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

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
using namespace std;
int main(){
  int N;
  cin>>N;
  vector<int>A(N);
  for (int i=0;i<N;++i){
    cin>>A[i];
  }  
  bool Flag=true;
  long long ans=0;
  long long MOD=1000000007;                
  
  if (N%2==0){
    for (int i=0;i<N;++i){
      if (A[i]%2==0){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=1;i<(N+1)/2;i+=2){
      if (count(A.begin(), A.end(),i)!=2){
        Flag=false;
        break;
      }
    }
    if (Flag){
      ans=N/2;
      ans=pow(2,ans)%MOD;
      cout<<ans<<endl;
    }
  }
  
  if (N%2==1){
    for (int i=0;i<N;++i){
      if (A[i]%2==1){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=2;i<(N+1)/2;i+=2){
      if (count(A.begin(), A.end(),0)!=1){
        Flag=false;
        break;
      }      
      else if (count(A.begin(), A.end(),i)!=2){
        Flag=false;
        break;
      }
    }
    if (Flag){
      ans=(N-1)/2;
      ans=pow(2,ans)%MOD;
      cout<<ans<<endl;
    }
  }
  
  if (!Flag){
    cout<<"0"<<endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:33:21: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'long long int' to binary 'operator%'
   33 |       ans=pow(2,ans)%MOD;
      |           ~~~~~~~~~~^~~~
      |              |       |
      |              |       long long int
      |              __gnu_cxx::__promote<double>::__type {aka double}
a.cc:58:21: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'long long int' to binary 'operator%'
   58 |       ans=pow(2,ans)%MOD;
      |           ~~~~~~~~~~^~~~
      |              |       |
      |              |       long long int
      |              __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
  int N;cin>>N;
  vector<int>A(N);
  for (int i=0;i<N;++i){
    cin>>A[i];
  }
  
  bool Flag=true;
  long long ans=0;
  long long MOD=1000000009;
  
  if (N%2==0){
    for (int i=0;i<N;++i){
      if (A[i]%2==0){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=1;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=(N/2)*(N/2);
  cout<<ans%MOD<<endl;
  
  else{
    for (int i=0;i<N;++i){
      if (A[i]%2==1){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=2;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),0)!=1){
        break;
      }      
      else if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=((N-1)/2)*((N-1)/2);
  cout<<ans%MOD<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:3: error: 'else' without a previous 'if'
   32 |   else{
      |   ^~~~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
  int N;cin>>N;
  vector<int>A(N);
  for (int i=0;i<N;++i){
    cin>>A[i];
  }
  
  bool Flag=true;
  long long ans=0;
  long long MOD=1000000009;
  
  if (N%2==0){
    for (int i=0;i<N;++i){
      if (A[i]%2==0){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=1;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=(N/2)*(N/2);
  cout<<ans%MOD<<endl;
  
  else{
    for (int i=0;i<N;++i){
      if (A[i]%2==1){
        Flag=false;
        break;
      }
      break;
    }
    for (int 2=0;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),0)!=1){
        break;
      }      
      else if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=((N-1)/2)*((N-1)/2);
  cout<<ans%MOD<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:3: error: 'else' without a previous 'if'
   32 |   else{
      |   ^~~~
a.cc:40:14: error: expected unqualified-id before numeric constant
   40 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:40:13: error: expected ';' before numeric constant
   40 |     for (int 2=0;i<(N+1);i+=2)
      |             ^~
      |             ;
a.cc:40:14: error: lvalue required as left operand of assignment
   40 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:40:18: error: 'i' was not declared in this scope
   40 |     for (int 2=0;i<(N+1);i+=2)
      |                  ^
a.cc:40:25: error: expected ')' before ';' token
   40 |     for (int 2=0;i<(N+1);i+=2)
      |         ~               ^
      |                         )
a.cc:40:26: error: 'i' was not declared in this scope
   40 |     for (int 2=0;i<(N+1);i+=2)
      |                          ^
a.cc:44:7: error: 'else' without a previous 'if'
   44 |       else if (count(A.begin(), A.end(),i)!=2){
      |       ^~~~
a.cc:45:9: error: break statement not within loop or switch
   45 |         break;
      |         ^~~~~
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];
  }
  
  bool Flag=true;
  long long ans=0;
  long long MOD=1000000009;
  
  if (N%2==0){
    for (int i=0;i<N;++i){
      if (A[i]%2==0){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=1;i<(N+1);i+=2)
      if (std::count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=(N/2)*(N/2);
  cout<<ans%MOD<<endl;
  
  else{
    for (int i=0;i<N;++i){
      if (A[i]%2==1){
        Flag=false;
        break;
      }
      break;
    }
    for (int 2=0;i<(N+1);i+=2)
      if (std::count(A.begin(), A.end(),0)!=1){
        break;
      }      
      else if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=((N-1)/2)*((N-1)/2);
  cout<<ans%MOD<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:16: error: 'count' is not a member of 'std'; did you mean 'cout'?
   24 |       if (std::count(A.begin(), A.end(),i)!=2){
      |                ^~~~~
      |                cout
a.cc:31:3: error: 'else' without a previous 'if'
   31 |   else{
      |   ^~~~
a.cc:39:14: error: expected unqualified-id before numeric constant
   39 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:39:13: error: expected ';' before numeric constant
   39 |     for (int 2=0;i<(N+1);i+=2)
      |             ^~
      |             ;
a.cc:39:14: error: lvalue required as left operand of assignment
   39 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:39:18: error: 'i' was not declared in this scope
   39 |     for (int 2=0;i<(N+1);i+=2)
      |                  ^
a.cc:39:25: error: expected ')' before ';' token
   39 |     for (int 2=0;i<(N+1);i+=2)
      |         ~               ^
      |                         )
a.cc:39:26: error: 'i' was not declared in this scope
   39 |     for (int 2=0;i<(N+1);i+=2)
      |                          ^
a.cc:43:7: error: 'else' without a previous 'if'
   43 |       else if (count(A.begin(), A.end(),i)!=2){
      |       ^~~~
a.cc:43:16: error: 'count' was not declared in this scope
   43 |       else if (count(A.begin(), A.end(),i)!=2){
      |                ^~~~~
a.cc:44:9: error: break statement not within loop or switch
   44 |         break;
      |         ^~~~~
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];
  }
  
  bool Flag=true;
  long long ans=0;
  long long MOD=1000000009;
  
  if (N%2==0){
    for (int i=0;i<N;++i){
      if (A[i]%2==0){
        Flag=false;
        break;
      }
      break;
    }
    for (int i=1;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=(N/2)*(N/2);
  cout<<ans%MOD<<endl;
  
  else{
    for (int i=0;i<N;++i){
      if (A[i]%2==1){
        Flag=false;
        break;
      }
      break;
    }
    for (int 2=0;i<(N+1);i+=2)
      if (count(A.begin(), A.end(),0)!=1){
        break;
      }      
      else if (count(A.begin(), A.end(),i)!=2){
        break;
      }
  }
  ans=((N-1)/2)*((N-1)/2);
  cout<<ans%MOD<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:11: error: 'count' was not declared in this scope
   24 |       if (count(A.begin(), A.end(),i)!=2){
      |           ^~~~~
a.cc:31:3: error: 'else' without a previous 'if'
   31 |   else{
      |   ^~~~
a.cc:39:14: error: expected unqualified-id before numeric constant
   39 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:39:13: error: expected ';' before numeric constant
   39 |     for (int 2=0;i<(N+1);i+=2)
      |             ^~
      |             ;
a.cc:39:14: error: lvalue required as left operand of assignment
   39 |     for (int 2=0;i<(N+1);i+=2)
      |              ^
a.cc:39:18: error: 'i' was not declared in this scope
   39 |     for (int 2=0;i<(N+1);i+=2)
      |                  ^
a.cc:39:25: error: expected ')' before ';' token
   39 |     for (int 2=0;i<(N+1);i+=2)
      |         ~               ^
      |                         )
a.cc:39:26: error: 'i' was not declared in this scope
   39 |     for (int 2=0;i<(N+1);i+=2)
      |                          ^
a.cc:43:7: error: 'else' without a previous 'if'
   43 |       else if (count(A.begin(), A.end(),i)!=2){
      |       ^~~~
a.cc:43:16: error: 'count' was not declared in this scope
   43 |       else if (count(A.begin(), A.end(),i)!=2){
      |                ^~~~~
a.cc:44:9: error: break statement not within loop or switch
   44 |         break;
      |         ^~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <list>
#include <map>
#include <queue>
#include <stack>
#include <algorithm>
#include <fstream>
#include <sstream>
#include <iomanip>

using namespace std;

long long MOD = 1000000007;

int main(){
    int N;
    cin >> N;
    vector<int> cnt(N,0);
    cnt[0]=1;
    for(int i=1; 2*i=>N; i++){
        cnt[N-2*i]=2;
    }

    long long ans=1;
    for(int i=0; i<N; i++){
        int A;
        cin >> A;
        cnt[A]++;
        if(cnt[A]>2){
            cout << 0 << endl;
            return 0;
        }else if(cnt[A]==1){
            ans*=2;
            ans%=MOD;
        }
    }
    cout << ans << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:22: error: expected primary-expression before '>' token
   22 |     for(int i=1; 2*i=>N; i++){
      |                      ^
Language: C++

#include <bits/stdc++.h>
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define RFOR(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define rep(i,n) FOR(i,0,(n))
#define REPS(i,n) FOR(i,1,(n)+1)
#define RREP(i,n) RFOR(i,0,(n))
#define ALL(x) (x).begin(),(x).end()
#define RALL(x) (x).rbegin(),(x).rend()
#define DEBUG(x)  cout << #x << " = " << (x) << endl;
#define SORT(x) sort(ALL(x)m);
#define RSORT(x) sort(RALL(x));
#define SUM(x) accumulate(ALL(x),0);
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define sz(x) (int)(x).size()
#define bn(x) ((1<<x)-1)
#define dup(x,y) (((x)+(y)-1)/(y))
using namespace std;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;
using vll = vector<ll>;
using pii = pair<int, int>;
using tiii = tuple<int, int, int>;
const ll mod = 1e9+7;
const int INF = (1<<30)-1;
const ll INFLL = (1LL<<62)-1;
const int dx[4] = {1,0,-1,0};
const int dy[4] = {0,1,0,-1};
//cout << fixed << setprecision(10);

template<class T> inline int sgn(T n) { if (n > 0) return 1; else if (n < 0) return -1; else return 0; }

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

ll gcd(ll a, ll b) { return b ? gcd(b,a%b) : a;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}


int main () {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  
  int n;
  cin >> n;
  vi a(n);
  rep(i,n) cin >> a[i];
  
  vi b;
  rep(i,n) {
    b.push_back(abs(n-1-2*i));
  }
  
  SORT(a);
  SORT(b);
  
  if (a == b) {
    ll ans = 1;
    rep(_,n/2) {
      ans *= 2;
    }
    cout << ans << endl;
  }
  else {
    cout << 0 << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:28: error: expected ')' before 'm'
   10 | #define SORT(x) sort(ALL(x)m);
      |                     ~      ^
a.cc:57:3: note: in expansion of macro 'SORT'
   57 |   SORT(a);
      |   ^~~~
a.cc:10:28: error: expected ')' before 'm'
   10 | #define SORT(x) sort(ALL(x)m);
      |                     ~      ^
a.cc:58:3: note: in expansion of macro 'SORT'
   58 |   SORT(b);
      |   ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define INF -2147483647
int main(){
  int a,d=-1,q=1,w=1;
  int b,c[1000000]={};
  cin>>a;
  for(int i=0;i<a;i++){
    cin>>b;
    c[b]++;
  }
  if(a%2==0&&c[0]!=0) w=1;
  if(a%2==1&&c[0]!=1) w=1; 
  if(w==1){
    for(int i=1;i<=a;i++){
      if(c[i]==1||c[i]>=3) {
	q=0;
	break;
      }
      else d++;
    }
  }
  if(q==1) cout<<(((d+1)/2)*((d+1)/2))%100000007;
  //if(q==1&&a%2==1) cout<<((d+1)/2)*((d+1)/2);
  else cout<<"0";
  cout<<"\n";
} 

Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define INF -2147483647
int main(){
  int a,d=-1,q=1,w=1;
  int b,c[1000000]={};
  cin>>a;
  for(int i=0;i<a;i++){
    cin>>b;
    c[b]++;
  }
  if(a%2==0&&c[0]!=0) w=1;
  if(a%2==1&&c[0]!=1) w=1; 
  if(w==1){
    for(int i=1;i<=a;i++){
      if(c[i]==1||c[i]>=3) {
	q=0;
	break;
      }
      else d++;
    }
  }
  if(q==1) cout<<(((d+1)/2)*((d+1)/2))%100000007;
  //if(q==1&&a%2==1) cout<<((d+1)/2)*((d+1)/2);
  else cout<<"0";
  cout<<"\n";
} 
#include<bits/stdc++.h>
using namespace std;
#define INF -2147483647
int main(){
  int a,d=-1,q=1,w=1;
  int b,c[1000000]={};
  cin>>a;
  for(int i=0;i<a;i++){
    cin>>b;
    c[b]++;
  }
  if(a%2==0&&c[0]!=0) w=1;
  if(a%2==1&&c[0]!=1) w=1; 
  if(w==1){
    for(int i=1;i<=a;i++){
      if(c[i]==1||c[i]>=3) {
	q=0;
	break;
      }
      else d++;
    }
  }
  if(q==1) cout<<(((d+1)/2)*((d+1)/2))%100000007;
  //if(q==1&&a%2==1) cout<<((d+1)/2)*((d+1)/2);
  else cout<<"0";
  cout<<"\n";
}

Compiler output:
cc1plus: error: '::main' must return 'int'
cc1plus: error: '::main' must return 'int'
a.cc:32:5: error: redefinition of 'int main()'
   32 | int main(){
      |     ^~~~
a.cc:5:5: note: 'int main()' previously defined here
    5 | int main(){
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define INF -2147483647
int main(){
  int a,d=-1,q=1,w=1;
  int b,c[1000000]={};
  cin>>a;
  for(int i=0;i<a;i++){
    cin>>b;
    c[b]++;
  }
  if(a%2==0&&c[0]!=0) w=1;
  if(a%2==1&&c[0]!=1) w=1; 
  if(w==1){
    for(int i=1;i<=a;i++){
      if(c[i]==1||c[i]>=3) {
	q=0;
	break;
      }
      else d++;
    }
  }
  if(q==1&&) cout<<(((d+1)/2)*((d+1)/2))%100000007;
  //if(q==1&&a%2==1) cout<<((d+1)/2)*((d+1)/2);
  else cout<<"0";
  cout<<"\n";
} 


Compiler output:
a.cc: In function 'int main()':
a.cc:23:12: error: expected primary-expression before ')' token
   23 |   if(q==1&&) cout<<(((d+1)/2)*((d+1)/2))%100000007;
      |            ^
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[i]=sc.nextInt();
      Arrays.sort(a);
      if(a[0]==0){
        if(n%2==0){
        	System.out.println(0);
            return;
        }else{
          for(int i = 1;i < n;i+=2){
          	if(a[i]!=a[i+1]||a[i]!=i+1){
          		System.out.println(0);
            	return;
          	}
      	  }
        }
      }else if(a[0]==1){
      	if(n%2==1){
        	System.out.println(0);
            return;
        }else{
          for(int i = 0;i < n;i+=2){
          	if(a[i]!=a[i+1]||a[i]!=i+1){
            	System.out.println(0);
                return;
            }
          }
        }
      }else{
      	System.out.println(0);
        return;
      }
      int x = n/2;
      long p = (long)Math.pow(2,x);
      long q = 1000000007
      System.out.println(p%q);
    }
    public static int lcm(int x, int y){
      return x*y/gcd(x,y);
    }
    public static int gcd(int x, int y){
      if(x < y)return gcd(y,x);
      if(y==0)return x;
      return gcd(y,x%y);
    }
}


Compiler output:
Main.java:39: error: ';' expected
      long q = 1000000007
                         ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using vb = vector<bool>;
using vc = vector<char>;
using vs = vector<string>;
using vvi = vector<vector<int>>;
using vvc = vector<vector<char>>;
using pii = pair<int, int>;
#define fix10 cout << fixed << setprecision(10);
#define MOD 1e9+7;
#define rep(i,n) for(int i=0; i<(int)(n);i++)

int main(){
  int n;
  cin >> n;
  vector<int> a(n);
  vector<int> counter(n,0);
  int tmp;
  rep(i,n){
    cin >> tmp;
    a.at(i) = tmp;
    counter.at(tmp)++;
  }
  if(n % 2 == 0){
    for(int i = 1; i < n ;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }else{
    if(counter.at(0) != 1){
      cout << 0 << endl;
      return 0;
    }
    for(int i=2;i < n;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }
  long answer = 1;
  rep(i,n/2){
    answer *= 2;
    answer %= MOD;
  }
  cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:12: error: invalid operands of types 'long int' and 'double' to binary 'operator%'
   47 |     answer %= MOD;
      |            ^
a.cc:47:12: note:   in evaluation of 'operator%=(long int, double)'
Language: C++

#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using vb = vector<bool>;
using vc = vector<char>;
using vs = vector<string>;
using vvi = vector<vector<int>>;
using vvc = vector<vector<char>>;
using pii = pair<int, int>;
#define fix10 cout << fixed << setprecision(10);
#define MOD 1e9+7;
#define rep(i,n) for(int i=0; i<(int)(n);i++)

int main(){
  int n;
  cin >> n;
  vector<int> a(n);
  vector<int> counter(n,0);
  int tmp;
  rep(i,n){
    cin >> tmp;
    a.at(i) = tmp;
    counter.at(tmp)++;
  }
  if(n % 2 == 0){
    for(int i = 1; i < n ;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }else{
    if(counter.at(0) != 1){
      cout << 0 << endl;
      return 0;
    }
    for(int i=2;i < n;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }
  long answer = 1
  rep(i,n/2){
    answer *= 2;
    answer %= MOD;
  }
  cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:18: error: expected ',' or ';' before 'for'
   12 | #define rep(i,n) for(int i=0; i<(int)(n);i++)
      |                  ^~~
a.cc:45:3: note: in expansion of macro 'rep'
   45 |   rep(i,n/2){
      |   ^~~
a.cc:45:7: error: 'i' was not declared in this scope
   45 |   rep(i,n/2){
      |       ^
a.cc:12:31: note: in definition of macro 'rep'
   12 | #define rep(i,n) for(int i=0; i<(int)(n);i++)
      |                               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using vb = vector<bool>;
using vc = vector<char>;
using vs = vector<string>;
using vvi = vector<vector<int>>;
using vvc = vector<vector<char>>;
using pii = pair<int, int>;
#define fix10 cout << fixed << setprecision(10);
#define rep(i,n) for(int i=0; i<(int)(n);i++)
#define MOD 1e9+7;

int main(){
  int n;
  cin >> n;
  vector<int> a(n);
  vector<int> counter(n,0);
  int tmp;
  rep(i,n){
    cin >> tmp;
    a.at(i) = tmp;
    counter.at(tmp)++;
  }
  if(n % 2 == 0){
    for(int i = 1; i < n ;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }else{
    if(counter.at(0) != 1){
      cout << 0 << endl;
      return 0;
    }
    for(int i=2;i < n;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }
  long answer = 1
  rep(i,n/2){
    answer *= 2;
    answer %= MOD;
  }
  cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: expected ',' or ';' before 'for'
   11 | #define rep(i,n) for(int i=0; i<(int)(n);i++)
      |                  ^~~
a.cc:45:3: note: in expansion of macro 'rep'
   45 |   rep(i,n/2){
      |   ^~~
a.cc:45:7: error: 'i' was not declared in this scope
   45 |   rep(i,n/2){
      |       ^
a.cc:11:31: note: in definition of macro 'rep'
   11 | #define rep(i,n) for(int i=0; i<(int)(n);i++)
      |                               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using vb = vector<bool>;
using vc = vector<char>;
using vs = vector<string>;
using vvi = vector<vector<int>>;
using vvc = vector<vector<char>>;
using pii = pair<int, int>;
#define fix10 cout << fixed << setprecision(10);
#define rep(i,n) for(int i=0; i<(int)(n);i++);
#define MOD 1e9+7;

int main(){
  int n;
  cin >> n;
  vector<int> a(n);
  vector<int> counter(n,0);
  int tmp;
  rep(i,n){
    cin >> tmp;
    a.at(i) = tmp;
    counter.at(tmp)++;
  }
  if(n % 2 == 0){
    for(int i = 1; i < n ;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }else{
    if(counter.at(0) != 1){
      cout << 0 << endl;
      return 0;
    }
    for(int i=2;i < n;i += 2){
      if(counter.at(i) != 2){
        cout << 0 << endl;
        return 0;
      }
    }
  }
  long answer = 1
  rep(i,n/2){
    answer *= 2;
    answer %= MOD;
  }
  cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:10: error: 'i' was not declared in this scope
   22 |     a.at(i) = tmp;
      |          ^
a.cc:11:18: error: expected ',' or ';' before 'for'
   11 | #define rep(i,n) for(int i=0; i<(int)(n);i++);
      |                  ^~~
a.cc:45:3: note: in expansion of macro 'rep'
   45 |   rep(i,n/2){
      |   ^~~
a.cc:45:7: error: 'i' was not declared in this scope
   45 |   rep(i,n/2){
      |       ^
a.cc:11:31: note: in definition of macro 'rep'
   11 | #define rep(i,n) for(int i=0; i<(int)(n);i++);
      |                               ^
a.cc:47:12: error: invalid operands of types 'long int' and 'double' to binary 'operator%'
   47 |     answer %= MOD;
      |            ^
a.cc:47:12: note:   in evaluation of 'operator%=(long int, double)'
Language: C++

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

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)   FOR(i,0,n)
#define MOD 1000000007

typedef long long int ll;

const ll INF=(ll)1e18;

ll mod_pow(ll x,ll n, ll mod){
  if(n==0) return 1;
  ll res = mod_pow(x*x%mod, n/2, mod);
 
  if(n&1) res = res*x%mod;

  return res;
}

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

  map<int, int> m;

  REP(i,N){
    int a;
    cin >> a;
    m[a]++;
  }

  bool flag = 
  if(N%2&1){
    for(int i = 0; i < N; i+=2){
      if(i==0){
        if(m[i]!=1){
          cout << 0 << endl;
          return 0;
        }
      }else{
        if(m[i]!=2){
          cout << 0 << endl;
          return 0;
        }
      }
    }
  }else{
    for(int i = 1; i < N; i+=2){
      if(m[i]!=2){
        cout << 0 << endl;
        return 0;
      }
    }
  }

  cout << mod_pow(2, N/2, MOD) << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:34:3: error: expected primary-expression before 'if'
   34 |   if(N%2&1){
      |   ^~
Language: C++

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

int main(){

int N;
cin >> N;
int A[N];
rep(i,N)cin >> A[i];
int a[N];
rep(i,N)a[i] = A[i];
int M=0;
sort(a,a+N);

if(N%2==1){
  for(int i=1;i<N;i+=2){
    if((a[i+1]-a[i])!=0)M++;}
  }
else{
  for(int i=0;i<N;i+=2){
    if((a[i+1]-a[i])!=0)M++;}
}

  if(M==0)cout <<  pow(2,N/2)%(1000000000+7) << endl;
  else cout << 0 << endl; 

return 0;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:25:30: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   25 |   if(M==0)cout <<  pow(2,N/2)%(1000000000+7) << endl;
      |                    ~~~~~~~~~~^~~~~~~~~~~~~~~
      |                       |                  |
      |                       |                  int
      |                       __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
    int n; cin >> n;
    int arr[n];
    unordered_map<int, int> m, vis;
    for(int i=0; i<n; i++){
        cin >> arr[i];
        m[arr[i]] += 1;
    }
    ll ans = 1;
    for(auto j:m){
        if(vis[j.first]) continue;
        if(j.second > 2) ans *= 0;
        if(j.first == 0 && j.second > 1) ans*=0;
        if(j.first != 0){ans *= 2; ans %= 1000000007}
        vis[j.first] = 1;
    }
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:53: error: expected ';' before '}' token
   17 |         if(j.first != 0){ans *= 2; ans %= 1000000007}
      |                                                     ^
      |                                                     ;
Language: C++

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

int main() {
	int n; cin >> n;
	map<int, int>a;
	for (int i = 0; i < n; i++) {
		int tmp; cin >> tmp;
		a[tmp]++;
	}

	for (auto x : a) {
		if (x.first == 0) {
			if (n % 2 == 0) {
				if (x.second > 0) {
					cout << 0 << endl;
					return 0;
				}
			}
			else {
				if (x.second != 1) {
					cout << 0 << endl;
					return 0;
				}
			}
		}
		else {
			if (x.second != 2) {
				cout << 0 << endl;
				return 0;
			}
		}
	}
	cout << pow(2,n/2) << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:17: error: 'pow' was not declared in this scope
   35 |         cout << pow(2,n/2) << endl;
      |                 ^~~
Language: C++

#include <iostream>
#include <string>
#include <list>

using namespace std;

int OutNumList(list<int>::iterator itr,const int &i) {


	if (i < 0) {
		for (int k = 0; k > i; k--) 
		{
			itr--;
		}
	}
	else {
		for (int k = 0; i > k; k++) 
		{
			itr++;
		}
	}

	return *itr;
}

int main() {
	// 変数定義
	list<int> lisN;
	int result = 1;
	int A;
	int buf = 0;

	const int WARU = 1000000007;
	bool boo = false;

	// 人数の指定
	scanf_s("%1d", &A);

	for (int i = 0; i < A; i++) {


		scanf_s("%1d", &buf);
		lisN.push_back(buf);

		if (lisN.size() >= 2) {

			lisN.sort();
			
			for (auto itr = lisN.begin(); itr != lisN.end();) {

				if (*itr == 0) {

					if (boo) {
						printf("0");
						return 0;
					};

					if (A % 2) {
						boo = true;
						itr = lisN.erase(itr);
						lisN.resize(lisN.size());
					}
					else {
						printf("0");
						return 0;
					};

					itr++;

				}

				else {
					
					if (OutNumList(itr,0) == OutNumList(itr,0))
					{
						result = result * 2;

						itr = lisN.erase(itr);

						itr = lisN.erase(itr);

						lisN.resize(lisN.size());
						
					}
					else itr++;

				}

			}

			

			if (result >= WARU) {
				result = result % WARU;
				printf("%d", result);
				return 0;
			}

		}
	}


		
	
	printf("%d", result);

	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   37 |         scanf_s("%1d", &A);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include <string>
#include <list>

using namespace std;

int OutNumList(list<int>::iterator itr,const int &i) {


	if (i < 0) {
		for (int k = 0; k > i; k--) {
			itr--;
		}
	}
	else {
		for (int k = 0; i > k; k++) {
			itr++;
		}
	}

	return *itr;
}

int main() {
	// 変数定義
	list<int> lisN;
	int result = 1;
	int A;
	int buf = 0;

	const int WARU = 1000000007;
	bool boo = false;

	// 人数の指定
	scanf_s("%1d", &A);

	for (int i = 0; i < A; i++) {


		scanf_s("%1d", &buf);
		lisN.push_back(buf);

		if (lisN.size() >= 2) {

			lisN.sort();

			//for (int x : lisN) { cout <<"  "<< x; }
			
			for (auto itr = lisN.begin(); itr != lisN.end();) {

				if (*itr == 0) {

					if (boo) {
						printf("0");
						return 0;
					};

					if (A % 2) {
						boo = true;
						itr = lisN.erase(itr);
						lisN.resize(lisN.size());
					}
					else {
						printf("0");
						return 0;
					};

					itr++;
				
				}// (*itr == 0)

				else {
					
					if (OutNumList(itr,0) == OutNumList(itr,0))
					{
						result = result * 2;

						itr = lisN.erase(itr);
						//cout << "itr=" << *itr << endl;
						itr = lisN.erase(itr);

						lisN.resize(lisN.size());

						//for (int x : lisN) { cout << " " << x << endl; }
						
					}
					else itr++;

				}

			}//for(auto itr = lisN.begin(); itr != lisN.end();)

			

			if (result >= WARU) {
				result = result % WARU;
				printf("%d", result);
				return 0;
			}

		}//(lisN.size() >= A)
	}


		
	
	printf("%d", result);

	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
   35 |         scanf_s("%1d", &A);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<map>
#include<set>
#include<stack>
#include<queue>
#include<math.h>
using namespace std;
typedef long long ll;
#define int long long
typedef vector<int> VI;
typedef pair<int, int> pii;
typedef priority_queue<int> PQ;
#define fore(i,a) for(auto &i:a)
#define REP(i,n) for(int i=0;i<n;i++)
#define eREP(i,n) for(int i=0;i<=n;i++)
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define eFOR(i,a,b) for(int i=(a);i<=(b);++i)
#define SORT(c) sort((c).begin(),(c).end())
#define rSORT(c) sort((c).rbegin(),(c).rend())
#define LB(x,a) lower_bound((x).begin(),(x).end(),(a))
#define UB(x,a) upper_bound((x).begin(),(x).end(),(a))
#define INF 1000000000
#define LLINF 9223372036854775807
#define mod 1000000007
//vector<vector<int> > dp;
//vector<vector<vector<int> > > vvvi;
//dp=vector<vector<int> >(N, vector<int>(M,0));
//vector<pair<int,int> > v;
//v.push_back(make_pair(x,y));
//priority_queue<int,vector<int>, greater<int> > q2;



signed main(){
cin.tie(0);
ios::sync_with_stdio(false);

	int N;
	cin >> N;
	map<int, int>mp;
	bool F = true;
	REP(i, N) {
		int a;
		cin >> a;
		if (a != 0 && N % 2 == 1 && a % 2 == 0) {
			F = false;
		}
		else if (a != 0N % 2 == 0 && a % 2 == 1) {
			F = false;
		}
		mp[a]++;
		if (a == 0 && mp[a] >= 2) {
			F = false;
		}
		if (mp[a] >= 3) {
			F = false;
		}
	}
	if (F) {
		cout << (N/2)*(N/2) % mod << endl;
	}
	else {
		cout << 0 << endl;
	}
	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:51:31: error: unable to find numeric literal operator 'operator""N'
   51 |                 else if (a != 0N % 2 == 0 && a % 2 == 1) {
      |                               ^~
Language: C++

#include <iostream>
#include <iomanip>
#include <stdio.h>
#include <math.h>
#include <string>
//#include <search.h>
#include <algorithm>
//#include <vector>
using namespace std;
int main()
{
 int n,arr[100000],arr2[100000]={0},s=0,check=0;
 cin>>n;
 for(int i=0;i<n;i++){
    cin>>arr[i];
    if(arr2[arr[i]]==0 && arr[i]!=0){
            s++;
    }
    arr2[arr[i]]++;
 }
// if(arr2[n-1]<2) cout<<0;
 else{
    cout<<s*s;
 }

return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:2: error: 'else' without a previous 'if'
   22 |  else{
      |  ^~~~
Language: Java

import java.util.Arrays;
import java.util.Scanner;

class Main{
	static long mod=1000000007; // 10e9 + 7
	static long pow(long a, long x){
		if(x == 1) return a % mod;
		else if(x % 2 == 0) return pow((a * a) % mod, x / 2) % mod;
		else return (a * pow((a * a) % mod, x / 2)) % mod;
	}
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] A = new int[N];
		int[] B = new int[N];
		for(int i = 0; i < N; i++) A[i] = sc.nextInt();
		if(N % 2 == 0) {
			for(int i = 0; i + 1 < N; i += 2) {
				B[i] = i + 1; B[i + 1] = i + 1;
			}
		}else {
			B[0] = 0;
			for(int i = 1; i + 1 < N; i += 2) {
				B[i] = i + 1; B[i + 1] = i + 1;
			}
		}
		Arrays.sort(A);
		boolean check = true;
		long ans = pow(2, (long)(N / 2), mod);
		for(int i = 0; i < N; i++) if(B[i] != A[i]) check = false;

		System.out.println(check ? ans : 0);

	}
}

Compiler output:
Main.java:29: error: method pow in class Main cannot be applied to given types;
		long ans = pow(2, (long)(N / 2), mod);
		           ^
  required: long,long
  found:    int,long,long
  reason: actual and formal argument lists differ in length
1 error
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for(int i=0;i<(int)(n);i++)
#define rrep(i,n) for(int i=((int)(n)-1);i>=0;i--)
#define irep(i,n,m) for(int i=(int)(n);i<(int)(m);i++)
#define all(x) (x).begin(),(x).end()
typedef long long ll;
using namespace std;
int main(){
    int n;
    cin>>n;
    vector<int> a(n);
    rep(i,n) cin>>a.at(i);
    sort(all(a));
    
    if(n%2==0){
        for(int i=0;i<n;i+=2){
            if(a.at(i)!=i+1||a.at(i+1)!=i+1){
                cout<<0<<endl;
                return 0;
            }
        }
        cout<<pow(2,n/2)<<endl;
    }
    else{
        if(a.at(0)!=0){
            cout<<0<<endl;
            return 0;
        }
        for(int i=1;i<n;i+=2){
            if(a.at(i)!=i+1||a.at(i+1)!=i+1){
                cout<<0<<endl;
                return 0;
            }
        }
        cout<<pow(2,(int)n/2)%1000000007<<endl;
    }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:35:30: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   35 |         cout<<pow(2,(int)n/2)%1000000007<<endl;
      |               ~~~~~~~~~~~~~~~^~~~~~~~~~~
      |                  |            |
      |                  |            int
      |                  __gnu_cxx::__promote<double>::__type {aka double}
Language: Java

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

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		ret = (long) Math.pow(2, (long) N / 2);
		ret = (long) ret % 1000000007;
		System.out.println(ret);

	}
}

Compiler output:
Main.java:9: error: cannot find symbol
		ret = (long) Math.pow(2, (long) N / 2);
		^
  symbol:   variable ret
  location: class Main
Main.java:10: error: cannot find symbol
		ret = (long) ret % 1000000007;
		^
  symbol:   variable ret
  location: class Main
Main.java:10: error: cannot find symbol
		ret = (long) ret % 1000000007;
		             ^
  symbol:   variable ret
  location: class Main
Main.java:11: error: cannot find symbol
		System.out.println(ret);
		                   ^
  symbol:   variable ret
  location: class Main
4 errors
Language: C++

#include <math.h>
#include <stdio.h>
#include <algorithm>
#include <cstdlib>
#include <iostream>
#include <list>
#include <numeric>
#include <queue>
#include <stack>
#include <string>
#include <vector>
using namespace std;
#define ll long long

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

  vector<int> A(N);
  int a;
  for (int i = 0; i < N; i++) {
    cin >> a;
    A.push_back(a);

    // Nが偶数の時、奇数の時で考える　**数値判定**
    if (N % 2 == 0) {
      /*
       または　偶数だったら終了/奇数だったら終了
      */
     if (a % 2 == 0) {
        cout << 0 << endl;
        return 0;
      }
    } else {
      if (a % 2 != 0) {
        cout << 0 << endl;
        return 0;
      }
    }

    // N偶数　入力値全て奇数
    // N奇数　入力値全て偶数
  }

  int count[N];
  for (int i = 0; i < N; i++) count[i] = 0;

  // Nが偶数の時/奇数の時　**数値の数の判定**
  if (N % 2 == 0) {
    for (int i = 0; i < N; i++) {
      count[A.at(i)]++;

      //同じ数が3つ以上あったら終了
      if (count[A.at(i)] > 2) {
        cout << 0 << endl;
        return 0;
      }
    }

  } else {
    for (int i = 0; i < N; i++) {
      count[A.at(i)]++;

      /* 0以外の同じ数が3つ以上あったら終了
         0が二つ以上あったら終了  */
      if (count[A.at(i)] > 2 || count[0] > 1) {
        cout << 0 << endl;
        return 0;
      }
    }
  }

  cout << pow(2, N / 2) % 100000007 << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:73:25: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   73 |   cout << pow(2, N / 2) % 100000007 << endl;
      |           ~~~~~~~~~~~~~ ^ ~~~~~~~~~
      |              |            |
      |              |            int
      |              __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

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

int main() {
 int n; cin >> n;
 vector<int> a(n),cnt(n,0);
 for(int i=0;i<n;i++){
   cin >> a[i];
 }

 for(int i=0;i<n;i++){
   cnt[a[i]]++;
 }
 bool ok=true;
 if(n%2==1){
     if(cnt[0]!=1)ok=false;
 for(int i=1;i<n;i++){
    if(i%2==1){
      if(cnt[i]!=0)ok=false;
    }
    else if(i%2==0){
      if(cnt[i]!=2)ok=false;
    }
  }
  if(ok){
    long long ans=pow(2,(n-1)/2)%1000000007;
    cout << ans << endl;
  }
  else{
    cout << '0' << endl;
  }
}

  else if(n%2==0){
    for(int i=0;i<n;i++){
      if(i%2==0){
        if(cnt[i]!=0)ok=false;
      }
      if(i%2==1){
        if(cnt[i]!=2)ok=false;
      }
    }
    if(ok){
      long long stl=pow(2,n/2)%1000000007;
      cout << stl << endl;
    }
    else{
      cout << '0' << endl;
    }
  }
 }


Compiler output:
a.cc: In function 'int main()':
a.cc:26:33: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   26 |     long long ans=pow(2,(n-1)/2)%1000000007;
      |                   ~~~~~~~~~~~~~~^~~~~~~~~~~
      |                      |           |
      |                      |           int
      |                      __gnu_cxx::__promote<double>::__type {aka double}
a.cc:44:31: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   44 |       long long stl=pow(2,n/2)%1000000007;
      |                     ~~~~~~~~~~^~~~~~~~~~~
      |                        |       |
      |                        |       int
      |                        __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll MOD = 1e9 + 7;

signed
main(){
		int N;
		cin >> N;
		vector<int> a(N), is_same(N);

		for(int i=0;i<N;i++)
				cin >> a[i];

		for(int l=0;l<=N-1;l++)
		{
				int r = (N - 1) - l;
				is_same[i] = abs(l-r);
		}

		sort(a.begin(), a.end());
		sort(is_same.begin(), is_same.end());

		bool flag = true;
		for(int i=0;i<N;i++)
		{
				if(a[i]!=is_same[i])
				{
						flag = false;
						break;
				}
		}

		if(!flag)
		{
				cout << 0 << endl;
				return 0;
		}

		//初期化
		int key = is_smae[0];
		ll cnt = 1, ans = 1;

		for(int i=1;i<N;i++)
		{
				if(key == is_same[i])
				{
						cnt++;
				}else{
						ans *= cnt;
						ans %= MOD;
						cnt = 1;
				}
		}

		cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:41: error: 'i' was not declared in this scope
   18 |                                 is_same[i] = abs(l-r);
      |                                         ^
a.cc:41:27: error: 'is_smae' was not declared in this scope; did you mean 'is_same'?
   41 |                 int key = is_smae[0];
      |                           ^~~~~~~
      |                           is_same
Language: C++

#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int main()
{
    long long int n,i,j,temp,b[100099]= {0},k,a[100099],count=0,p,x;
    scanf("%lld",&n);
    for(i=0; i<n; i++)
    {
        scanf("%lld",&a[i]);
    }
    for(i=n-1,k=0; i>=0; i--,k++)
    {
        b[k]=abs(i-k);
    }
    sort(a, a+n);
    sort(b, b+n-1);
    for(i=0; i<n; i++)
    {
        if(a[i]!=b[i])
        {
            count=1;
            break;
        }
    }
    if(count==1)
    {
        printf("0\n");
    }
    else
    {
        p=n/2;
        x=(pow(2,p))%1000000007;
        printf("%lld\n",x);
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'sort' was not declared in this scope; did you mean 'sqrt'?
   16 |     sort(a, a+n);
      |     ^~~~
      |     sqrt
a.cc:33:21: error: invalid operands of types '__gnu_cxx::__promote<double>::__type' {aka 'double'} and 'int' to binary 'operator%'
   33 |         x=(pow(2,p))%1000000007;
      |           ~~~~~~~~~~^~~~~~~~~~~
      |               |      |
      |               |      int
      |               __gnu_cxx::__promote<double>::__type {aka double}
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define vd(T) vector<vector<T>>
#define v(T) vector<T>
#define mod (ll)(1e9+7)
#define pp(T) pair<T,T>
#define pb push_back
#define mp make_pair
#define NN 100005
#define IO ios_base::sync_with_stdio(NULL),cin.tie(0),cout.tie(0)
#define loop(i,a,b) for(ll i=a;i<b;i++)
#define DEBUG cout<<"***********DEBUGGING***********"<<endl
#include <ext/pb_ds/assoc_container.hpp> // Common file 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; 
ll power(ll a,ll b){ if(b==0) return 1; ll s=power(a,b/2); s*=s;if(b&1) return s*a; return s;}
ll powermod(ll a,ll b,ll m){ if(b==0) return 1; ll s=power(a,b/2);s*=s; s%=m; if(b&1) return (s*a)%m; return s;}
inline int add(ll a,ll b,ll m=0){
    if(m==0) return a+b;
    return (a%m+b%m)%m;
}

inline int sub(ll a,ll b ,ll m=0){
    if(m==0) return a-b;
    return ((a%m-b%m)%m+m)%m;
}

inline int mul(ll a,ll b,ll m=0){
    if(m==0)return (a*b);
    return ((a%m)*(b%m))%m;
}

inline int div(ll a,ll b,ll m=0){
    if(m==0) return a/b;
    return ((a%m)*(powermod(a,b,m-2)%m))%m;
}

bool isopen(char c){
    return ((c=='(')||(c=='{')||(c=='['));
}

ll longest_balanced_parenthesis(string a,ll n){
    stack<char> s;
    ll start=0;
    ll ans=0,m=0;
    for(ll i=0;i<n;i++){
        if(isopen(a[i])){
            s.push(a[i]);
        }
        else{
            if(isopen(a[i])|| s.empty()){
                m=max(m,ans);
                continue;
            }
            else{
                s.pop();
                ans+=2;
                m=max(ans,m);
            }
        }
    }

    return m;

}

ll setup_k(ll *a,ll k){
  ordered_set x;
  // Now , insert and then check number of integers less than k by just using x.order_of_key(k+1)
}



int main() {

    IO; 
	
  	ll n;
    cin>>n;
    vector<ll> a(n+1);
    a[0]=0;
    map<ll,ll> m;
    for(ll i=0;i<n;i++){
        cin>>a[i+1];
        m[a[i+1]]++;
    }
    if(n==1){
        if(a[i]!=0){
            cout<<0<<endl;
        }
        else
            cout<<1<<endl;
        return 0;
    }
    for(ll i=1;i<=n;i++){
        if(a[i]==0){
            if(m[a[i]]>1 || (n%2==0)){
                cout<<0<<endl;
                return 0;
            }
        }
    }

    if(n%2){
        for(auto i:m){
            if(i.second==1 && (i.first!=0)){
                cout<<0<<endl;
                return 0;
            }
        }
    }

    ll cnt=0;
    cnt=m.size()-(m.count(0));

    cout<<powermod(2,cnt,mod)<<endl;
    

}

Compiler output:
a.cc: In function 'long long int setup_k(long long int*, long long int)':
a.cc:72:1: warning: no return statement in function returning non-void [-Wreturn-type]
   72 | }
      | ^
a.cc: In function 'int main()':
a.cc:90:14: error: 'i' was not declared in this scope
   90 |         if(a[i]!=0){
      |              ^
Language: C++

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

const int NUM = 1000000007;

int main() {
	int n; cin >> n;
	map<int, int> mp;
	for (int i = 0; i < n; i++) {
		int a; cin >> a;
		mp[a]++;
	}
	if (n % 2 == 0) {
		for (int i = 1; i < n; i += 2) {
			if (mp[i] != 2) {
				cout << 0 << endl;
				return 0;
			}
		}
		cout << pow(2, n / 2) << endl;
		return 0;
	}
	else {
		if (mp[0] != 1) {
			cout << 0 << endl;
			return 0;
		}
		for (int i = 2; i < n; i += 2) {
			if (mp[i] != 2) {
				cout << 0 << endl;
				return 0;
			}
		}
		cout << pow(2, (n - 1) / 2) << endl;
		return 0;
	}	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:25: error: 'pow' was not declared in this scope
   22 |                 cout << pow(2, n / 2) << endl;
      |                         ^~~
a.cc:36:25: error: 'pow' was not declared in this scope
   36 |                 cout << pow(2, (n - 1) / 2) << endl;
      |                         ^~~
Language: C++

#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <numeric>
#include <vector>
#include <set>
#include <map>
#include <cstring>
#include <unordered_map>
#define lld long long int
#define DBG1(vari1) cerr<<#vari1<<" = "<<(vari1)<<endl;
#define DBG2(vari1,vari2) cerr<<#vari1<<" = "<<(vari1)<<" "<<#vari2<<" = "<<(vari2)<<endl;
#define DBG3(vari1,vari2,vari3) cerr<<#vari1<<" = "<<(vari1)<<" "<<#vari2<<" = "<<(vari2)<<" "<<#vari3<<" = "<<(vari3)<<endl;
using namespace std;
#define MOD (ll)(1e9 + 7)
int coun[100005];
int power(int base, int exp) {
	int ans = 1;
	while(exp) {
		if(exp&1)
			ans = (ans * base) % MOD;
		base = (base * base) % MOD;
		exp /= 2;
	}
	return ans;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	// freopen("input.txt", "r", stdin);  
	int n;
	cin >> n;
	int arr[n];
	for(int i=0;i<n;i++)
	{
		cin >> arr[i];
		coun[arr[i]]++;
	}
	int flag=1;
	if(n&1)
	{
		for(int i=2;i<n;i+=2)
		{
			if(coun[i]!=2||coun[i-1]!=0)
			{
				flag=0;
				break;
			}
		}
		if(coun[0]!=1)
			flag=0;
	}
	else
	{
		for(int i=1;i<n;i+=2)
		{
			if(coun[i]!=2||coun[i+1]!=0)
			{
				flag=0;
				break;
			}
		}
		if(coun[0]!=0)
			flag=0;
	}
	if(flag)
	{
		cout << power(2,n/2);
	}
	else
		cout << "0";
}

Compiler output:
a.cc: In function 'int power(int, int)':
a.cc:16:14: error: 'll' was not declared in this scope; did you mean 'lld'?
   16 | #define MOD (ll)(1e9 + 7)
      |              ^~
a.cc:22:46: note: in expansion of macro 'MOD'
   22 |                         ans = (ans * base) % MOD;
      |                                              ^~~
a.cc:16:14: error: 'll' was not declared in this scope; did you mean 'lld'?
   16 | #define MOD (ll)(1e9 + 7)
      |              ^~
a.cc:23:40: note: in expansion of macro 'MOD'
   23 |                 base = (base * base) % MOD;
      |                                        ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    int a[n];
    long long ans=1;
    for(int i=0;i<n;i++){
      cin>>a[i];  
    }
    sort(a,a+n);
    reverse(a,a+n);
    if(n%2==0){
      for(int i=0;i<n-1;i++){
        if(i%2==0){
          if(a[i]!=a[i+1]){
            cout<<0<<endl;  
            return 0;
          }
        }
        else{
          if(a[i]!=a[i+1]+2){
              cout<<0<<endl;
              return 0;
          }
        }
      }
      while(true){
          ans=ans*2;
          n=n-2;
          if(n==0){
            ans=ans%1000000007;
           cout<<ans<<endl;
           return 0;
          }
      }
    }
    else{
      for(int i=0;i<n-1;i++){
          if(i%2==0){
          if(a[i]!=a[i+1]){
            cout<<0<<endl;  
            return 0;
          }
        }
        else{
          if(a[i]!=a[i+1]+2){
              cout<<0<<endl;
              return 0;
          }
      }
    }
    while(true){
         ans=ans*2;
          n=n-2;
          if(n==1){
            ans=ans%1000000007
           cout<<ans<<endl;
           return 0;
    }
}
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:57:31: error: expected ';' before 'cout'
   57 |             ans=ans%1000000007
      |                               ^
      |                               ;
   58 |            cout<<ans<<endl;
      |            ~~~~