(a);i<(int)(b);i++)
#define REP(i,n)    FOR(i,0,n)
#define ALL(a)      a.begin(),a.end()
#define vi          vector<int>
#define vvi         vector<vi>
#define P           pair<int,int>
#define vP          vector<P>
#define vvP         vector<vP>

int main(){
    int n;cin>>n;
    string s;
    if(n==0)s="0";
    while(n!=0){
        int temp=n%-2>=0?n%-2:n%-2+2;
        cerr<<n<<"\t"<<temp<<endl;
        s+=to_string(temp);
        n-=temp;
        n/=-2;
    }
    reverse(ALL(s));
    cout<<s<<endl;
    return 0;
}
#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b)  for(int i=(int)(a);i<(int)(b);i++)
#define REP(i,n)    FOR(i,0,n)
#define ALL(a)      a.begin(),a.end()
#define vi          vector<int>
#define vvi         vector<vi>
#define P           pair<int,int>
#define vP          vector<P>
#define vvP         vector<vP>

int main(){
    int n;cin>>n;
    string s;
    if(n==0)s="0";
    while(n!=0){
        int temp=n%-2>=0?n%-2:n%-2+2;
        cerr<<n<<"\t"<<temp<<endl;
        s+=to_string(temp);
        n-=temp;
        n/=-2;
    }
    reverse(ALL(s));
    cout<<s<<endl;
    return 0;
}


Compiler output:
a.cc:42:5: error: redefinition of 'int main()'
   42 | int main(){
      |     ^~~~
a.cc:14:5: note: 'int main()' previously defined here
   14 | int main(){
      |     ^~~~
Language: C++

#include <iostream>
#include <string>
#include <cmath>
using namespace std;

long long N; string S;

int main() {
	cin >> N;
	while (N != 0) {
		if (N % 2 == 1 || N % 2 == -1) { N--; S += "1"; }
		else { S += "0"; }
		N /= -2;
	}
	reverse(S.begin(), S.end());
	cout << S << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'reverse' was not declared in this scope
   15 |         reverse(S.begin(), S.end());
      |         ^~~~~~~
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main()
{
	int n, m=-2;
	string ans = "";
	cin >> n;
	if (n == 0) ans = "0";
	while (n != 0)
	{
		if (n%m == 0)
		{
			ans += '0';
			n /= m;
		}
		else
		{
			ans += '1';
			n = (n - 1) / m;
		}
	}
	reverse(ans.begin(), ans.end());
	cout << ans << '\n';
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:9: error: 'reverse' was not declared in this scope
   25 |         reverse(ans.begin(), ans.end());
      |         ^~~~~~~
Language: C++

#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
int main(void){
    int n,cnt = 0;
    cin >> n;
    vector<int> s(10000000000);
    
    if(n % 2 == 0){
        s[0] = 0;
    }
    else{
        s[0] = 1;
    }
    for(int i = 1;;i++){
        int x = (n % pow(2,i+1));
        if(x == n){
            break;
        }
        if(((s[i-1]*pow(-2,i-1))+s[i]*pow(-2,i)) % pow(2,i+1) == (n % pow(2,i+1))){
            s[i] = 1;
        }
        else{
            s[i] = 0;
        }
        cnt++;
    }
    for(int i = 0;i < (cnt+1);i++){
        cout << s[i];
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:20: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   17 |         int x = (n % pow(2,i+1));
      |                  ~ ^ ~~~~~~~~~~
      |                  |      |
      |                  int    __gnu_cxx::__promote<double>::__type {aka double}
a.cc:21:50: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   21 |         if(((s[i-1]*pow(-2,i-1))+s[i]*pow(-2,i)) % pow(2,i+1) == (n % pow(2,i+1))){
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~
      |                                 |                     |
      |                                 |                     __gnu_cxx::__promote<double>::__type {aka double}
      |                                 __gnu_cxx::__promote<double>::__type {aka double}
a.cc:21:69: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   21 |         if(((s[i-1]*pow(-2,i-1))+s[i]*pow(-2,i)) % pow(2,i+1) == (n % pow(2,i+1))){
      |                                                                   ~ ^ ~~~~~~~~~~
      |                                                                   |      |
      |                                                                   int    __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include<iostream>
using namespace std;
int main(){
  int N;
  cin>>N;
  int S[10000];
  int counter=0;
  while(N!=0){
    if (N%2==1) S[counter]=1;
      else S[counter]=0;
    counter++:
    N/=2;}
  cout<<S;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: expected ';' before ':' token
   11 |     counter++:
      |              ^
      |              ;
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define llong long long
#define pb(a) push_back(a)
#define INF 1000000000
using namespace std;
typedef pair<int, int> P;
typedef pair<llong, llong> LP;
typedef pair<int, P> PP;
typedef pair<llong, LP> LPP;

int dy[]={0, 0, 1, -1, 0};
int dx[]={1, -1, 0, 0, 0};

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  int N;
  cin >> N;
  string ans ="";
  while(N!=0){
    if(N % -2) ans = "1" + ans;
    else ans = "0" + ans;
    N /= 2;
  }
  cout << ans << endl;
  }
}

Compiler output:
a.cc:33:1: error: expected declaration before '}' token
   33 | }
      | ^
Language: C++

#include <iostream>
#include <string> 

int main() {
	int N;cin >> N;
	string S = ((N == 0)?"0":"");
	for (;N!=0;(N-=(abs(N)%2))/=-2)S=((abs(N)%2)?"1":"0")+S;
	cout << S << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:15: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         int N;cin >> N;
      |               ^~~
      |               std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:9: error: 'string' was not declared in this scope
    6 |         string S = ((N == 0)?"0":"");
      |         ^~~~~~
a.cc:6:9: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:7:40: error: 'S' was not declared in this scope
    7 |         for (;N!=0;(N-=(abs(N)%2))/=-2)S=((abs(N)%2)?"1":"0")+S;
      |                                        ^
a.cc:8:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |         cout << S << endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:17: error: 'S' was not declared in this scope
    8 |         cout << S << endl;
      |                 ^
a.cc:8:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |         cout << S << endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
#include <string> 

int main() {
	ll N;cin >> N;
	string S = ((N == 0)?"0":"");
	for (;N!=0;(N-=(abs(N)%2))/=-2)S=((abs(N)%2)?"1":"0")+S;
	cout << S << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'll' was not declared in this scope
    5 |         ll N;cin >> N;
      |         ^~
a.cc:5:14: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         ll N;cin >> N;
      |              ^~~
      |              std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:5:21: error: 'N' was not declared in this scope
    5 |         ll N;cin >> N;
      |                     ^
a.cc:6:9: error: 'string' was not declared in this scope
    6 |         string S = ((N == 0)?"0":"");
      |         ^~~~~~
a.cc:6:9: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:7:40: error: 'S' was not declared in this scope
    7 |         for (;N!=0;(N-=(abs(N)%2))/=-2)S=((abs(N)%2)?"1":"0")+S;
      |                                        ^
a.cc:8:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |         cout << S << endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:17: error: 'S' was not declared in this scope
    8 |         cout << S << endl;
      |                 ^
a.cc:8:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |         cout << S << endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
#include<string>
using namespace std;

int main(){
    int N;
    cin>>N;
    string S;
    int i=0;

    while(N){
        int n=N%(-2);
        S[i]=n;
        i++;
        N/=2;
    }
    reverse(S.begin(),S.end());
    cout<<S<<endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:5: error: 'reverse' was not declared in this scope
   17 |     reverse(S.begin(),S.end());
      |     ^~~~~~~