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

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  vector<int> a(N);
  for(int i=0;i<N;i++){
    cin >> a.at(i);
  }
  vector<int>ans(N,0);
  
  for(int i=N;i>0;i--){
    int acount = a.at(i-1);
    for(int j=i+1;j<=N;j+=i){
      if(a.ans(N) == 1){
        acount += 1;
      }
    }
    if(acount % 2 == 1){
      ans.push_back(i);
    }
  }

  if(ans.size() == 0){
    cout << 0;
  }else{
    int siz = ans.size();
    cout << siz << endl;
    for(int i=0;i<siz;i++){
      if(i > 0){
        cout << " ";
      }
      cout << ans.at(i);
    }
  }
  cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:12: error: 'class std::vector<int>' has no member named 'ans'
   16 |       if(a.ans(N) == 1){
      |            ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  vector<int> a(N);
  for(int i=0;i<N;i++){
    cin >> a.at(i);
  }
  vector<int>ans(0);
  
  for(int i=N;i>=1;i--){
    int acount = 0;
    for(int j=i;j<=N;j+=i){
      if(a.at(j-1) == 1){
        acount += 1;
      }
    }
    if(acount % 2 == 0){
      ans.push_back(i);
    }
  }

  if(ans.size() == 0){
    cout << 0;
  }else{
    int siz = ans.size();
    cout <<  << endl;
    for(int i=0;i<siz;i++){
      if(i > 0){
        cout << " ";
      }
      cout << ans.at(i);
    }
  }


  cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:14: error: expected primary-expression before '<<' token
   29 |     cout <<  << endl;
      |              ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  vector<int> a(N);
  for(int i=0;i<N;i++){
    cin >> a.at(i);
  }
  vector<int>ans(0);
  
  for(int i=N;i>=1;i--){
    int acount = 0;
    for(int j=i;j<=N;j+=i){
      if(a.at(j-1) == 1){
        acount += 1;
      }
    }
    if(acount % 2 == 1){
      ans.push_back(i);
    }
  }

  if(ans.size() == 0){
    cout << 0;
  }else{
    int siz = ans.size();
    cout <<  << endl;
    for(int i=0;i<siz;i++){
      if(i > 0){
//        cout << " ";
      }
      cout << ans.at(i);
    }
  }


  cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:14: error: expected primary-expression before '<<' token
   29 |     cout <<  << endl;
      |              ^~
Language: C++

#include<iostream>
#include<vector>
using namespace std;
int main () {
  int N;
  cin >> N;
  vector<int>a(N);
  for (int i = 0; i < N; i ++) cin >> a[i];
  vector<int>box(N, 0);
  vector<vector<int>>re(N, vector<int>());
  vector<int>ans(N);
  int si = 0;
  for (int i = 1; i <= N / 2; i ++) {
    for (int j = 2; j <= N / i; j ++) {
      int k = i * j - 1;
      re[k].push_back(i - 1);
    }
  }
  for (int i = N - 1; i >= 0; i --) {
    if (box[i] % 2 != a[i]) {
      ans[si] = i + 1;
      si ++;
      for (int j = 0; j < re[i].size(); j ++) {
        box[re[i][j]] ++;
      }
    }
  }
  cout << si << endl;
  if (!si) return 0;
  cout << ans[0] << ' '
  for (int i = 1; i < si; i ++) {
    cout << ' ' << ans[i];
  }
  cout << endl;
}
  
  


Compiler output:
a.cc: In function 'int main()':
a.cc:30:24: error: expected ';' before 'for'
   30 |   cout << ans[0] << ' '
      |                        ^
      |                        ;
   31 |   for (int i = 1; i < si; i ++) {
      |   ~~~                   
a.cc:31:19: error: 'i' was not declared in this scope; did you mean 'si'?
   31 |   for (int i = 1; i < si; i ++) {
      |                   ^
      |                   si
Language: C++

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

int main(){
  int n,a;
  scanf("%d",&n);
  for(int i=1;i<=n;i++)
    scanf("%d",&a);
  printf("-1\n");

Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: expected '}' at end of input
    9 |   printf("-1\n");
      |                  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a[200000],b[200000],s,y;
int main()
{
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
	}
	int m=0;
	for(int i=1;i<=n;i++)
	{
		s=0;
		y=i;
		while(y<=n)
		{
			s+=a[y];
			y*=2;
			if(s>2) 
			{
				cout<<'-1';
				return 0;
			}
		}
		if(a[i]%2!=s)
		{
			m++;
			b[m]=1;
		}
	}
	if(m==0)
	{
		cout<<'0';
	}
	else
	{
		for(i=1;i<=m;i++)
		{
			cout<<b[i]<<' ';
		}
	}
	return 0;
}


Compiler output:
a.cc:23:39: warning: multi-character character constant [-Wmultichar]
   23 |                                 cout<<'-1';
      |                                       ^~~~
a.cc: In function 'int main()':
a.cc:39:21: error: 'i' was not declared in this scope
   39 |                 for(i=1;i<=m;i++)
      |                     ^
Language: C++

N = int(input())
A = list(map(int, input().split()))

B = [0] * N
for _ in range(N-1, -1, -1):
    if A[_] == 1:
        if sum(B[_::_+1]) % 2 == 0:
            B[_] = 1
    else:
        if sum(B[_::_+1]) % 2 == 1:
            B[_] = 1
print(sum(B))
for i, _ in enumerate(B):
    if _ == 1:
        print(i+1)

Compiler output:
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

#include <iostream>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <ctime>
#include <cstring>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <numeric>
#include <utility>
#include <iomanip>
#include <algorithm>
#include <functional>
#include <unordered_map>
using namespace std;
using ll = long long;
const ll mod = 1000000007;
const ll INF = 100000000000000000LL;

signed main(){
    int n;
    cin >> n;
    vector<int> A(n);
    for (int i = 0; i < n;i++)cin >> A[i];
    vector<int> res;
    for (int i = n - 1; i > -1;i--){
        int c = i + 1;
        if (A[i]&1 == 1){
            res.push_back(c);
            for (int k = 1; k < sqrt(c) + 1;k++){
                if (c % k == 0){
                    if (k != c / k){
                        A[k - 1]--;
                        A[c / k - 1]--;
                    }
                    else A[k - 1]--;
                }
            }
        }
    cout << res.size() << endl;
    for (int i = 0; i < res.size();i++){
        cout << res[i] << ' ';
    }
    cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:52:2: error: expected '}' at end of input
   52 | }
      |  ^
a.cc:27:14: note: to match this '{'
   27 | signed main(){
      |              ^
Language: C++

N = int(input())
a = [0]
a += map(int, input().split())

for i in range(N, 0, -1):
    x = 0
    for j in range(i, N, i):
        x ^= a[j]

    a[i] = x

ans = []
for i, ai in enumerate(a):
    if ai == 1:
        ans.append(i)

print(len(ans))
print(" ".join(map(str, ans)))



Compiler output:
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define mem(dp,a)           memset(dp,a,sizeof dp)
#define rep(i,a,b)          for(ll i=a;i<b;i++)
#define pb(x)               push_back(x)
#define mp(x,y)             make_pair(x,y)
#define fastio              ios_base::sync_with_stdio(false);cin.tie(NULL)
#define F                   first
#define S                   second
#define all(v)              (v).begin(),(v).end()
#define pi                  3.14159265359
ll INF=1e18+10;
ll MOD=1000000009;

const int N=2*1e5+10;
bool vis[N];

int main()
{
    fastio;
    int n;cin>>n;
    int a[n+1];
    for(int i=0;i<n;i++)
    cin>>a[i+1];

    for(int i=n;i>0;i--)
    {
        int last=(n/i)*i;
        int c=0;
        for(int j=last;j>0;j-=i)
            if(vis[j]==1)c++;
        if((c%2==0 && a[i]==0) || (c%2==1 && a[i]==1))
            continue;
        else
            vis[i]=1;
    }
    vector<int> v;
    for(int i=1;i<=n;i++)
        if(vis[i])
        v.push_back(i);

    int siz=v.size();
    cout<<siz<<endl;
    for(int i=0;i<siz;i++)
        cout<<v[i]<<" ";
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:9:29: error: 'ios_base' has not been declared
    9 | #define fastio              ios_base::sync_with_stdio(false);cin.tie(NULL)
      |                             ^~~~~~~~
a.cc:22:5: note: in expansion of macro 'fastio'
   22 |     fastio;
      |     ^~~~~~
a.cc:9:62: error: 'cin' was not declared in this scope
    9 | #define fastio              ios_base::sync_with_stdio(false);cin.tie(NULL)
      |                                                              ^~~
a.cc:22:5: note: in expansion of macro 'fastio'
   22 |     fastio;
      |     ^~~~~~
a.cc:9:70: error: 'NULL' was not declared in this scope
    9 | #define fastio              ios_base::sync_with_stdio(false);cin.tie(NULL)
      |                                                                      ^~~~
a.cc:22:5: note: in expansion of macro 'fastio'
   22 |     fastio;
      |     ^~~~~~
a.cc:1:1: note: 'NULL' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
  +++ |+#include <cstddef>
    1 | include <bits/stdc++.h>
a.cc:39:5: error: 'vector' was not declared in this scope
   39 |     vector<int> v;
      |     ^~~~~~
a.cc:39:12: error: expected primary-expression before 'int'
   39 |     vector<int> v;
      |            ^~~
a.cc:42:9: error: 'v' was not declared in this scope
   42 |         v.push_back(i);
      |         ^
a.cc:44:13: error: 'v' was not declared in this scope
   44 |     int siz=v.size();
      |             ^
a.cc:45:5: error: 'cout' was not declared in this scope
   45 |     cout<<siz<<endl;
      |     ^~~~
a.cc:45:16: error: 'endl' was not declared in this scope
   45 |     cout<<siz<<endl;
      |                ^~~~
Language: C++

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

int main()
{
	int n, i;
	cin >> n;
	int a[n+1], s=0;
	for (i=1; i<=n; i++)
	{
		cin >> a[i];
		if (a[i]==1)
			s++;
	}
	if (s==0)
	{
		cout << -1 << endl;
	}
	else
	{
		cout << s << endl;
		for (i=1; i<=s; i++)
			cout << 1 << ' ';
	}
	cout << endl;
	return 0;
}

Compiler output:
a.cc:1:9: fatal error: Bits/stdc++.h: No such file or directory
    1 | #include<Bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(m,x,r) for((m)=(x);(m)<(r);(m)++)
int main(){
    int n,i,m=0;
    cin>>n;
    int a[n+1],ans[n+1];
    for(i,1,n+1)cin>>a[i];
    for(i=n;i>0;i--){
            int buf=0,j;
            rep(j,2,(n+1)/i)buf^=ans[i*j];
            if(a[i]!=buf){
                ans[i]=1;
                m++;
            }
            else ans[i]=0;
    }
    cout<<m<<endl;
    rep(i,1,n+1)if(ans[i])cout<<i<<" ";
    cout<<"\n";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: expected ';' before ')' token
    8 |     for(i,1,n+1)cin>>a[i];
      |                ^
      |                ;
a.cc:9:5: error: expected primary-expression before 'for'
    9 |     for(i=n;i>0;i--){
      |     ^~~
a.cc:8:27: error: expected ';' before 'for'
    8 |     for(i,1,n+1)cin>>a[i];
      |                           ^
      |                           ;
    9 |     for(i=n;i>0;i--){
      |     ~~~                    
a.cc:9:5: error: expected primary-expression before 'for'
    9 |     for(i=n;i>0;i--){
      |     ^~~
a.cc:8:27: error: expected ')' before 'for'
    8 |     for(i,1,n+1)cin>>a[i];
      |        ~                  ^
      |                           )
    9 |     for(i=n;i>0;i--){
      |     ~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(m,x,r) for((m)=(x);(m)<(r);(m)++)
int main(){
    int n,i,m=0;
    cin>>n;
    int a[n+1],ans[n+1];
    for(i,1,n+1)cin>>a[i];
    for(i=n;i>0;i--){
            int buf=0;
            rep(j,2,(n+1)/i)buf^=ans[i*j];
            if(a[i]!=buf){
                ans[i]=1;
                m++;
            }
            else ans[i]=0;
    }
    cout<<m<<endl;
    rep(i,1,n+1)if(ans[i])cout<<i<<" ";
    cout<<"\n";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: expected ';' before ')' token
    8 |     for(i,1,n+1)cin>>a[i];
      |                ^
      |                ;
a.cc:9:5: error: expected primary-expression before 'for'
    9 |     for(i=n;i>0;i--){
      |     ^~~
a.cc:8:27: error: expected ';' before 'for'
    8 |     for(i,1,n+1)cin>>a[i];
      |                           ^
      |                           ;
    9 |     for(i=n;i>0;i--){
      |     ~~~                    
a.cc:9:5: error: expected primary-expression before 'for'
    9 |     for(i=n;i>0;i--){
      |     ^~~
a.cc:8:27: error: expected ')' before 'for'
    8 |     for(i,1,n+1)cin>>a[i];
      |        ~                  ^
      |                           )
    9 |     for(i=n;i>0;i--){
      |     ~~~                    
a.cc:11:17: error: 'j' was not declared in this scope
   11 |             rep(j,2,(n+1)/i)buf^=ans[i*j];
      |                 ^
a.cc:3:25: note: in definition of macro 'rep'
    3 | #define rep(m,x,r) for((m)=(x);(m)<(r);(m)++)
      |                         ^
Language: C++

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

vector<int> yakusu(int n){
  vector<int> result;
  for(int i=1; i*i<=n;i++){
    if(n%i==0){
      result.push_back(i);
      if(i!=n/i){
        result.push_back(n/i);
      }
    }
  }
  return result;
}

int main(){
  int n;
  cin >> n;
  vector<int> a(n+1);
  for(int i=1;i<n+1;i++){
    cin >> a[i];
  }
  
  vector<int> b(n+1, 0);
  for(int i=n;i>0;i--){
    y = yakusu(i);
    for(int e: y){
      b[e] += a[i] ^ b[i];
      b[e] %= 2;
    }
  }
  cout << count(b.begin(), b.end(), 1) << "\n";
  for(int i=1;i<n+1;i++){
    if(b[i]==1){
      cout << i;
    }
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:5: error: 'y' was not declared in this scope
   28 |     y = yakusu(i);
      |     ^
a.cc:34:11: error: 'count' was not declared in this scope
   34 |   cout << count(b.begin(), b.end(), 1) << "\n";
      |           ^~~~~
Language: Java


import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

public class Main {
    public static void main(String [] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int [] a = new int[n + 1];
        for (int i = 1; i <= n; ++i) {
            a[i] = scanner.nextInt();
        }
        int [] box = new int[n + 1];
        Map<Integer, List<Integer>> number = new HashMap<>();
        for (int i = 1; i <= n; ++i) {
            number.put(i, new ArrayList<>());
        }
        for (int i = 1; i <= n; ++i) {
            for (int k = 1; k * i <= n; ++k) {
                number.get(k * i).add(i);
            }
        }
        for (int i = n; i >= 1; --i) {
            box[i] = a[i] % 2;
            for (int k : number.get(i)) {
                a[k] = a[k] % 2 - box[i] % 2 == 0
                ? a[k]
                : 1 - a[k];
            }
        }

        int count = 0;
        for (int i = 1; i <= n; ++i) {
            if (box[i] == 1) {
                ++count;
            }
        }
        System.out.println(count);
        for (int i = 1; i <= n; ++i) {
            if (box[i] == 1) {
                System.out.print(i + " ");
            }
        }
        System.out.println();

    }

Compiler output:
Main.java:49: error: reached end of file while parsing
    }
     ^
1 error
Language: Java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main_D {

	public static void main(String[] args) throws Exception {
		// TODO 自動生成されたメソッド・スタブ
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String W = in.readLine();
		int N = Integer.parseInt(W);

		int[] A = new int[N+1];
		int[] B = new int[N+1];
		Arrays.fill(B,0);

		A[0]=0;
		W = in.readLine();
		String[] Ws = W.split(" ");
		for(int i=1;i<N+1;i++){
			A[i]=Integer.parseInt(Ws[i-1]);
		}

		long num = 0;
		int tmp=0;
		for(int i=A.length-1;i>0;i--){
			tmp=0;
			for(int k = 2*i;k<B.length;k=k+i){
				tmp += B[k];
			}
			if(tmp%2 == A[i]){
				B[i]=0;
			}else{
				B[i]=1;
				num++;
			}
		}

		System.out.println(num);
		for(int i=1;i<N+1;i++){
			if(B[i]==1){
				System.out.println(i);
			}
		}
	}

}


Compiler output:
Main.java:5: error: class Main_D is public, should be declared in a file named Main_D.java
public class Main_D {
       ^
1 error
Language: Java

import java.util.*;

public class D {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int a[] = new int[N];

        for(int i = 0; i < N; i++){
            a[i] = sc.nextInt();
        }

        int b[] = new int[N];
        int count = 0;

        for(int i = N - 1; i >= 0; i--){
            int sum = 0;
            for(int j = i; j < N; j++){
                sum += a[i];
            }
            if(sum % 2 == 1){
                b[i] = i + 1;
            }
        }

        System.out.println(count);
        for(int i = 0; i < count; i++){
            System.out.print(b[i] + " ");
        }

        sc.close();
    }
}

Compiler output:
Main.java:3: error: class D is public, should be declared in a file named D.java
public class D {
       ^
1 error
Language: C++

#include <cstdint>
#include <iostream>
#include <vector>

using namespace std;

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

  vector<long> nums(N+1, 0);
  for (size_t n = 1; n <= N; ++n) cin >> nums[n];
  vector<uint8_t> check(N, 0);
  vector<long> res;
  res.reserve(N);
  for (size_t n = N; n > 0; --n) {
    long sum = 0;
    for (size_t i = 2 * n; i <= N; i += n) {
      if (check[i]) ++sum;
    }
    if ((sum & 1) ^ nums[n] == 1) {
      check[n] = 1;
      res.push_back(n);
    }
  }
  cout << res.size() cout << endl;
  if (res.size() != 0) {
    auto it = res.crbegin();
    cout << *it++;
    for (auto end = res.crend(); it != end; ++it) {
      cout << " " << *it;
    }
    cout << endl;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:21: error: expected ';' before 'cout'
   26 |   cout << res.size() cout << endl;
      |                     ^~~~~
      |                     ;
Language: C++

#include <iostream>
#include <vector>

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

#ifdef DEBUG
    #define IFD if(true)
#else
    #define IFD if(false)
#endif

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

    vector<int> a(N + 1);
    vector<int> b(N + 1, -1);
    vector<int> ans;

    rep(i, N) {
        cin >> a[i + 1];
    }

    for(int i = N; i >= 1; i--) {
        IFD cout << "i: " << i << endl;
        int c = 0;
        for(int j = N / i; j >= 1; j--) {
            int v = j * i;
            IFD cout << v << endl;
            if(i == v) {
                b[v] = a[v] ^ c;
                ans.push_back(v);
                /*
                if(b[v] == 1) {
                    M++;
                }*/
            } else {
                c ^= b[v];
            }
        }
    }
    IFD cout << endl;

    IFD {
        rep(i, N) {
            cout << b[i + 1] << " ";
        }
        cout << endl << endl;
    }

    cout << ans.size() << endl;
    if(ans.size() != 0) {
        rep(i, ans.size) {
            cout << ans[i] << " ";
        }
        cout << endl;
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:56:20: error: invalid use of member function 'std::vector<_Tp, _Alloc>::size_type std::vector<_Tp, _Alloc>::size() const [with _Tp = int; _Alloc = std::allocator<int>; size_type = long unsigned int]' (did you forget the '()' ?)
   56 |         rep(i, ans.size) {
      |                    ^
a.cc:4:44: note: in definition of macro 'rep'
    4 | #define rep(i, n) for(int i = 0; i < (int)(n); i++)
      |                                            ^
Language: C++

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

int main() {
  int n; cin >> n;
  vector<int> a(n+1); rep(i, n) cin >> a[i+1];
  vector<int> b(n+1);
  for (int i = n, i >= 1; --i) {
    int sum = 0;
    for (int j = i * 2; j <= n; j += i) {
      temp ^= b[j];
    }
    b[i] = sum^a[i];
  }
  vector<int> ans;
  rep (i, ans.size()) {
    printf("%d%c", ans[i], i+1==ans.size()?'\n':' ');
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:20: error: expected ';' before '>=' token
   10 |   for (int i = n, i >= 1; --i) {
      |                    ^~~
      |                    ;
a.cc:10:21: error: expected primary-expression before '>=' token
   10 |   for (int i = n, i >= 1; --i) {
      |                     ^~
a.cc:13:7: error: 'temp' was not declared in this scope; did you mean 'tm'?
   13 |       temp ^= b[j];
      |       ^~~~
      |       tm
Language: C++

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

typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(n);i++)
#define rep1(i,n) for(int i=1;i<=(n);i++)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const ll MOD = 1000000007;
//const ll MOD = 998244353;
const double pi = 3.14159265358979323846;
int dx[4] = { -1,0, 1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
// #define mp make_pair
//#define endl '\n'


int main() {
    int n;
    cin >> n;
    vi a(n+1);
    rep1(i,n){
        cin >> a[i];
    }

    vi b(n+1);

    rrep1(i,n){
        int p = n / i;
        int x = 0
        REP(j,1,p+1){
            x += b[i*j];
            x %= 2;
        }
        if(x != a[i])
            b[i]++;
    }

    int sum = 0;
    rep1(i,n){
        if(b[i] == 1)
            sum += 1;
    }
    cout << sum << endl;
    
    bool flag = 0;
    rep1(i,n){
        if(b[i] == 1){
            flag = 1;
            cout << i << ' ';
        }
    }
    if(flag)
        cout << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:20: error: expected ',' or ';' before 'for'
   21 | #define REP(i,a,b) for(int i=a;i<b;i++)
      |                    ^~~
a.cc:48:9: note: in expansion of macro 'REP'
   48 |         REP(j,1,p+1){
      |         ^~~
a.cc:48:13: error: 'j' was not declared in this scope
   48 |         REP(j,1,p+1){
      |             ^
a.cc:21:32: note: in definition of macro 'REP'
   21 | #define REP(i,a,b) for(int i=a;i<b;i++)
      |                                ^
Language: C++

#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<math.h>
using namespace std;
#define N (1000000000+7)
#define INF 1e16
typedef pair<int,int> P;
typedef long long ll;

ll num[200010]={0};

int main(void){
    ll n;
    cin>>n;
    vector<ll>a(n+1),b(n+1),c;
     //cout<<(ll)c.size()<<endl;
    for(ll i=0;i<n;i++)cin>>a[i+1];
    for(ll i=n/2+1;i<=n;i++)b[i]=a[i];
    for(ll i=n/2+1;i<=n;i++){
        for(ll j=1;j<=(ll)sqrt(i);j++){
            if(i%j==0){
                num[i/j]+=b[i];
                if(j!=(i/j))num[j]+=b[i];
            }
        }
    }
    for(ll i=n/2;i>=1;i--){
        if(num[i]%2==0){
            if(a[i]){
                b[i]=1;
                for(ll j=1;j<=(ll)sqrt(i);j++){
                    if(i%j==0){
                        num[i/j]+=b[i];
                        if(j!=(i/j))num[j]+=b[i];
                    }
                }
            }
            else{
                b[i]=0;
            }
        }
        else{
            if(a[i])b[i]=0;
            else{
                b[i]=1;
                for(ll j=1;j<=(ll)sqrt(i);j++){
                    if(i%j==0){
                        num[i/j]+=b[i];
                        if(j!=(i/j))num[j]+=b[i];
                    }
                }
            }
        }
    }
    for(ll i=1;i<=n;i++){
        //cout<<num[i]<<" "<<a[i]<<endl;
        if(num[i]%2!=a[i]){
          	assert(0);
            cout<<-1<<endl;
            return 0;
        }
        else{
            if(num[i]>0)c.push_back(num[i]);
        }
    }
    if((ll)c.size()==0){
        cout<<0<<endl;
        return 0;
    }
    cout<<(ll)c.size()<<endl;
    for(ll i=0;i<(ll)c.size();i++){
        if(i==(ll)c.size()-1)cout<<c[i]<<endl;
        else cout<<c[i]<<" ";
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:64:17: error: 'assert' was not declared in this scope
   64 |                 assert(0);
      |                 ^~~~~~
a.cc:10:1: note: 'assert' is defined in header '<cassert>'; this is probably fixable by adding '#include <cassert>'
    9 | #include<math.h>
  +++ |+#include <cassert>
   10 | using namespace std;
Language: C++

#include <iostream>
using namespace std;
 
int main(void){
    int i, j, n;
    cin >> n ;
    int *a;
    a = new int[n];
    for(i=0; i<n; i++) cin >> a[i];
    
    int m = 0;
    int *b = new int[n];
    int tmp
    for(i=n-1; i>=0; i--){
        for(j=i+1; j<n; j++){
            if((j+1)%(i+1)==0){
                tmp += b[j];
            }
        }
      	if(tmp % 2 == a[i] %2){
          	b[i] = 0;
        }else{
        	b[i] = 1;
            m++;
        }
    }
    cout << m << endl;
    for(i=0; i<m; i++){
        cout << b[i] << endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: expected initializer before 'for'
   14 |     for(i=n-1; i>=0; i--){
      |     ^~~
a.cc:14:25: error: expected ';' before ')' token
   14 |     for(i=n-1; i>=0; i--){
      |                         ^
      |                         ;
Language: C

#include<stdio.h>

int main(){
  int i,j,k;
  int N,tmp;
  scanf("%d",&N);
  int A[N],B[N];
  for(i=0;i<N;i++){
    scanf("%d ",&A[i]);
  }
  
  for(i=N-1;i>(N/2);i--){
    B[i]=A[i];
  }
  for(;i!=-1;i--){
    k=2;
    tmp=0;
    while((i+1)*k <= N){
      tmp+=B[(i+1)*k-1];
      k++;
    }
    if(tmp%2 == A[i])
      B[i]=0;
    else
      B[i]=1;
  }
  int ans=0
  for(i=0;i<N;i++)
    ans+=B[i];
  printf("%d\n",ans);
  for(i=0;i<N;i++){
    if(B[i]==1)
      printf("%d ",i+1);
  }
  puts("");
  return 0;
}
    

Compiler output:
main.c: In function 'main':
main.c:28:3: error: expected ',' or ';' before 'for'
   28 |   for(i=0;i<N;i++)
      |   ^~~
main.c:28:18: error: expected ';' before ')' token
   28 |   for(i=0;i<N;i++)
      |                  ^
      |                  ;
main.c:28:18: error: expected statement before ')' token
Language: C++

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,a,b) for(ll i=a;i<b;++i)
#define rrep(i,a,b) for(ll i=b-1;i>=a;i--)

int main(){
	ll n;
  	cin >> n;
  	vector<ll> a(n + 1);
  	rrep(i, 1, n + 1){
      	for(ll j = i * 2; j <= n; j += i) a[i] ^= a[j];
    }
  	cout << accumulate(a.begin(), a.end()) << endl;
  	rep(i, 1, n + 1) if(a[i]) cout << a[i] << ' ';
  	cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:27: error: no matching function for call to 'accumulate(std::vector<long long int>::iterator, std::vector<long long int>::iterator)'
   14 |         cout << accumulate(a.begin(), a.end()) << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/numeric:62,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:58,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_numeric.h:134:5: note: candidate: 'template<class _InputIterator, class _Tp> _Tp std::accumulate(_InputIterator, _InputIterator, _Tp)'
  134 |     accumulate(_InputIterator __first, _InputIterator __last, _Tp __init)
      |     ^~~~~~~~~~
/usr/include/c++/14/bits/stl_numeric.h:134:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_numeric.h:161:5: note: candidate: 'template<class _InputIterator, class _Tp, class _BinaryOperation> _Tp std::accumulate(_InputIterator, _InputIterator, _Tp, _BinaryOperation)'
  161 |     accumulate(_InputIterator __first, _InputIterator __last, _Tp __init,
      |     ^~~~~~~~~~
/usr/include/c++/14/bits/stl_numeric.h:161:5: note:   candidate expects 4 arguments, 2 provided
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; (i) < (n); ++ (i))
#define loop(i,a,n) for (int i = (a); (i) < (n); ++ (i))
#define ll long long
#define ld long double
#define EPS 0.0000000001
#define INF (int)1e9
#define MOD 0
//#define int ll
using namespace std;
typedef vector<long long> vl;

signed main() {
  int n,m = 0;
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> n;
  vector<int> a(n),b(n,0);
  rep(i,n) {
    cin >> a[i];
  } 
  rep(int i = n-1;i > -1;i--) {
    int sum = 0;
    rep(int j = 2;j*i < n;j++) {
      if(b[i*j] == 1) sum++;
    }
    if(a[i] != sum%2) {
      b[i]++;
      m++;
    }
  }
  cout << m << endl;
  rep(i,n) {
    if(i != 0) cout << ' ';
    if(b[i] == 1) cout << i+1;
  }
  cout << endl;
}


Compiler output:
a.cc:22:29: error: macro "rep" requires 2 arguments, but only 1 given
   22 |   rep(int i = n-1;i > -1;i--) {
      |                             ^
a.cc:2:9: note: macro "rep" defined here
    2 | #define rep(i,n) for (int i = 0; (i) < (n); ++ (i))
      |         ^~~
a.cc:24:30: error: macro "rep" requires 2 arguments, but only 1 given
   24 |     rep(int j = 2;j*i < n;j++) {
      |                              ^
a.cc:2:9: note: macro "rep" defined here
    2 | #define rep(i,n) for (int i = 0; (i) < (n); ++ (i))
      |         ^~~
a.cc: In function 'int main()':
a.cc:22:3: error: 'rep' was not declared in this scope
   22 |   rep(int i = n-1;i > -1;i--) {
      |   ^~~
Language: C++

#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
#include <sstream>
#include <utility>
#define ll long long int
#define rep(i,x,y) for(int i=x;i<y;i++)
#define rel(i,x,y) for(int i=x-1;i>=y;i--)
#define all(x) x.begin(),x.end()

using namespace std;

int main(){
	int n;
	cin >> n;
	int a[n+1];
	int b[n+1];///output
	ll pnt=0;
	rep(i,1,n+1) cin >> a[i];
	rel(i,n+1,1){
		if(i*2>n){
			b[i] = a[i];
		}else{
			ll tmp = i;
			int ans=0;
			ll tmp1 = tmp*2;
			while(tmp1<=n){
				ans += b[tmp1];
				/*
				if(((ans+b[tmp1])%2)){
					ans = 1;
				}else{
					ans = 0;
				}
				tmp1 += tmp;
				*/
			}
			if(ans%2){
				ans = 0;
			}else{
				ans = 1;
			if(ans!=a[i]){
				b[i] = 1;
				pnt++;
			}else{
				b[i] = 0;
			}
		}
	}
	cout << pnt << endl;
	rep(i,1,n+1){
		if(b[i]) cout << i << endl;
	}

}


Compiler output:
a.cc: In function 'int main()':
a.cc:57:2: error: expected '}' at end of input
   57 | }
      |  ^
a.cc:15:11: note: to match this '{'
   15 | int main(){
      |           ^
Language: C++

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <numeric>
#include <queue>
#include <vector>
#include <cmath>
#include <cctype>
#include <cstring>
#include <cstdio>
#include <set>
#include <map>

using namespace std;

typedef long long LL;
typedef pair<int, int> PII;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define repl(i, n) for(LL i = 0; i < (LL)(n); i++)

int main(void){
  LL n;
  cin >> n;
  vector<int> a(n);
  repl(i, n) cin >> a[i];
  LL m = 0;
  vector<int> b(n);
  vector<int> b_ind(n);

  for (LL i = n-1; 0 <= i; i--) {
    if (n / 2 < i+1) {
      if (a[i] == 1) {
        b_ind[m] = i+1;
        m ++;
      }
      b[i] = a[i];
    } else {
      int sum = 0;
      for (LL i = 2; i <= n / (idx + 1); i ++) {
        sum += b[(idx + 1) * i - 1];
      }
      if ((sum % 2) == a[i]) b[i] = 0;
      else {
        b_ind[m] = i+1;
        m ++;
        b[i] = 1;
      }
    }
  }

  cout << m << endl;
  for (int i = m-1; 0 <= i; i--) cout << b_ind[i] << ' ';

  cout << endl;


  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:32: error: 'idx' was not declared in this scope
   41 |       for (LL i = 2; i <= n / (idx + 1); i ++) {
      |                                ^~~
Language: C++

#include <math.h>
using namespace std;
int main(void){
    int n;
    cin>>n;
    int a[n+1],b[n+1],c[n+1];
    for(int i=1;i<=n;i++) b[i]=0;
    for(int i=1;i<=n;i++) cin>>a[i];
    for(int i=1;i<=n;i++){
        if(a[i]==b[i]%2) continue;
        if(a[i]!=b[i]%2){
            for(int j=1;j<=n;j++){
                if(i%j==0) b[j]++;
                }
            }
        }
        
    int z=0;
    for(int i=1;i<=n;i++){
        b[i]%=2;
        if(b[i]%2==1) z++;
    }
    cout<<z<<endl;
    for(int i=1;i<=n;i++){
        if(b[i]%2==1) cout<<i<<" ";
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin>>n;
      |     ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <math.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:23:5: error: 'cout' was not declared in this scope
   23 |     cout<<z<<endl;
      |     ^~~~
a.cc:23:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:23:14: error: 'endl' was not declared in this scope
   23 |     cout<<z<<endl;
      |              ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include <math.h>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C++


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

	int* a = new int[N];
	bool* ball = new bool[N];
	for (int i = 0; i < N; i++) {
		cin >> a[i];
		ball[i] = false;
	}

	int count = 0;
	for (int i = N; i >= 1; i--) {
		int localSum = 0;
		for (int j = 2; ; j++) {
			int n = i * j;
			if (n > N)
				break;
			if (ball[n - 1])
				localSum++;
		}

		if (a[i - 1] == 1) {
			if (localSum % 2 == 0) {
				ball[i-1] = true;
				count++;
				localSum++;
			}
		}
	}

	cout << count << endl;
	for (int i = 0; i < N; i++) {
		if (ball[i])
			cout << i+1 << " ";
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin >> N;
      |         ^~~
a.cc:34:9: error: 'cout' was not declared in this scope; did you mean 'count'?
   34 |         cout << count << endl;
      |         ^~~~
      |         count
a.cc:34:26: error: 'endl' was not declared in this scope
   34 |         cout << count << endl;
      |                          ^~~~
Language: C

#include <stdio.h>

int main(){
	int n;
	scanf("%d",&n);
	int a[n];
	int b[n];
	for(int i=0; i<n; i++){
		scanf("%d",&a[i]);
		b[i]=0;
	}
	
	for(int i=n; i>=1; i--){
		int sum=0;
		/*if((sum%2)==a[i-1]){
			printf("%d\n",sum);
			for(int j=1; j<=n; j++){
				int flg=0;
				if(a[j-1]==1){
					if(flg==0){	
						printf("%d",j);
						flg ++;
					}else{
						printf(" %d",j);
					}
				}
			}
		}*/
		for(int j=1; j<=(n/i); j++){
			sum+=b[j*i-1];
		}
		b[i-1]=(sum+a[i-1])%2;
	}
	
	int sum_b=0;
	for(int i=0; i<n; i++){
		sum_b+=b[i];
	}
	
	printf("%d\n",sum_b);
	
	for(int j=1; j<=n; j++){
		int flg=0;
		if(b[j-1]==1){
			if(flg==0){	
				printf("%d\n",j);

		}
	}
}

Compiler output:
main.c: In function 'main':
main.c:50:1: error: expected declaration or statement at end of input
   50 | }
      | ^
Language: Java

import java.util.*;

class Main{
  static int mod=1000000007;
  public static void main(String[] args){
    Scanner s = new Scanner(System.in);

    int n = s.nextInt();
    int[] q = new int[n];
    Arrays.setAll(q, i -> s.nextInt());

    boolean[] a = new boolean[n+1];
    int c = 0;

    for(int i = n; i > 0; i--) {
      boolean t = q[i-1] == 1;
      for(int j = i*2; j <= n; j += i)
        t ^= a[j];
      a[i] = t;
      if(a[i])
        c++;
    }
    System.out.println(c);
    StringBuilder builder = new StringBuilder();
    for(int i = 0;i <= n;++i)
      if(a[i])
        sb.append(i).append("\n");
    System.out.println(builder);
  }
}

Compiler output:
Main.java:27: error: cannot find symbol
        sb.append(i).append("\n");
        ^
  symbol:   variable sb
  location: class Main
1 error
Language: Java

import java.util.Scanner;
public class Main2 {
@SuppressWarnings("resource")
public static void main(String[] args) {
	Scanner sc=new Scanner(System.in);
	int N=sc.nextInt();
	int a=0;
	int sa=0;
	for(int i=0;i<N;i++) {
		a=sc.nextInt();
		sa=i;
	}
	if(a==0) {
		System.out.println(0);
	}else {
		System.out.println(1);
		System.out.println(sa+1);
	}
}
}

Compiler output:
Main.java:2: error: class Main2 is public, should be declared in a file named Main2.java
public class Main2 {
       ^
1 error
Language: C++

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

int main()
{
  int N;
  cin >> N;
  vector<int> a(N);
  for (int i = 0; i < N; i++)
  {
    cin >> a.at(i);
  }
  bool good = true;
  int ans = 0;
  for (int bit = 1; bit < (1 << N + 1); bit++)
  {
    int M = 0;
    for (int i = 0; i < N; i++)
    {
      int cnt_i = 0;
      int j = 1;
      while (j <= N)
      {
        if (bit & (1 << j))
        {
          cnt_i++;
        }
        j *= i + 1;
      }
      if (cnt_i % 2 != a.at(i))
      {
        good = false;
        break;
      }
      else
        M++;
    }
    if (!good)
      break;
    ans = M;
    vector<int> b;
    for (int k = 0; k < N; k++)
    {
      if (bit & (1 << k + 1))
      {
        b.push_back(k + 1);
      }
    }
  }

  if (!good)
    cout << -1 << endl;
  else
  {
    cout << M << endl;
    for (int i = 0; i < N; i++)
    {
      cout << b.at(i) << " ";
    }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:55:13: error: 'M' was not declared in this scope
   55 |     cout << M << endl;
      |             ^
a.cc:58:15: error: 'b' was not declared in this scope
   58 |       cout << b.at(i) << " ";
      |               ^
Language: C++

#include <bits/stdc++.h>
#define ll long long
#define double long double
#define rep(i,n) for(int i=0;i<(n);i++)
#define REP(i,n) for(int i=1;i<=(n);i++)
#define mod (ll)(1e9+7)
#define inf (ll)(3e18+7)
#define P pair<int,int>
#define PiP pair<int,pair<int,int>>
#define all(x) x.begin(),x.end()
using namespace std;

int main() {
  int n, m=0;
  cin >> n;
  vector<int> a(n), ans(n, 0);
  rep(i, n) cin >> a.at(i);
  for(int i = n; i > 0; i--) {
      int sum = 0;
      for(int j = 2 * i; j <= n; j += i) sum += a.at(j-1);
      if((sum % 2) != a.at(i-1)){ ans.at(i-1) = 1;
      }else{ ans.at(i-1) = 0;}
    }
    if(ans.at(i-1) == 1) m++;
  }
  cout << m << endl;
  for(int i = 0; i < n; i++){
    if(ans.at(i) == 1) cout << i+1 << " ";
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:15: error: 'i' was not declared in this scope
   24 |     if(ans.at(i-1) == 1) m++;
      |               ^
a.cc: At global scope:
a.cc:26:3: error: 'cout' does not name a type
   26 |   cout << m << endl;
      |   ^~~~
a.cc:27:3: error: expected unqualified-id before 'for'
   27 |   for(int i = 0; i < n; i++){
      |   ^~~
a.cc:27:18: error: 'i' does not name a type
   27 |   for(int i = 0; i < n; i++){
      |                  ^
a.cc:27:25: error: 'i' does not name a type
   27 |   for(int i = 0; i < n; i++){
      |                         ^
a.cc:30:1: error: expected declaration before '}' token
   30 | }
      | ^
Language: C++

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


int main() {
    int N;
    cin >> N;
    vector<int> v;
    int cnt = 0;
    for (int i = 0; i < N; i++) {
        int A;
        cin >> A;
        auto low = lower_bound(v.begin(), v.end(), A);
        if (low == v.begin()) {
            v.push_front();
            cnt ++;
        } else {
            low --;
            *low = A;
        }
    }
    cout << cnt << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:15: error: 'class std::vector<int>' has no member named 'push_front'
   15 |             v.push_front();
      |               ^~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >>N;
  vector<int> a(N);
  vector<int> b(N);
  for(int t = N;t>0;t--){
    int balls;
    if(N/t==1){
      b.at(t-1)=a.at(t-1);
    }else{
      for(int i = 2;i<=N/t;i++){
      	balls +=b.at(t*i-1);
      }
        b.at(t-1)=a.at(t)-balls/2
    }
  }
  
  

  
  
queue<int> c;
  for(int t = 0; t<N;t++){
    if(b.at(t)!=0){
      c.push(t+1);
    }
  }
  cout <<c.size()<<endl;
  for(int t=0;t<c.size();t++){
    cout <<c.front()<<" ";
    c.pop();
  }   
}
       

Compiler output:
a.cc: In function 'int main()':
a.cc:17:34: error: expected ';' before '}' token
   17 |         b.at(t-1)=a.at(t)-balls/2
      |                                  ^
      |                                  ;
   18 |     }
      |     ~
Language: C++

#include <stdio.h>
//#include <utility>
#include <algorithm>
#include <vector>
//#include <vector>
//#include<string>

using namespace std;

int main() {

	int n, amounttmp = 0;
	bool ispossible = true;
	vector<int> a(200000);
	vector<int> boxes(200000);
	scanf("%d", &n);

	for (int i = 0; i < n; ++i) scanf("%d", &a[i]);
	
	for (int i = n - 1; i > n / 2 + 1; --i) {
		if (a[i])++boxes[i];
	}

	for (int i = n / 2 + 1; i > -1; --i) {
		if (a[i]) {//奇数である必要がある
			for (int j = i; j < n; j += i)if (boxes[j])++amounttmp;
			if (!(amounttmp % 2))++boxes[i];
		}
		else {//偶数
			for (int j = i; j < n; j += i)if (boxes[j])++amounttmp;
			if (amounttmp % 2)++boxes[i];
		}
		amounttmp = 0;
	}

	for (int i = 0; i < n; ++i) {
		if (a[i]) {
			/*奇数なら*/
			for (int j = 0; j < n; ++j) {
				if (boxes[j])++amounttmp;
			}
			if(!(amounttmp % 2))ispossible = false
		}
		else {
			for (int j = 0; j < n; ++j) {
				if (boxes[j])++amounttmp;
			}
			if (amounttmp % 2)ispossible = false;
		}
		if (ispossible == false)break;
	}


	//後ろからやっていくと1/2まで個数が決まる
	//高い順に条件に合わせていく
	//

	if (ispossible) for (int i = 0; i < n; ++i) {
		printf("%d ", boxes[i]);
	}
	else printf("-1");
	printf("\n");

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:63: error: expected ';' before '}' token
   42 |                         if(!(amounttmp % 2))ispossible = false
      |                                                               ^
      |                                                               ;
   43 |                 }
      |                 ~
Language: Java

import java.util.Scanner;
public class Main2 {
public static void main(String[] args) {
	Scanner sc=new Scanner(System.in);
	int N=sc.nextInt();
	int a=0;
	for(int i=0;i<N;i++) {
		a=sc.nextInt();
	}
	if(a==0) {
		System.out.println(0);
	}else {
		System.out.println(1);
		System.out.println(1);
	}
}
}

Compiler output:
Main.java:2: error: class Main2 is public, should be declared in a file named Main2.java
public class Main2 {
       ^
1 error
Language: C++

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

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n;
	cin >> n;
	valarray<int> a(n);
	for (int i = 0; i < n; ++i) {
		cin >> a[i];
	}
	bool is_ne = false;
	for (int i = 0; i < n; ++i) {
		int ii = n - i;
		int idx = ii - 1;
		if (a[idx] == 1) {
			if ((n - idx) / ii == 0) { // last only
				if (a[idx] % 2 == 0 && a[idx] == 0) {
					// ok
				}
				else if (a[idx] % 2 == 1 && a[idx] == 1) {
					// ok
				}
				else {
					is_ne = true;
					break;
				}
			}
			if (valarray<int>(a[slice(idx, (n - idx) / ii, ii)]).sum() % 2 != idx % 2) {
				is_ne = true;
				break;
			}
		}
		else {
			if (valarray<int>(a[slice(idx, (n - idx) / ii, ii)]).sum() % 2 != idx % 2) {
				a[idx] = 1;
			}
		}
	}
	if (is_ne) {
		cout << -1 << "\n";

	}
	else {
		cout << a.sum() << "\n";
		for (int i = 0; i < n; ++i) {
			if (a[i] == 1) {
				cout << i + 1 << " ";
			}
		}
		cout << "\n";
	}
}
}


Compiler output:
a.cc:58:1: error: expected declaration before '}' token
   58 | }
      | ^
Language: C++

#include <iostream>
#include <iomanip>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <vector>
#include <algorithm>

using namespace std;


typedef long long int lli;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii; 


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin>>n;
    vi ab(n+1);
    int su = 0;
    for (int i = 1; i <= n; i++)
    {
        cin>>ab[i];
        su+=ab[i];
    }
    vi ac(n+1);
    for (int i = n; i >= 1; i--)
    {
        ac[i] = 0;
        for(int j=i;j<=n;j+=i){ac[i] += ab[j];}
        if((ac[i]%2)!=ab[i]){
            ac[i] += 1;
            su += 1;
        }
        ac[i] %= 2;
        // ac[i]=ac[i]%2;
        // if(ac[i]!=ab[i]){
        //     cout<<"-1\n";
        //     return 0;
        // }
    }
    if(ab[1]!=su%2){
        ac[1]+=1;
    }
    // vi ad;
    for (int i = 1; i <= n; i++)
    {
        if(ac[i]==1){
            ad.push_back(i);
        }
    }
    cout<<ad.size()<<endl;;
    for (int i = 0; i < ad.size(); i++)
    {
        cout<<ad[i]<<" ";
    }if(ad.size()!=0){cout<<endl;}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:59:13: error: 'ad' was not declared in this scope; did you mean 'ac'?
   59 |             ad.push_back(i);
      |             ^~
      |             ac
a.cc:62:11: error: 'ad' was not declared in this scope; did you mean 'ac'?
   62 |     cout<<ad.size()<<endl;;
      |           ^~
      |           ac
Language: C++

#include<bits/stdc++.h>
#include<cstdio>

using namespace std;

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

    vector<int> a;
    int i,j;

    int m=0;

    for(i=0;i<n;i++){
        int Na;
        cin >> Na;
        a.emplace_back(Na);
    }

    for(i=0;i<n;i++){
        if(a[i]==1){
            b.emplace_back(0);
            b.end()++;
        }
    }

    for(aout v : b){
        cout << v << endl;
    }   
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:13: error: 'b' was not declared in this scope
   24 |             b.emplace_back(0);
      |             ^
a.cc:29:9: error: 'aout' was not declared in this scope
   29 |     for(aout v : b){
      |         ^~~~
a.cc:32:1: error: expected primary-expression before '}' token
   32 | }
      | ^
a.cc:31:6: error: expected ';' before '}' token
   31 |     }
      |      ^
      |      ;
   32 | }
      | ~     
a.cc:32:1: error: expected primary-expression before '}' token
   32 | }
      | ^
a.cc:31:6: error: expected ')' before '}' token
   31 |     }
      |      ^
      |      )
   32 | }
      | ~     
a.cc:29:8: note: to match this '('
   29 |     for(aout v : b){
      |        ^
a.cc:32:1: error: expected primary-expression before '}' token
   32 | }
      | ^