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);
    }
    sort(A.begin(), A.end());
    
    int y = N % 2;
    bool can = true;
    if (y == 0){
        for (int i = 0; i < N; i += 2){
            if (A.at(i) != i + 1){
                can = false;
                break;
            }
            if (A.at(i + 1) != i + 1){
                can = false;
                break;
            }
        }
    }
    else{
        if (A.at(0) != 0) can = false;
        for (int i = 1; i < N; i += 2){
            if (A.at(i) != i + 1){
                can = false;
                break;
            }
            if (A.at(i + 1) != i + 1){
                can = false;
                break;
            }
        }
    }
    double x = pow(2, N/2) % (pow(10, 9) + 7)
    if (can) cout << x << endl;
    else cout << 0 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:28: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   40 |     double x = pow(2, N/2) % (pow(10, 9) + 7)
      |                ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~
      |                   |                      |
      |                   |                      __gnu_cxx::__promote<double>::__type {aka double}
      |                   __gnu_cxx::__promote<double>::__type {aka double}
a.cc:42:5: error: 'else' without a previous 'if'
   42 |     else cout << 0 << endl;
      |     ^~~~
Language: C++

#include <iostream>
#define MOD 1000000000+7
using namespace std;

int main(void){
    int n;
    cin>>n;
    int a_count[n] = {};
    for(int i=0;i<n;i++){
        int a;
        cin>>a;
        a_count[a] ++;
    }
    long long ans=1;
    for(int i= (n%2)+1;i<n;i+=2){
        if(a_count[i] == 2){
            ans *= 2
            ans %= MOD;
        }else{
            ans = 0;
            break;
        }
    }
    if(n%2 == 1 && a_count[0] !=1) ans =0;
    
    cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:21: error: expected ';' before 'ans'
   17 |             ans *= 2
      |                     ^
      |                     ;
   18 |             ans %= MOD;
      |             ~~~
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<iomanip>
#include<algorithm>
#include<queue>
#include<stack>
#include<list>
#include<map>
#include<deque>
#include<math.h>
using namespace std;
#define ll long long
#define MOD 1000000007
vector <ll> g[10];
ll visited[10];
int main(){
    ll n;
    ll i;
    ll a[(n+1)/2];
    for(i=0;i<(n+1)/2;i++){
        a[i]=0;
    }
    ll A;
    for(i=0;i<n;i++){
        cin >> A;
        a[A/2]+=1;
        if((A+N)%2==1||a[A/2]>2){cout << 0;return 0;}
        if(N%2>0&&a[0]>1){cout << 0;return 0;}
    }
   
    cout << pow(2,n/2);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:15: error: 'N' was not declared in this scope
   28 |         if((A+N)%2==1||a[A/2]>2){cout << 0;return 0;}
      |               ^
a.cc:29:12: error: 'N' was not declared in this scope
   29 |         if(N%2>0&&a[0]>1){cout << 0;return 0;}
      |            ^
Language: Java

import java.util.*;

public class Main {
  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[sc.nextInt()]++;
    }
    long ans = 0;
    int pp = 0;
    long MOD = (long)Math.pow(10, 9) + 7;
    if((n % 2) == 0) {
      int p = 0;
      for(int i = 1; i <= (n - 3); i++) {
        if(a[i] != 2) p++;
      }
      if(p == 0) pp = 1;
    } else {
      int p = 0;
      if(a[0] != 1) p++;
      for(int i = 2; i <= (n - 3); i++) {
        if(a[i] != 2) p++;
      }
      if(p == 0) pp = 1;
    }
    if(pp = 1) {
      ans = 1;
      for(int i = 0; i < (n / 2); i++) {
        ans = (ans * 2) % MOD;
      }
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:28: error: incompatible types: int cannot be converted to boolean
    if(pp = 1) {
          ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define all(a) a.begin(), a.end()
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<ll,ll> P;
typedef pair<ll,int> pli;
typedef pair<int,int> pii;
#define rep(i,a,b) for(ll i=a ; i<b ; i++)
#define qrep(que, ite) for(auto ite=begin(que) ; ite!=end(que) ; ite++)
const int max_n = 1e5;
const ll mod = 1e9+7;
const ll INF = 1LL<<60;
const int inf = 1e5;
//typedef long double ld;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
int dx[4] = {0,0,1,-1};
int dy[4] = {1,-1,0,0};
ll mo = 998244353;
struct UnionFind {
    vector<int> par;

    UnionFind(int n) : par(n, -1) { }
    void init(int n) { par.assign(n, -1); }

    int root(int x) {
        if (par[x] < 0) return x;
        else return par[x] = root(par[x]);
    }

    bool issame(int x, int y) {
        return root(x) == root(y);
    }

    bool merge(int x, int y) {
        x = root(x); y = root(y);
        if (x == y) return false;
        if (par[x] > par[y]) swap(x, y); // merge technique
        par[x] += par[y];
        par[y] = x;
        return true;
    }

    int size(int x) {
        return -par[root(x)];
    }
};
int main(){
  int n;  cin >> n;
  vector<ll> v(n);
  map<ll,ll> ma;
  rep(i,0,n){
    cin >> v[i];
    ma[v[i]]++;
  }
  ll ans=1;
  bool ok=true;
  if(n%2==1){
      for(auto j : ma){
        if(j.fi==0){
          if(j.se!=1){
            ok=false;
          }
        }else{
          if(j.se!=2)ok=false;
          else{
            ans *= 2;
            ans %= mod;
          }
        }
      }
      if()
  }else{
    for(auto j : ma){
      if(j.se!=2) ok=false;
      else{
        ans *= 2;
        ans %= mod;
      }
    }
  }
  if(ok)cout << ans << endl;
  else{
    cout << 0 << endl;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:76:10: error: expected primary-expression before ')' token
   76 |       if()
      |          ^
a.cc:77:3: error: expected primary-expression before '}' token
   77 |   }else{
      |   ^
Language: C++

/*I wanna be the very best, like no one ever was...*/

#include<bits/stdc++.h>
using namespace std;
/*******  All Required define Pre-Processors and Constants    *******/

#define ll long long
#define ull unsigned long long 
#define ld long double
#define mem(a, b) memset(a, (b), sizeof(a))
#define rep(i, j, k) for (int i = j ; i < k ; ++i)
#define rrep(i, j, k) for (int i = j; i > k; --i)
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define foreach(i, a) for(auto i: a)
#define forEach(it, l) for (auto it = l.begin(); it != l.end(); it++)
#define in(A, B, C) assert( B <= A && A <= C)
#define debug(a) cout << #a << ": " << a << endl
#define Flag(n) cout << "here " << n << endl
#define mp make_pair
#define pb push_back

#define endl '\n';
#define io ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
const ll POSITIVE_INFINITY = 9223372036854775807;
const ll NEGATIVE_INFINITY = -9223372036854775807;
const ll MOD = 1000000007;
const ld PI = acos(-1.0);
 

#define TRACE
#ifdef TRACE
#define see(...) __f(#__VA_ARGS__,__VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    cerr<<name<<" : "<<arg1<<endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma=strchr(names+1,',');cerr.write(names,comma-names)<<" : "<<arg1<<" | ";__f(comma+1, args...);
}
#else
#endif


int pow(int a , int n ){
    ll res =1;
    while(n){
        if(n%2==1){
            res= (res*a)%MOD;
        }
        a=(a*a)%MOD;
        n/=2;
    }
    return res;
}



int main() {
    io;
    // freopen("in","r",stdin); 
    // freopen("out","w",stdout);
    ll n;
    cin>>n;
    if (n == 1) {
		int p; cin >> p;
		if (p == 0) cout<<1;
		else cout<<0;
		return 0;
	}
    vector<ll> v(n);
    rep(i,0,n)cin>>v[i];
    ll flag = 1;
    sort(all(v));
   for(long i=n-1; i>1; i-=2){
        if(i!=0){
            if(v[i]!=i || v[i-1]!=i){
                flag=false;
            }
        }else{
            if(v[0]!=0){
                flag=false;
            }
        }
    }
     if(!flag){
        std::cout << 0 << std::endl;
    }else{
        cout<<pow(2,n/2)<<endl;
    }

 
 
 
    
 
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:14: error: expected unqualified-id before '\xa'
   23 | #define endl '\n';
      |              ^~~~
a.cc:88:32: note: in expansion of macro 'endl'
   88 |         std::cout << 0 << std::endl;
      |                                ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
  int no_of_people;
  cin >> no_of_people ;
  int difference[no_of_people];
  
  sort(difference,difference+no_of_people);
  
  if(difference[1]==0)
  {
    cout << 0;
  }
  else
  {
    cout << 2**(no_of_people/2);
  }
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:17:15: error: invalid type argument of unary '*' (have 'int')
   17 |     cout << 2**(no_of_people/2);
      |               ^~~~~~~~~~~~~~~~~
Language: C++

/*2020/03/15 ABC 050*/

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using p = pair<int, int>;  


int main() {
    int n;
    cin >> n;
    vector<int> vec(n);
    for(int i=0; i<n; i++) cin >> vec[i];
    sort(vec.begin(), vec.end());
    int j=-1, k=0;
    if(n%2==0) {
        for(int i=0; i<n; i++) {
            if(i%2==0) j+=2;
            if(vec[i]!=j) {
                cout << 0 << endl;
                return 0;
            }
        }
    } else {
        for(int i=0; i<n; i++) {
            if(i%2!=0) k+=2;
            if(vec[i]!=k) {
                cout << 0 << endl;
                return 0;
            }
        } 
    }
    cout << pow(2, n/2) % 1000000007<< endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:33:25: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   33 |     cout << pow(2, n/2) % 1000000007<< endl;
      |             ~~~~~~~~~~~ ^ ~~~~~~~~~~
      |                |          |
      |                |          int
      |                __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
#define rep2(i, a, n) for(ll i = a; i < (ll)(n); i++)
#define memi cout << endl
#define kono(n) cout << fixed << setprecision(n)
#define all(c) (c).begin(), (c).end()
#define pb push_back
#define hina cout << ' '
#define in(n) cin >> n
#define in2(n, m) cin >> n >> m
#define in3(n, m, l) cin >> n >> m >> l
#define out(n) cout << n
const ll mei = (ll)1e9 + 7;

int main(){
  ll n, s, a;
  in(n);
  vector<ll> a(n), b(n);
  rep(i, n){
    in(a[i]);
    b[a[i]]++;
  }
  s = 0;
  if(n % 2 == 0){
    rep(i, n){
      if(i == 0){
        if(b[i] != 1)
          s++;
      }
      else if(i % 2 == 0){
        if(b[i] != 2)
          s++;
      }
      else{
        if(b[i] != 0)
          s++;
      }
    }
  }
  else{
    rep(i, n){
      if(i % 2 == 1){
        if(b[i] != 2)
          s++;
      }
      else{
        if(b[i] != 0)
          s++;
      }
    }
  }
  if(s != 0){
    out(0);
    memi;
    return 0;
  }
  s = 0;
  rep(i, n){
    if(b[i] == 2)
      s++;
  }
  a = 1;
  rep(i, s)
    a *= 2;
  out(a);
  memi;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:14: error: conflicting declaration 'std::vector<long long int> a'
   20 |   vector<ll> a(n), b(n);
      |              ^
a.cc:18:12: note: previous declaration as 'll a'
   18 |   ll n, s, a;
      |            ^
a.cc:22:9: error: invalid types 'll {aka long long int}[ll {aka long long int}]' for array subscript
   22 |     in(a[i]);
      |         ^
a.cc:11:22: note: in definition of macro 'in'
   11 | #define in(n) cin >> n
      |                      ^
a.cc:23:8: error: invalid types 'll {aka long long int}[ll {aka long long int}]' for array subscript
   23 |     b[a[i]]++;
      |        ^
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>

int main() {
    int N, ans, i;
    std::vector<int> vec;
    std::string str;

    std::cin >> N;
    for (i = 0; i < N; i++) {
        std::cin >> str;
        vec.push_back(std::stoi(str));
    }

    std::sort(vec.begin(), vec.end());

    if (N % 2 == 0) {
        for (i = 0; i < N; i += 2) {
            if ((vec.at(i) != i + 1) || (vec.at(i + 1) != i + 1)) {
                std::cout << 0;
                return 0;
            }
        }
    } else {
        if (vec.at(0) != 0) {
            std::cout << 0;
            return 0;
        }

        for (i = 1; i < N; i += 2) {
            if ((vec.at(i) != i + 1) || (vec.at(i + 1) != i + 1)) {
                std::cout << 0;
                return 0;
            }
        }
    }

    ans = std::pow(2, std::floor(N / 2)) % (std::pow(10, 9) + 7);
    std::cout << ans;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:42: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   41 |     ans = std::pow(2, std::floor(N / 2)) % (std::pow(10, 9) + 7);
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~
      |                   |                                         |
      |                   |                                         __gnu_cxx::__promote<double>::__type {aka double}
      |                   __gnu_cxx::__promote<double>::__type {aka double}
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] times = new int[n];
    
        boolean isOdd = (n & 1) == 1;
        int num = 0;
        for(int i = 0; i < n; i++) {
            num = sc.nextInt();

            if(isOdd && ((num & 1) == 1)) {
                System.out.println(0);
                return;
            } else if(!isOdd && ((num & 1) == 0)) {
                System.out.println(0);
                return;
            }
            
            times[num]++;
            if(times[num] > 2 || times[0] == 2) {
                System.out.println(0);
                return;
            }
        }
    
        long ans = 1;
		for(int i = 0; i < n/2; i++)
		    ans = 2 * ans % 1000000007;
		System.out.println(modPow(2L, n / 2));
    }
    
    static long modPow(long x, long n) {
        long res = 1L;
        while (n > 0) {
            if ((n & 1) == 1) {
                res = res * x % MOD;
            }
            x = x * x % MOD;
            n >>= 1;
        }
        return res;
    }
}


Compiler output:
Main.java:39: error: cannot find symbol
                res = res * x % MOD;
                                ^
  symbol:   variable MOD
  location: class Main
Main.java:41: error: cannot find symbol
            x = x * x % MOD;
                        ^
  symbol:   variable MOD
  location: class Main
2 errors
Language: C++

#include <cstdio>
#include <iostream>

using namespace std ;

const int P = 1000000007 ;

int n ;
int yes[500000] ;
int base[500000] ;

int expow(int a, int b){
    int res = 1 ;
    while (b){
        if (b & 1)
            res = 1ll * a * res % P ;
        a = 1ll * a * a % P ; b >>= 1 ;
    }
    return res ;
}
int main(){
    cin >> n ;
    for (int i = 1 ; i <= n ; ++ i) scanf("%d", &base[i]) ;
    sort(base + 1, base + n + 1) ;
    if (n & 1){
        yes[1] = 0 ; int cnt = 0 ;
        for (int i = 2 ; i <= n ; i += 2)
            yes[i] = yes[i + 1] = 2 * (++ cnt) ;
        for (int i = 1 ; i <= n ; ++ i)
            if (base[i] != yes[i]) return puts(""), 0 ;
    }
    else{
        int cnt = 0 ;
        yes[1] = yes[2] = ++ cnt ;
        for (int i = 3 ; i <= n ; i += 2)
            yes[i] = yes[i + 1] = (cnt += 2) ;
        for (int i = 1 ; i <= n ; ++ i)
            if (base[i] != yes[i]) return puts(""), 0 ;
    }
    return printf("%d\n", expow(2, n / 2)), 0 ;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   24 |     sort(base + 1, base + n + 1) ;
      |     ^~~~
      |     short
Language: Java

import com.sun.javafx.logging.JFRInputEvent;

import java.io.*;
import java.util.*;

class Main {
	static final int M = 1000000007;

	public static void main(String[] args) throws Exception {
		final Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] A = new int[N];
		for (int i = 0; i < N; i++) {
			int p = sc.nextInt();
			A[p]++;
			if (A[p] > 2) {
				System.out.println(0);
				return;
			}
		}
		if (N % 2 == 1) {
			if (A[0] != 1) {
				System.out.println(0);
				return;
			}
		} else if (A[0] != 0) {
			System.out.println(0);
			return;
		}

		for (int i = 1; i < A.length; i++) {
			if (A[i] == 1) {
				System.out.println(0);
				return;
			}
		}

		int a = 1;
		for (int i = 0; i < N / 2; i++) {
			a = a * 2 % M;
		}
		System.out.println(a);
	}
}


Compiler output:
Main.java:1: error: package com.sun.javafx.logging does not exist
import com.sun.javafx.logging.JFRInputEvent;
                             ^
1 error
Language: C++

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

int main(int argc, const char * argv[]) 
    
    // cinを高速にするためのおまじない
    cin.tie(0);
    ios::sync_with_stdio(false);

    long cnt = 0;
    cin >> cnt;

    int store[100000] = {0};
    int error = false;

    for (int i=0; i<cnt; i++) {
        int num;
        cin >> num;

        store[num] = store[num] + 1;
        if (store[0] > 1) {
            error = true;
            break;
        } else if (store[num] > 2) {
            error = true;
            break;
        }
    }

    if (error) {
        cout << 0;
        return 0;
    }

    long n = (cnt/2);
    long a = pow(2, n);
    long b = pow(10, 9) + 7;
    long result = a % b;
    cout << result;

    return 0;
}


Compiler output:
a.cc:11:5: error: expected initializer before 'cin'
   11 |     cin.tie(0);
      |     ^~~
a.cc:12:5: error: specializing member 'std::basic_ios<char>::sync_with_stdio' requires 'template<>' syntax
   12 |     ios::sync_with_stdio(false);
      |     ^~~
a.cc:15:5: error: 'cin' does not name a type
   15 |     cin >> cnt;
      |     ^~~
a.cc:20:5: error: expected unqualified-id before 'for'
   20 |     for (int i=0; i<cnt; i++) {
      |     ^~~
a.cc:20:19: error: 'i' does not name a type
   20 |     for (int i=0; i<cnt; i++) {
      |                   ^
a.cc:20:26: error: 'i' does not name a type
   20 |     for (int i=0; i<cnt; i++) {
      |                          ^
a.cc:34:5: error: expected unqualified-id before 'if'
   34 |     if (error) {
      |     ^~
a.cc:43:5: error: 'cout' does not name a type
   43 |     cout << result;
      |     ^~~~
a.cc:45:5: error: expected unqualified-id before 'return'
   45 |     return 0;
      |     ^~~~~~
a.cc:46:1: error: expected declaration before '}' token
   46 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
#define rep(i,n) for(int i=0; i<(n); i++)
int a[100100];
int cnt[100100];
int main() {
  int n;
  cin >> n;
  rep(i,n) cin >> a[i];
  rep(i,n) cnt[i]=0;
  rep(i,n) cnt[a[i]]++;
  if(n%2==0){
    int limit = n-1;
    bool ok = true;
    int count = 0;
    while(limit>0){
      if(cnt[limit]!=2) ok = false;
      limit -=2;
      count++;
    }
    if(!ok){
      cout << 0 << endl;
      return 0;
    }
    else{
      ll ans = pow(2,count)%1000000007;
      cout << ans << endl;
      return 0;
    }
  }
  else{
    int limit=n-1;
    bool ok=true;
    int count=0;
    while(limit>=0){
      if(limit>0 && cnt[limit]!=2) ok=false;
      else if(limit==0 && cnt[limit]!=1) ok=false;
      limit-=2;
      count++;
    }
    if(!ok){
      cout << 0 << endl;
      return 0;
    }
    else{
      ll ans = pow(2,count-1)%1000000007;
      cout << ans << endl;
      return 0;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:28: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   28 |       ll ans = pow(2,count)%1000000007;
      |                ~~~~~~~~~~~~^~~~~~~~~~~
      |                   |         |
      |                   |         int
      |                   __gnu_cxx::__promote<double>::__type {aka double}
a.cc:48:30: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   48 |       ll ans = pow(2,count-1)%1000000007;
      |                ~~~~~~~~~~~~~~^~~~~~~~~~~
      |                   |           |
      |                   |           int
      |                   __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <iostream>
#include <cstdio>
#include <string>
#include <bits/stdc++.h>
#include <set>
#include <list> //list<???> a; a.push_back ,insert(追加したい要素),a.sort(),参照できない
#include <vector> //vector<???> a; a.push_back,sort(a.begin(),a.end());a[i]
//配列 int a[N];a[i]=追加したい要素;sort(a,a+N);a[i]
const int MOD = 1e9+7;
using namespace std;
typedef long  ll;
#define rep(i,n) for(int i=0;i<(n);i++)


//using namespace std;
//


int main(){
  long long N;cin>>N;
  long long ans[1000000];
  long long A,a=1,flag=0;
  for(long long i=0;i<N;i++){
    cin>>A;
    ans[A]++;
  }

  if(N%2==1 && ans[0]==1){
    for(long long i=2;i<N;i+=2){
      if(ans[i]==2){
        flag=1;
        (a=a*2) %= MOD;
      }else{
        flag=0;
        break;
      }
    }
  }else if(N%2==0 && ans[1]==2){
    for(long long i=1;i<N;i+=2){
      if(ans[i]==2){
        flag=1;
        (a=a*2) %= MOD;
      }else{
        flag=0;
        break;
      }
    }
  }else{
    flag=0;
    break;
  }
  
  if(flag==1){
    cout<<a<<endl;
  }else{
    cout<<0<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:5: error: break statement not within loop or switch
   50 |     break;
      |     ^~~~~
Language: C++

#include <iostream>
#include <cstdio>
#include <string>
#include <bits/stdc++.h>
#include <set>
#include <list> //list<???> a; a.push_back ,insert(追加したい要素),a.sort(),参照できない
#include <vector> //vector<???> a; a.push_back,sort(a.begin(),a.end());a[i]
//配列 int a[N];a[i]=追加したい要素;sort(a,a+N);a[i]
const int MOD = 1e9+7;
using namespace std;
typedef long  ll;
#define rep(i,n) for(int i=0;i<(n);i++)


//using namespace std;
//


int main(){
  int N;cin>>N;
  int a[N];
  for(int i=0;i<N;i++){
    int A;cin>>A;
    a[i]=A;
  }
  int flag=1;

  sort(a,a+N);



  for(int i=0;i<N-1;i++){

    if(N%2==1 && a[0]==0){
      if((i%2==0 && a[i]+2==a[i+1]) || (i%2==1 && a[i]==a[i+1]){
        flag=1;
      }else{
        flag=0;
        break;
      }

    }else if(N%2==0 && a[0]==1){
      if((i%2==1 && a[i]+2==a[i+1]) || (i%2==0 && a[i]==a[i+1])){
        flag=1;
      }else{
        flag=0;
        break;
      }
    }
  }

  if(flag==1){
    long long ans = pow(2,N/2);
    cout<<ans%MOD<<endl;
  }else{
    cout<<0<<endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:64: error: expected ')' before '{' token
   35 |       if((i%2==0 && a[i]+2==a[i+1]) || (i%2==1 && a[i]==a[i+1]){
      |         ~                                                      ^
      |                                                                )
a.cc:42:5: error: expected primary-expression before '}' token
   42 |     }else if(N%2==0 && a[0]==1){
      |     ^
Language: C++

#include <iostream>
#include <cstdio>
#include <string>
#include <bits/stdc++.h>
#include <set>
#include <list> //list<???> a; a.push_back ,insert(追加したい要素),a.sort(),参照できない
#include <vector> //vector<???> a; a.push_back,sort(a.begin(),a.end());a[i]
//配列 int a[N];a[i]=追加したい要素;sort(a,a+N);a[i]
using namespace std;
typedef long  ll;
#define rep(i,n) for(int i=0;i<(n);i++)


//using namespace std;
//


int main(){
  int N;cin>>N;
  int a[N];
  for(int i=0;i<N;i++){
    int A;cin>>A;
    a[i]=A;
  }
  int flag=1;

  sort(a,a+N);



  for(int i=0;i<N-1;i++){
    if(N%2==1 && a[0]==0){
      if((i%2==0 && a[i]+2==a[i+1]) || i%2==1){
        flag=1;
      }else{
        flag=0;
        break;
      }

    }else if(N%2==0 && a[0]==1){
      if((i%2==1 && a[i]+2==a[i+1]) || i%2==0){
        flag=1;
      }else{
        flag=0;
        break;
      }
    }else{
      flag=0;
      break;
    }
  }

  if(flag==1){
    cout<<(N/2)*(N/2)<<endl;
  }else{
    cout<<0<<endl;
  }


Compiler output:
a.cc: In function 'int main()':
a.cc:57:4: error: expected '}' at end of input
   57 |   }
      |    ^
a.cc:18:11: note: to match this '{'
   18 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF= 1LL << 60;
#define REP(i,n) for(ll i=0; i<n; i++)
#define FOR(i,a,n) for(ll i=a; i<n; i++)
#define tl 1'000'000'009
int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n;
    cin >> n;
    vector<ll>A(n);
    map<ll,ll>p;
    REP(i,n){
        cin >> A[i];
        p[A[i]]++;
        if(p[A[i]]>1) A[i]*= -1;
    }
    sort(A.begin(), A.end());
    // REP(i,n) cout << A[i] << endl;
    ll cc= -(n-1);
    int flag= 1;
    REP(i,n){
        if(A[i]!=cc) flag=0;
        cc+= 2;
    }
    cout << (powl(2,n/2)*flag)%tl << endl;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:31: error: invalid operands of types 'long double' and 'int' to binary 'operator%'
   28 |     cout << (powl(2,n/2)*flag)%tl << endl;
      |             ~~~~~~~~~~~~~~~~~~^
      |                         |
      |                         long double
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF= 1LL << 60;
#define REP(i,n) for(ll i=0; i<n; i++)
#define FOR(i,a,n) for(ll i=a; i<n; i++)
#define tl 1'000'000'009
int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int>A(n);
    map<int,int>p;
    REP(i,n){
        cin >> A[i];
        p[A[i]]++;
        if(p[A[i]]>1) A[i]*= -1;
    }
    sort(A.begin(), A.end());
    // REP(i,n) cout << A[i] << endl;
    ll cc= -(n-1);
    int flag= 1;
    REP(i,n){
        if(A[i]!=cc) flag=0;
        cc+= 2;
    }
    cout << ((flag)?powl(2,n/2):0)%tl << endl;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:35: error: invalid operands of types 'long double' and 'int' to binary 'operator%'
   28 |     cout << ((flag)?powl(2,n/2):0)%tl << endl;
      |             ~~~~~~~~~~~~~~~~~~~~~~^
      |                    |
      |                    long double
Language: C++

#include<bits/stdc++.h>
#include<numeric>
using namespace std;
#define ll  long long
#define mp make_pair
#define fi first
#define se second
#define pii pair<ll,ll>
#define pb push_back
#define io ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define what_is(x) cerr << #x << " is " << x << endl;
int main()
{
    ll int n,ans;
    int flag=1;
    cin >> n;
    // if(n==0)
    // cout << 0;
    std::vector<int>A(n);
    for(int i=0;i<n;i++)
    cin >> A[i];
    // if(n==0&&A[0])
    sort(A.begin(),A.end());
    if(n%2)
    {
        if(A[0]!=0)
        {flag=0;break;}
        for(int i=1;i<n;i+=2)
        {
            if(!(A[i]==A[i+1]&&A[i]==(i+1)))
            {flag=0;break;}
        }
        n /=2;
        ans = pow(2,n);
    }
    else 
    {
        for(int i=0;i<n;i+=2)
        {
            if(!(A[i]==A[i+1]&&A[i]==(i+1)))
            {flag = 0;break;}
        }
        n /=2;
        ans = pow(2,n);
    }
    if(flag)
    cout << ans;
    else
    cout << 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:17: error: break statement not within loop or switch
   27 |         {flag=0;break;}
      |                 ^~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <iomanip>
#include <cmath>
#include <climits>
using namespace std;

bool comp(pair<int, string> a, pair<int, string> b){
    if(a.first != b.first) return a.first > b.first;
    else return a.second < b.second;
}

int main(){
    vector<long int> v;

    long int n;
    cin >> n;
    for(long int i = 0; i < n; ++i){
        long int a;
        cin >> a;
        v.push_back(a);
    }

    sort(v.begin(),v.end());

    if(n % 2 == 1){
        if(v[0] != 0){
            cout << 0 << endl;
            return 0;
        }
        for(long int i = 1;i < n; i += 2){
            if(v[i] != v[i + 1]){
                cout << 0 << endl;
                return 0;
            }
        }
        cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
    }else{
        for(int i = 0;i < n; i += 2){
            if(v[i] != v[i + 1]){
                cout << 0 << endl;
                return 0;
            }
        }
        cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:27: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   41 |         cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
      |                    |                       |
      |                    |                       int
      |                    __gnu_cxx::__promote<double>::__type {aka double}
a.cc:49:27: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   49 |         cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
      |                    |                       |
      |                    |                       int
      |                    __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <iomanip>
#include <cmath>
#include <climits>
using namespace std;

bool comp(pair<int, string> a, pair<int, string> b){
    if(a.first != b.first) return a.first > b.first;
    else return a.second < b.second;
}

int main(){
    vector<long int> v;

    long int n;
    cin >> n;
    for(long int i = 0; i < n; ++i){
        long int a;
        cin >> a;
        v.push_back(a);
    }

    sort(v.begin(),v.end());

    if(n % 2 == 1){
        if(v[0] != 0){
            cout << 0 << endl;
            return 0;
        }
        for(long int i = 1;i < n; i += 2){
            if(v[i] != v[i + 1]){
                cout << 0 << endl;
                return 0;
            }
        }
        cout <<  << endl;
    }else{
        for(int i = 0;i < n; i += 2){
            if(v[i] != v[i + 1]){
                cout << 0 << endl;
                return 0;
            }
        }
        cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:18: error: expected primary-expression before '<<' token
   41 |         cout <<  << endl;
      |                  ^~
a.cc:49:27: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   49 |         cout << pow(2,n/2)%((int)pow(10,9) + 7) << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
      |                    |                       |
      |                    |                       int
      |                    __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>
using namespace std;
long long MOD = 1E9+7;
int main(){
  int n;
  cin >> n;
  int a[n],b[n]={};
  for(int i=0;i<n;i++){
    cin >> a[i];
    b[a[i]/2]++;
  }
  for(int i=0;i<(n+1)/2;i++){
      if(n%2){
        if(b[0]!=1) cout << 0 << endl;
        return 0;
      }
      else{
        if(b[i]!=2){
          cout << 0 << endl;
          return 0;
        }
      }
  }
  for(int i=1;i<=n/2;i++)c = (2*c)%MOD;
  cout << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:26: error: 'c' was not declared in this scope
   24 |   for(int i=1;i<=n/2;i++)c = (2*c)%MOD;
      |                          ^
a.cc:25:11: error: 'c' was not declared in this scope
   25 |   cout << c << endl;
      |           ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int N,ans=2;
    bool flag = true;
    cin >> N;
    vector<int> A(N/2 +1,0);

    for(int i=0;i<N;i++){
        int a;
        cin >> a;
        if(N%2==0){
            if(a%2==0){
                flag = false;
            }
        }else{
            if(a%2==1){
                flag = false;
            }
        }

        A[a/2]++;
    }

    if(N%2==1){
        for(int i=1;i<N/2+1;i++){
            if(A[0]!=1 || A[i] != 2){
                flag = false;
            }
        }
    }else{
        for(int i=0;i<N/2;i++){
            if(A[i] != 2){
                flag = false;
            }
        }
    }

    for(int i=0;i<N/2-1;i++){
        ans *= 2;
        ans %= 1000000007;
    }

    if(flag){
        cout << pow(2,N/2)%1000000007 << endl;
    }else{
        cout << "0" << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:47:27: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   47 |         cout << pow(2,N/2)%1000000007 << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~
      |                    |       |
      |                    |       int
      |                    __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int N;
    bool flag = true;
    cin >> N;
    vector<int> A(N/2 +1,0);

    for(int i=0;i<N;i++){
        int a;
        cin >> a;
        if(N%2==0){
            if(a%2==0){
                flag = false;
            }
        }else{
            if(a%2==1){
                flag = false;
            }
        }

        A[a/2]++;
    }

    if(N%2==1){
        for(int i=1;i<N/2+1;i++){
            if(A[0]!=1 || A[i] != 2){
                flag = false;
            }
        }
    }else{
        for(int i=0;i<N/2;i++){
            if(A[i] != 2){
                flag = false;
            }
        }
    }

    if(flag){
        cout << pow(2,N/2)%1000000007 << endl;
    }else{
        cout << "0" << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:27: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   42 |         cout << pow(2,N/2)%1000000007 << endl;
      |                 ~~~~~~~~~~^~~~~~~~~~~
      |                    |       |
      |                    |       int
      |                    __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
#define rep(i,n) for(int i=0;i<n;i++)
#define REP(i,s,n) for(int i=(s);i<(n);i++)
#define repr(i,n) for(int i=n-1;i>=0;i--)
#define REPR(i,s,n) for(int i=(s);i>=(n);i--)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define Eunique(v) v.erase(unique(all(v)),v.end())
#define pvec(v) rep(i,v.size()){cout << v[i] << " ";};cout<<endl;
#define pb push_back
#define pf push_front
#define mod 1e9+7
#define m_p make_pair
 
typedef vector<int> vi;
typedef vector<string> vs;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<int,int> pii;
typedef vector<pii> vpii;
typedef pair<ll,ll> pll;
typedef vector<pll> vpll;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvll;
const double pi = acos(-1.0);
 
ll gcd(ll x, ll y) { return (y == 0) ? x : gcd(y, x % y); }
ll lcm(ll x, ll y) { return x * y / gcd(x, y); }

bool IsPrime(int num)
{
    if (num < 2) return false;
    else if (num == 2) return true;
    else if (num % 2 == 0) return false;

    double sqrtNum = sqrt(num);
    for (int i = 3; i <= sqrtNum; i += 2)
    {
        if (num % i == 0)
        {
            return false;
        }
    }
    return true;
}

int main()
{
    ll n;
    bool b=true;
    map<ll,ll> mp;
    cin >> n;
    vll a(n);
    rep(i,n){
        cin >> a[i];
        mp[a[i]]++;
    }
    if(n%2==0){
        rep(i,n/2){
            if(mp[i*2+1]!=2) b=false;
        }
    }
    else{
        if(mp[0]!=1) b=false;
        rep(i,n/2){
            if(mp[(i+1)*2]!=2) b=false;
        }
    }
    cout << (b?pow(2,n/2)%1000000007:0) << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:71:26: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   71 |     cout << (b?pow(2,n/2)%1000000007:0) << endl;
      |                ~~~~~~~~~~^~~~~~~~~~~
      |                   |       |
      |                   |       int
      |                   __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include<iostream>
#include<numeric>
#include<algorithm>
using namespace std;
int main()
{
	int n;
	cin >> n;
	int a[100000];
	for (int i = 0; i < n;i++)
		cin >> a[i];
	int c = count(a, a + n, 0);
	if (n % 2 == 0 && c > 0 || n % 2 != 0 && c> 1)
		cout << "0";
	else
	{
		for (int i = 0; i < n;i++)
		{
			if (count(a, a + n, a[i]) > 2)
			{
				cout << "0";
				return(0);
			}
		}
		if (n % 2 == 0)
			cout << (n * 2)%((int)pow(10,9) + 7);
		else
			cout << (n - 1) % ((int)pow(10, 9) + 7);
	}
	


	return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:47: error: 'pow' was not declared in this scope
   26 |                         cout << (n * 2)%((int)pow(10,9) + 7);
      |                                               ^~~
a.cc:28:49: error: 'pow' was not declared in this scope
   28 |                         cout << (n - 1) % ((int)pow(10, 9) + 7);
      |                                                 ^~~
Language: C++

#include<iostream>
#include<numeric>
using namespace std;
int main()
{
	int n;
	cin >> n;
	int a[100000];
	for (int i = 0; i < n;i++)
		cin >> a[i];
	int c = count(a, a + n, 0);
	if (n % 2 == 0 && c > 0 || n % 2 != 0 && c> 1)
		cout << "0";
	else
	{
		if (n % 2 == 0)
			cout << n * 2;
		else
			cout << n - 1;
	}
	


	return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: 'count' was not declared in this scope
   11 |         int c = count(a, a + n, 0);
      |                 ^~~~~
Language: C++

#include<iostream>
#include<numeric>
using namespace std;
int main()
{
	int n;
	cin >> n;
	int a[100000];
	for (int i = 0; i < n;i++)
		cin >> a[i];
	if (n % 2 == 0 && count(a, a + n, 0) > 0 || n % 2 != 0 && count(a, a + n, 0) > 1)
		cout << "0";
	else
	{
		if (n % 2 == 0)
			cout << n * 2;
		else
			cout << n - 1;
	}
	


	return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:27: error: 'count' was not declared in this scope
   11 |         if (n % 2 == 0 && count(a, a + n, 0) > 0 || n % 2 != 0 && count(a, a + n, 0) > 1)
      |                           ^~~~~
Language: C++

#include <iostream>
#include <vector>
#include <map>


using namespace std;

long long int D = 1000000007;

int main(){
  int N;
  vector<int> a(N);
  
  for(int i = 0; i < N; i++) cin >> a[i];
  
  bool coh = true;
  long long int ans = 0LL;
  
  for(int i = 0; i < N; i++){
    if(a[i] < 0 || a[i] > N-1){
      coh = false;
      break;
    }
  }
  map<int, int> m;
  for(int i = 0; i < N; i++) m[a[i]]++;
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2) coh = false;
      ans = (ans * 2) % D;
    }
  }else{
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2){
        if(iter->first == 0 && iter->second == 1){
          ans = (ans * 2) % D;
        }else{
          coh = false;
        }
      }else{
        ans = (ans * 2) % D;
      }
    }
  }
  if(coh) cout << ans;
  else cout << 0;
}


Compiler output:
a.cc:31:4: error: expected unqualified-id before 'else'
   31 |   }else{
      |    ^~~~
a.cc:44:3: error: expected unqualified-id before 'if'
   44 |   if(coh) cout << ans;
      |   ^~
a.cc:45:3: error: expected unqualified-id before 'else'
   45 |   else cout << 0;
      |   ^~~~
a.cc:46:1: error: expected declaration before '}' token
   46 | }
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <map>


using namespace std;

long long int D = 1000000007;

int main(){
  int N;
  vector<int> a(N);
  
  for(int i = 0; i < N; i++) cin >> a[i];
  
  bool coh = true;
  long long int ans = 0LL;
  
  for(int i = 0; i < N; i++){
    if(a[i] < 0 || a[i] > N-1){
      coh = false;
      break;
    }
  }
  map<int, int> m;
  for(int i = 0; i < N; i++) m[a[i]]++;
  if(N
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2) coh = false;
      ans = (ans * 2) % D;
    }
  }else{
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2){
        if(iter->first == 0 && iter->second == 1){
          ans = (ans * 2) % D;
        }else{
          coh = false;
        }
      }else{
        ans = (ans * 2) % D;
      }
    }
  }
  if(coh) cout << ans;
  else cout << 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:7: error: expected ')' before 'for'
   27 |   if(N
      |     ~ ^
      |       )
   28 |     for(auto iter = m.begin(); iter != m.end(); iter++){
      |     ~~~
a.cc:28:32: error: 'iter' was not declared in this scope
   28 |     for(auto iter = m.begin(); iter != m.end(); iter++){
      |                                ^~~~
a.cc: At global scope:
a.cc:32:4: error: expected unqualified-id before 'else'
   32 |   }else{
      |    ^~~~
a.cc:45:3: error: expected unqualified-id before 'if'
   45 |   if(coh) cout << ans;
      |   ^~
a.cc:46:3: error: expected unqualified-id before 'else'
   46 |   else cout << 0;
      |   ^~~~
a.cc:47:1: error: expected declaration before '}' token
   47 | }
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <map>


using namespace std;

long long int D = 1000000007;

int main(){
  int N;
  vector<int> a(N);
  
  for(int i = 0; i < N; i++) cin >> a[i];
  
  bool coh = true;
  long long int ans = 0LL;
  
  for(int i = 0; i < N; i++){
    if(a[i] < 0 || a[i] > N-1){
      coh = false;
      break;
    }
  }
  map<int, int> m;
  for(int i = 0; i < N; i++) m[a[i]]++;
  if(N
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2) coh = false;
      ans = (ans * 2) % D;
    }
  }else{
    for(auto iter = m.begin(); iter != m.end(); iter++){
      if(iter->second != 2){
        if(iter->first == 0 && iter->second == 1){
          ans = (ans * 2) % D;
        }else coh = false;
      }else{
        ans = (ans * 2) % D;
      }
    }
  }
  if(coh) cout << ans;
  else cout << 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:7: error: expected ')' before 'for'
   27 |   if(N
      |     ~ ^
      |       )
   28 |     for(auto iter = m.begin(); iter != m.end(); iter++){
      |     ~~~
a.cc:28:32: error: 'iter' was not declared in this scope
   28 |     for(auto iter = m.begin(); iter != m.end(); iter++){
      |                                ^~~~
a.cc: At global scope:
a.cc:32:4: error: expected unqualified-id before 'else'
   32 |   }else{
      |    ^~~~
a.cc:43:3: error: expected unqualified-id before 'if'
   43 |   if(coh) cout << ans;
      |   ^~
a.cc:44:3: error: expected unqualified-id before 'else'
   44 |   else cout << 0;
      |   ^~~~
a.cc:45:1: error: expected declaration before '}' token
   45 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#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 INF 1e9
#define ALL(v) v.begin(), v.end()
typedef long long ll;
#define downque(que)  priority_queue<ll> que;
#define upque(que) priority_queue<ll, vector<int>, greater<int>> que;



int main(){
 int n; cin>>n;
 vector<int> a(n);
 bool check=true;
 REP(i,n)cin>>a[i];
 sort(ALL(a));
 ll ans =0;

 if(n%2==0){
 for(int i=0;i<n-1;i+=2){
   if(a[i]!=i+1||a[i]!=a[i+1]){
     check=false;
     break;
   }
 }
 }else{
   if(a[0]!=0)check=false;
   for(int i=1;i<n-1;i+=2){
   if(a[i]!=i+1||a[i]!=a[i+1]){
     check=false;
     break;
   }
 }
 }
if(check){
  if(n%2==0)ans=pow(2,n/2);
  else ans=pow(2,(n-1)/2);
  ans%(1e9+7);
  cout<<ans<<endl;
}else cout<<0<<endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:6: error: invalid operands of types 'll' {aka 'long long int'} and 'double' to binary 'operator%'
   41 |   ans%(1e9+7);
      |   ~~~^~~~~~~~
      |   |       |
      |   |       double
      |   ll {aka long long int}
Language: Java

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

int main() {

  int N;
  cin >> N;

  vector<int> number(100100);
  for (int i = 0; i < N; i++) {
    int a;
    cin >> a;
    number[a]++;
  }

  int mod = 1000000000 + 7;
  
  bool valid = true;

  if (N % 2 != 0) {
    if (number[0] != 1) {
      valid = false;
    } else {
      for (int i = 1; i < N; i++) {
        if (i % 2 == 0) {
          if (number[i] != 2) {
            valid = false;
            break;
          }
        } else {
          if (number[i] != 0) {
            valid = false;
            break;
          }
        }
      }
    }
  } else {
    if (number[0] != 0) {
      valid = false;
    } else {
      for (int i = 1; i < N; i++) {
        if (i % 2 == 0) {
          if (number[i] != 0) {
            valid = false;
            break;
          }
        } else {
          if (number[i] != 2) {
            valid = false;
            break;
          }
        }
      }
    }
  }

  if (valid){

    int count = 1;

    for (int i = 1; i <= N / 2; i++) {
      count = (count * 2) % mod;
    }

    cout << count << endl;

  } else {

    cout << 0 << endl;
  
  }

}

Compiler output:
Main.java:1: error: illegal character: '#'
#include <bits/stdc++.h>
^
Main.java:1: error: class, interface, enum, or record expected
#include <bits/stdc++.h>
         ^
Main.java:7: error: not a statement
  cin >> N;
      ^
Main.java:12: error: not a statement
    cin >> a;
        ^
Main.java:66: error: not a statement
    cout << count << endl;
                  ^
Main.java:70: error: not a statement
    cout << 0 << endl;
              ^
Main.java:4: error: unnamed classes are a preview feature and are disabled by default.
int main() {
^
  (use --enable-preview to enable unnamed classes)
Main.java:9: error: ';' expected
  vector<int> number(100100);
                    ^
8 errors