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

#include <iostream>
int main(){

  int r; cin << r;
  
  cout << r * r << endl;
 
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:10: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   int r; cin << r;
      |          ^~~
      |          std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout << r * r << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 |   cout << r * r << endl;
      |                    ^~~~
      |                    std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		in.close();
		
		System.out.println(n*n);
	}
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception{
		new Main(new Scanner(System.in), System.out, System.err).exec();
	}
	public final Scanner sc;
	public final PrintStream out, err;
	public Main(final Scanner sc, final PrintStream out, final PrintStream err) {
		this.sc = sc;this.out = out;this.err = err;
	}
	static private final long pair(int a, int b) {return (((long)a) << 32) + b;}
	static private final int upper(long v) {return (int)(v >> 32);}
	static private final int lower(long v) {return (int)(v & 0xFFFFFFFF);}

	//-----------------------------------------

	static private final long load(int end, int length) {
		return pair(end, length);
	}
	static private final int end(long load) {
		return upper(load);
	}
	static private final int length(long load) {
		return lower(load);
	}
	static private final long score(int count, int last) {
		return pair(count, last);
	}
	static private final int count(long score) {
		return upper(score);
	}
	static private final int last(long score) {
		return lower(score);
	}

	//------------------------------------------

	public void exec() throws Exception{
		final int r = sc.nextInt();
		out.println(r*r);
	}
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.PrintStream;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.Scanner;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: expected unqualified-id before 'public'
    4 | public class Main {
      | ^~~~~~
Language: C++

#incllude<bits/stdc++.h>
using namespace std;
int main()
{
    long long  a,b,c,n,t,i,j;
    string s,s1;
    cin>>a;
    cout<<a*a<<"\n";



return 0;
}


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incllude; did you mean #include?
    1 | #incllude<bits/stdc++.h>
      |  ^~~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:5: error: 'string' was not declared in this scope
    6 |     string s,s1;
      |     ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | #incllude<bits/stdc++.h>
a.cc:7:5: error: 'cin' was not declared in this scope
    7 |     cin>>a;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incllude<bits/stdc++.h>
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout<<a*a<<"\n";
      |     ^~~~
a.cc:8:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <bits/stdc++.h> 
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vl;
typedef pair<ll,ll> pll;
#define vbi vector<bool> 
#define mod 1000000007
#define INF 1000000000
#define all(x) x.begin(),x.end()
#define mp make_pair
#define pb push_back
#define sd second
#define ft first
#define endl '\n'
#define cnl cout<<endl;
#define frr(i,b) for(ll i=0; i<b;i++)
#define fb(i,b) for(ll i=b-1; i>=0; i--)
#define pi  3.141592653589793238
#define MS0(X) memset((X), 0, sizeof((X)))
#define MS1(X) memset((X), -1, sizeof((X)))
#define CASET int ___T; scanf("%d", &___T); for(int cs=1;cs<=___T;cs++)
ll i,j,k;
void solve()
{
   ll cin>>t;
   ll x=pow(t,2);
   cout<<x;
}
signed main(){
  
    solve();
    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:26:10: error: expected initializer before '>>' token
   26 |    ll cin>>t;
      |          ^~
a.cc:27:13: error: 't' was not declared in this scope
   27 |    ll x=pow(t,2);
      |             ^
Language: Java

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int r = sc.nextInt();
        System.out.println(r * r);
    }
}

Compiler output:
Main.java:3: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:3: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
long long int k;
cin>>k;
cout<<k*k;

Compiler output:
a.cc:4:1: error: 'cin' does not name a type
    4 | cin>>k;
      | ^~~
a.cc:5:1: error: 'cout' does not name a type
    5 | cout<<k*k;
      | ^~~~
Language: C++

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

int main(){
	int r;
	cin >> r;
	cout << r*r << endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin >> r;
      |         ^~~
a.cc:7:9: error: 'cout' was not declared in this scope
    7 |         cout << r*r << endl;
      |         ^~~~
a.cc:7:24: error: 'endl' was not declared in this scope
    7 |         cout << r*r << endl;
      |                        ^~~~
Language: C++

#include<bits/stdc++.h>
#define rep(i, n) for(int i=0; i<n; i++)
#define MAX 100005

using namespace std;
typedef unsigned long long ull;

int main(){
  int r;
  cin >> r;
  cout << r**2 << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: invalid type argument of unary '*' (have 'int')
   11 |   cout << r**2 << endl;
      |             ^~
Language: C++

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp_practice
{
    class Program
    {
        static void Main(string[] args)
        {
            var r = int.Parse(Console.ReadLine());
            Console.WriteLine(r * r);
        }
    }
}


Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:2:7: error: expected nested-name-specifier before 'System'
    2 | using System.Collections.Generic;
      |       ^~~~~~
a.cc:3:7: error: expected nested-name-specifier before 'System'
    3 | using System.Linq;
      |       ^~~~~~
a.cc:4:7: error: expected nested-name-specifier before 'System'
    4 | using System.Text;
      |       ^~~~~~
a.cc:5:7: error: expected nested-name-specifier before 'System'
    5 | using System.Threading.Tasks;
      |       ^~~~~~
a.cc:11:26: error: 'string' has not been declared
   11 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:11:35: error: expected ',' or '...' before 'args'
   11 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:16:6: error: expected ';' after class definition
   16 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void CSharp_practice::Program::Main(int*)':
a.cc:13:13: error: 'var' was not declared in this scope
   13 |             var r = int.Parse(Console.ReadLine());
      |             ^~~
a.cc:14:13: error: 'Console' was not declared in this scope
   14 |             Console.WriteLine(r * r);
      |             ^~~~~~~
a.cc:14:31: error: 'r' was not declared in this scope
   14 |             Console.WriteLine(r * r);
      |                               ^
Language: C++

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

int main() {
  int r;
  cin >> r;
  cout << r * r
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: expected ';' before '}' token
    7 |   cout << r * r
      |                ^
      |                ;
    8 | }
      | ~
Language: Java

import java.util.Scanner;

public class ABC145A {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
		System.out.println(r*r);
	}

}


Compiler output:
Main.java:3: error: class ABC145A is public, should be declared in a file named ABC145A.java
public class ABC145A {
       ^
1 error
Language: C

#include <bits/stdc++.h>

#ifdef  DEBUG
#include "../common/inc/input.h"
#else
#define debuginput()
#endif

using namespace std;

int main() {
  debuginput();
  int a;
  a *= a;
  cout << a << endl;
}

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

#include <bits/stdc++.h> 
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vl;
typedef pair<ll,ll> pll;
#define vbi vector<bool> 
#define mod 1000000007
#define INF 1000000000
#define all(x) x.begin(),x.end()
#define mp make_pair
#define pb push_back
#define sd second
#define ft first
#define endl '\n'
#define cnl cout<<endl;
#define frr(i,b) for(ll i=0; i<b;i++)
#define fb(i,b) for(ll i=b-1; i>=0; i--)
#define pi  3.141592653589793238
#define MS0(X) memset((X), 0, sizeof((X)))
#define MS1(X) memset((X), -1, sizeof((X)))
#define CASET int ___T; scanf("%d", &___T); for(int cs=1;cs<=___T;cs++)
ll i,j,k;
void solve()
{
   ll cin>>t;
   ll x=pow(t,2);
   cout<<x;
}
signed main(){
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
     #endif
    solve();
    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:26:10: error: expected initializer before '>>' token
   26 |    ll cin>>t;
      |          ^~
a.cc:27:13: error: 't' was not declared in this scope
   27 |    ll x=pow(t,2);
      |             ^
Language: C

#include<stdio.h>

int main( void ){
    int r ;;
    scanf("%d", &r);
    printf("%d\n"r*r);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:18: error: expected ')' before 'r'
    6 |     printf("%d\n"r*r);
      |           ~      ^
      |                  )
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  ll a;
  cin>>a;
  cout<<a*a<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'll' was not declared in this scope
    5 |   ll a;
      |   ^~
a.cc:6:8: error: 'a' was not declared in this scope
    6 |   cin>>a;
      |        ^
Language: C++

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


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

    ans = r * r;
    cout << ans << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
    9 |     ans = r * r;
      |     ^~~
      |     abs
Language: C++

#Include <iostream>
using namespace std;

int main () {
  int n; cin >> n; cout << n*n << endl;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #Include; did you mean #include?
    1 | #Include <iostream>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:5:10: error: 'cin' was not declared in this scope
    5 |   int n; cin >> n; cout << n*n << endl;
      |          ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #Include <iostream>
a.cc:5:20: error: 'cout' was not declared in this scope
    5 |   int n; cin >> n; cout << n*n << endl;
      |                    ^~~~
a.cc:5:20: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:5:35: error: 'endl' was not declared in this scope
    5 |   int n; cin >> n; cout << n*n << endl;
      |                                   ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #Include <iostream>
Language: C

#include<stdio.h>
 
int main(){
   int n;
   scanf("%d", &n);
   


  	printf("%d", a*a);
	return 0;
 
}

Compiler output:
main.c: In function 'main':
main.c:9:22: error: 'a' undeclared (first use in this function)
    9 |         printf("%d", a*a);
      |                      ^
main.c:9:22: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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


int main(){
    int r;
    cin>>r;
    cout<<r**2<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: invalid type argument of unary '*' (have 'int')
    9 |     cout<<r**2<<endl;
      |             ^~
Language: C++

"include <iostream>
using namespace std;

int main(){
  int r;
  cin >> r;
  cout << r*r << endl;
}

Compiler output:
a.cc:1:1: warning: missing terminating " character
    1 | "include <iostream>
      | ^
a.cc:1:1: error: missing terminating " character
    1 | "include <iostream>
      | ^~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> r;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | "include <iostream>
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout << r*r << endl;
      |   ^~~~
a.cc:7:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:18: error: 'endl' was not declared in this scope
    7 |   cout << r*r << endl;
      |                  ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | "include <iostream>
Language: C++

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

int main(){
  int n;
  cin >> n;
  cout << n*n << endl;
}

Compiler output:
a.cc:1:1: error: extended character 　 is not valid in an identifier
    1 | ＃include　<bits/stdc++.h>
      | ^
a.cc:1:1: error: '\U0000ff03include\U00003000' does not name a type
    1 | ＃include　<bits/stdc++.h>
      | ^~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> n;
      |   ^~~
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout << n*n << endl;
      |   ^~~~
a.cc:7:18: error: 'endl' was not declared in this scope
    7 |   cout << n*n << endl;
      |                  ^~~~
Language: C

include<stdio.h>

int main(void){
  int n=0;
  scanf("%d",&n);
  printf("%d",n*n);
  return 0;
  }

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C++

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

int main( void ) {
  int r;
  cout << (int)(r*r); << endl;
  return ( 0 );
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:23: error: expected primary-expression before '<<' token
    7 |   cout << (int)(r*r); << endl;
      |                       ^~
Language: C++

//  Mayank Agarwal
//  IIIT Hyderabad



#include<bits/stdc++.h>
using namespace std;
const long long int M = 1000000007; 
#define ll long long int
#define ld double
#define pb push_back
#define mp make_pair
ll power(ll x, ll y,  ll p) 
{ 
    ll res = 1;      
    x = x % p;   
    while (y > 0) 
    { 
        if (y & 1) 
            res = (res*x) % p; 
        y = y>>1;x = (x*x) % p; 
    } return res%p; 
} 
ll modinver(ll a,ll b)
{
    return (power(a,1,M)*power(b,M-2,M))%M;
}
void SieveOfEratosthenes(int n) 
{   
    bool prime[10005]; 
    memset(prime, true, sizeof(prime)); 
  
    for (int p=2; p*p<=n; p++) 
    { 
        if (prime[p] == true) 
        { 
            for (int i=p*p; i<=n; i += p) 
                prime[i] = false; 
        } 
    } 
} 
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    ll n;
    cin>>n
    cout<<n*n<<'\n';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:11: error: expected ';' before 'cout'
   47 |     cin>>n
      |           ^
      |           ;
   48 |     cout<<n*n<<'\n';
      |     ~~~~
Language: C++

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

int main()
{
    int r;
    cin>>r;
    cout<<r*r<<endl;

}


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #nclude; did you mean #include?
    1 | #nclude<bits/stdc++.h>
      |  ^~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:7:5: error: 'cin' was not declared in this scope
    7 |     cin>>r;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #nclude<bits/stdc++.h>
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout<<r*r<<endl;
      |     ^~~~
a.cc:8:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:8:16: error: 'endl' was not declared in this scope
    8 |     cout<<r*r<<endl;
      |                ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #nclude<bits/stdc++.h>
Language: C++

import java.util.Scanner;

public class ABC145A {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int r = sc.nextInt();
		System.out.println(r*r);
	}

}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class ABC145A {
      | ^~~~~~
Language: Java


import java.util.Scanner;

public class Main

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int r = sc.nextInt();
		
		int ans = (int)Math.pow(r, 2);
		
		System.out.println(ans);
	}

}


Compiler output:
Main.java:4: error: '{' expected
public class Main
                 ^
Main.java:6: error: unnamed classes are a preview feature and are disabled by default.
	public static void main(String[] args) {
	              ^
  (use --enable-preview to enable unnamed classes)
Main.java:16: error: class, interface, enum, or record expected
}
^
3 errors
Language: C++

#include <stdio.h>

int main() {
  int a;
  scanf("%d", &a);
  print("%d\n", a * a);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'print' was not declared in this scope; did you mean 'printf'?
    6 |   print("%d\n", a * a);
      |   ^~~~~
      |   printf
Language: C++

#include<iostream>

using namspace::std;

int main(){
	int r;
  cin>>r;
  cout<<r*r;
}

Compiler output:
a.cc:3:7: error: 'namspace' has not been declared
    3 | using namspace::std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>r;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout<<r*r;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

atcoder-tools: The pre-rendered templates are not found.#include <bits/stdc++.h>
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define int long long
#define pb push_back
#define sz(i) (int)(i.size())
#define F first
#define S second
#define L long double
#define P pair<int, int>
const int inf = 0x3f3f3f3f3f3f3f3LL;
const int mod = (int)1e9 + 7;
using namespace std;
#if LOCAL
#include "../../tr.h"
#else
#define tr(...)
#define endl '\n'
#endif
template<class T> void smin(T& a, T val) {if (a > val) a = val;}template<class T> void smax(T& a, T val) {if (a < val) a = val;}
const int N = 5*(int)1e5 + 10;

int n, a[N];
int32_t main(){_

   cin >> n;

   cout<<n*n;

   return 0;
}

Compiler output:
a.cc:1:57: error: stray '#' in program
    1 | atcoder-tools: The pre-rendered templates are not found.#include <bits/stdc++.h>
      |                                                         ^
a.cc:1:1: error: 'atcoder' does not name a type
    1 | atcoder-tools: The pre-rendered templates are not found.#include <bits/stdc++.h>
      | ^~~~~~~
a.cc:23:1: error: 'int32_t' does not name a type
   23 | int32_t main(){_
      | ^~~~~~~
a.cc:1:1: note: 'int32_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
  +++ |+#include <cstdint>
    1 | atcoder-tools: The pre-rendered templates are not found.#include <bits/stdc++.h>
Language: C++

#include<bits/stdc++.h>

int main() {
    int a;
    cin >> a;
    cout << a * a << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |     cin >> a;
      |     ^~~
      |     std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |     cout << a * a << endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 |     cout << a * a << endl;
      |                      ^~~~
      |                      std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#define FOR(n) for(int i=0;i<n;i++)
#define FORJ(n) for(int j=0;j<n;j++)
#define PRN(n) printf("%d\n",n)
#define PRF(n) printf("%lf\n",n)
#define PRL(n) printf("%lld\n",n)
#define PRS(s) printf("%s\n",s)
#define PRC(c) printf("%c",c)
#define INF 10000000000
#define mod 1000000007
typedef long long int ll;
ll u(const void *a, const void *b){return *(ll*)a-*(ll*)b;}
ll d(const void *a, const void *b){return *(ll*)b-*(ll*)a;}
ll min(ll a,ll b){
  if(a>b)return b;
  return a;
}
ll max(ll a,ll b){
  if(a>b)return a;
  return b;
}
ll gcd(ll a,ll b){
  if(!b)return a;
  return gcd(b,a%b);
}
ll lcm(ll a,ll b){return a*b/gcd(a,b);}
int kt(ll a){
  int sum=0;
  while(a){
    a/=10;
    sum++;
  }
  return sum;
}
int ks(ll a){
  int sum=0;
  while(a){
    sum+=a%10;
    a/=10;
  }
  return sum;
}
ll f(ll a){
  return a*(a+1)/2;
}
int main(void){
  int a,b,ans;
  scanf("%d",&a);
  ans=a*a
  PRN(ans);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:52:10: error: expected ';' before 'printf'
   52 |   ans=a*a
      |          ^
      |          ;
Language: C++

import java.util.*;

public class Main{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
       int r=sc.nextInt();
       System.out.println(r*r);
    }
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main{
      | ^~~~~~
Language: C

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define REP(i,n) for(int i=0;i<n;i++)
#define REPP(i,n) for(int i=1;i<=n;i++)
#define ALL(obj) (obj).begin(), (obj).end()
#define EPS (1e-9)
#define INF (1e17)
#define PI (acos(-1))
//const double PI = acos(-1);
//const double EPS = 1e-15;
//long long INF=(long long)1E17;
#define i_7 (long long)(1e9+7)
//#define i_7 998'244'353
long mod(long a){
    long long c=a%i_7;
    if(c>=0)return c;
    return c+i_7;
}
using namespace std;

bool prime_(int n){
  if(n==1){
    return false;
  }else if(n==2){
    return true;
  }else{
    for(int i=2;i<=sqrt(n);i++){
      if(n%i==0){
        return false;
      }
    }
    return true;
  }
}

long long gcd_(long long a, long long b){
  if(a<b){
    swap(a,b);
  }
  if(a%b==0){
    return b;
  }else{
    return gcd_(b,a%b);
  }
}
 
long long lcm_(long long x, long long y){
  return (x/gcd_(x,y))*y;
}

int main(){
  
  int r;
  cin>>r;
  int ans = r*r;
  cout<<ans<<endl;
  return 0; 
}

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

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

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

void main() {

	int N;
	cin >> N;

	cout << N*N << endl;

	return;
}

Compiler output:
a.cc:9:1: error: '::main' must return 'int'
    9 | void main() {
      | ^~~~
a.cc: In function 'int main()':
a.cc:16:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
   16 |         return;
      |         ^~~~~~
Language: C++

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int number = Integer.parseInt(sc.next());
    System.out.println(number * number);
  }
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

/*
 *  Author : Jun_SH
 *  Solution for ABC 145 A
 */
#include<bits/stdc++.h>
#define int long long
using namespace std;
inline int read(){
    int f=1,x=0;char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
    return f*x;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    double a,b;
    cin>>a;
    cout<<a*a<<endl;
}


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

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

int main(){
  int n;
  cin>> n;
  
  cout<<r*r<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'r' was not declared in this scope
    8 |   cout<<r*r<<endl;
      |         ^
Language: C++

#include <bits/stdc++.h>
#define GET_REP(_1, _2, _3, NAME, ...) NAME
#define rep(...) GET_REP(__VA_ARGS__, irep, _rep)(__VA_ARGS__)
#define rep1(...) GET_REP(__VA_ARGS__, irep1, _rep1)(__VA_ARGS__)
#define _rep(i, n) irep (i, 0, n)
#define _rep1(i, n) irep1(i, 1, n)
#define irep(i, a, n) for (int i = a; i < (int)(n); ++i)
#define irep1(i, a, n) for (int i = a; i <= (int)(n); ++i)
#define rrep(i, n) for (int i = (int)(n) - 1; i >= 0; --i)
#define rrep1(i, n) for (int i = (int)(n); i >= 1; --i)
#define allrep(X, x) for (auto &&X : x)
#define all(x) begin(x), end(x)
#ifdef LOCAL
  #include "../../Lib/cout_container.hpp"
  #define debug(x) cout << #x " => " << (x) << endl
#else
  #define debug(x) 0
#endif
using lint = long long;
constexpr int    INF  = 1 << 28;
constexpr lint   INFL = 1LL << 60;
constexpr int    MOD  = (int)1e9 + 7;
constexpr double EPS  = 1e-9;
using namespace std;
namespace { struct INIT { INIT() { cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } INIT; }

int main(void) {
  int r;
  cin >> r;
  cout << r * r << endl;
  return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:31:12: error: expected '}' at end of input
   31 |   return 0;
      |            ^
a.cc:27:16: note: to match this '{'
   27 | int main(void) {
      |                ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a;
    cin >> a;
    cout << a^2 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
    6 |     cout << a^2 << endl;
      |               ~~^~~~~~~
Language: C++

#include<iostream>
#include<algirithm>
#include<vector>
#include<queue>
using namespace std;
typedef long long ll;
int main(){
  ll r;
  cin>>r;
  cout<<r*r<<endl;
}


Compiler output:
a.cc:2:9: fatal error: algirithm: No such file or directory
    2 | #include<algirithm>
      |         ^~~~~~~~~~~
compilation terminated.
Language: C++

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

#define endl '\n'
#define ALL(a)  (a).begin(),(a).end()
#define ALLR(a)  (a).rbegin(),(a).rend()
#define spa << " " <<
#define test cout<<"test"<<endl;
#define fi first
#define se second
#define MP make_pair
#define PB push_back
#define EB emplace_back
#define rep(i,n,m) for(ll i = (n); i < (ll)(m); i++)
#define rrep(i,n,m) for(ll i = (m) - 1; i >= (ll)(n); i--)
using ll = long long;
using ld = long double;
const ll MOD = 1e9+7;
//const ll MOD = 998244353;
const ll INF = 1e18;
using P = pair<ll, ll>;
template<typename T>
void chmin(T &a,T b){if(a>b)a=b;}
template<typename T>
void chmax(T &a,T b){if(a<b)a=b;}
void pmod(ll &a,ll b){a=(a+b)%MOD;}
void pmod(ll &a,ll b,ll c){a=(b+c)%MOD;}
void qmod(ll &a,ll b){a=(a*b)%MOD;}
void qmod(ll &a,ll b,ll c){a=(b*c)%MOD;}
ll median(ll a,ll b, ll c){return a+b+c-max({a,b,c})-min({a,b,c});}
void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}
void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}
void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}
template<typename T1,typename T2>
void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}  
template<typename T>
void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++)
{cout<<v[i][0];for(ll j=1;j<w;j++)cout spa v[i][j];cout<<endl;}};
void debug(vector<string>&v,ll h,ll w){for(ll i=0;i<h;i++)
{for(ll j=0;j<w;j++)cout<<v[i][j];cout<<endl;}};
template<typename T>
void debug(vector<T>&v,ll n){if(n!=0)cout<<v[0];
for(ll i=1;i<n;i++)cout spa v[i];cout<<endl;};
template<typename T>
vector<vector<T>>vec(ll x, ll y, T w){
  vector<vector<T>>v(x,vector<T>(y,w));return v;}
ll gcd(ll x,ll y){ll r;while(y!=0&&(r=x%y)!=0){x=y;y=r;}return y==0?x:y;}
vector<ll>dx={1,0,-1,0,1,1,-1,-1};
vector<ll>dy={0,1,0,-1,1,-1,1,-1};
template<typename T>
vector<T> make_v(size_t a,T b){return vector<T>(a,b);}
template<typename... Ts>
auto make_v(size_t a,Ts... ts){
  return vector<decltype(make_v(ts...))>(a,make_v(ts...));
}
ostream &operator<<(ostream &os, pair<ll, ll>&p){
  return os << p.first << " " << p.second;
}  
int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  //cout<<fixed<<setprecision(10);
  ll res=0,buf=0;
  bool judge = true;
  ll a,b,c,d;
  string s;
  cin>>a;
  //cin>>a>>b;
  //cin>>a>>b>>c;
  //cin>>a>>b>>c>>d;
  //cin>>s;
  cout<<r*r<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:72:9: error: 'r' was not declared in this scope
   72 |   cout<<r*r<<endl;
      |         ^
Language: C++

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

int main(){
  int N;
  string S;
  cin >> N;
  cin >> S;
  
  if (S[:N/2] == S[N/2:])
    cout << "Yes" << endl;
  else
    count << "No" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: expected primary-expression before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |         ^
a.cc:10:9: error: expected ']' before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |         ^
      |         ]
a.cc:10:9: error: expected ')' before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |      ~  ^
      |         )
a.cc:10:13: error: expected primary-expression before ']' token
   10 |   if (S[:N/2] == S[N/2:])
      |             ^
a.cc:13:11: error: invalid operands of types '<unresolved overloaded function type>' and 'const char [3]' to binary 'operator<<'
   13 |     count << "No" << endl;
      |     ~~~~~~^~~~~~~
Language: C++

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

int main(){
  int N;
  string S;
  cin >> N;
  cin >> S;
  
  if (S[:N/2] == S[N/2:])
    cout << "Yes" << endl;
  else
    count << "No" << endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'string' was not declared in this scope
    6 |   string S;
      |   ^~~~~~
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin >> N;
      |   ^~~
a.cc:8:10: error: 'S' was not declared in this scope
    8 |   cin >> S;
      |          ^
a.cc:10:9: error: expected primary-expression before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |         ^
a.cc:10:9: error: expected ']' before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |         ^
      |         ]
a.cc:10:9: error: expected ')' before ':' token
   10 |   if (S[:N/2] == S[N/2:])
      |      ~  ^
      |         )
a.cc:10:13: error: expected primary-expression before ']' token
   10 |   if (S[:N/2] == S[N/2:])
      |             ^
a.cc:13:5: error: 'count' was not declared in this scope
   13 |     count << "No" << endl;
      |     ^~~~~
a.cc:13:22: error: 'endl' was not declared in this scope
   13 |     count << "No" << endl;
      |                      ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main ()
{
    int n,j;
    char s[100];
    char a[100];
    char b[100];
    scanf("%d",&n);
    scanf(" %[^\n]",s);
    j=n/2;
    strncpy(a,s,j);
    a[j]='\0';
    strrev(s);
    strncpy(b,s,j);
    strrev(b);
    if(strcmp(a,b)==0)
    {
        printf("Yes");
    }
    else
        printf("No");
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'strrev' was not declared in this scope; did you mean 'strsep'?
   14 |     strrev(s);
      |     ^~~~~~
      |     strsep
Language: C++

#include<stdio.h>
#include<string.h>
int main ()
{
    int n,j,i;
    char s[100];
    char a[100];
    char b[100];
    scanf("%d",&n);
    scanf(" %[^\n]",s);
    j=n/2;
    strncpy(a,s,j);
    a[j]='\0';
    strrev(s);
    strncpy(b,s,j);
    strrev(b);
    if(strcmp(a,b)==0)
    {
        printf("Yes");
    }
    else
        printf("No");
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'strrev' was not declared in this scope; did you mean 'strsep'?
   14 |     strrev(s);
      |     ^~~~~~
      |     strsep
Language: C

#include<stdio.h>
#include<string.h>
int main ()
{
    int n,j,i;
    char s[100];
    char a[100];
    char b[100];
    scanf("%d",&n);
    scanf(" %[^\n]",s);
    j=n/2;
    strncpy(a,s,j);
    a[j]='\0';
    strrev(s);
    strncpy(b,s,j);
    strrev(b);
    if(strcmp(a,b)==0)
    {
        printf("Yes");
    }
    else
        printf("No");
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:14:5: error: implicit declaration of function 'strrev'; did you mean 'strsep'? [-Wimplicit-function-declaration]
   14 |     strrev(s);
      |     ^~~~~~
      |     strsep
Language: C

#include<stdio.h>
#include<string.h>
#include<string>
int main ()
{
    int n,j,i;
    char s[100];
    char a[100];
    char b[100];
    scanf("%d",&n);
    scanf(" %[^\n]",s);
    j=n/2;
    strncpy(a,s,j);
    a[j]='\0';
    strrev(s);
    strncpy(b,s,j);
    strrev(b);
    if(strcmp(a,b)==0)
    {
        printf("Yes");
    }
    else
        printf("No");
    return 0;
}


Compiler output:
main.c:3:9: fatal error: string: No such file or directory
    3 | #include<string>
      |         ^~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h> using namespace std; int main() { int N,i,j,l,m,flag=0; string S; cin>>N; cin>>S; l=S.size();m=(l/2); if(l%2!=0) cout<<"No"<<endl; else { for(i=0,j=m;i<m,j<l ;i++,j++) { if(S[i]!=S[j]) flag=1;} if(flag==1) cout<<"No"<<endl; else if(flag==0) cout<<"Yes"<<endl;}return 0;}

Compiler output:
a.cc:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std; int main() { int N,i,j,l,m,flag=0; string S; cin>>N; cin>>S; l=S.size();m=(l/2); if(l%2!=0) cout<<"No"<<endl; else { for(i=0,j=m;i<m,j<l ;i++,j++) { if(S[i]!=S[j]) flag=1;} if(flag==1) cout<<"No"<<endl; else if(flag==0) cout<<"Yes"<<endl;}return 0;}
      |                         ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

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

using namespace std;
using p=pair<int,int>;
typedef long long ll;

int main() {
  int n;
  cin >>n;
  string s;
  cin >> s;
  if(n%2==1){
    cout << "No" << endl;
    return 0;
  }
  int g=n/2;
  rep(i,g){
    if(a[i]!=a[i+g]){
      cout << "No" << endl;
      return 0;
    }
  }
  cout << "Yes" << endl;
  

  return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:8: error: 'a' was not declared in this scope
   19 |     if(a[i]!=a[i+g]){
      |        ^
Language: C++

#include<iostream>
#include<stdio.h>
using namespace std;
using ll=long long;
#include<algorithm>
#include<set>
#include<vector>
#define rep(i,n) for(int i=0;i<(n);i++)
using P=pair<int,int>;

//auto

int main(){
int n;
string s,t;
cin>>n>>s;
t=2*s.substr(0,n/2);
if(t==s)cout<<"Yes"<<endl;
else cout<<"No"<<endl;
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:17:4: error: no match for 'operator*' (operand types are 'int' and 'std::__cxx11::basic_string<char>')
   17 | t=2*s.substr(0,n/2);
      |   ~^~~~~~~~~~~~~~~~
      |   |         |
      |   int       std::__cxx11::basic_string<char>
Language: C++

N = int(input())
S = input()
if N % 2 !=0:
    print('No')
else:
   n = int(N/2)  
   s1 = S[:n]
   s2 = S[n:]
   if s1 == s2:
       print('Yes')
   else:
       print('No')

Compiler output:
a.cc:4:11: warning: multi-character character constant [-Wmultichar]
    4 |     print('No')
      |           ^~~~
a.cc:10:14: warning: multi-character character constant [-Wmultichar]
   10 |        print('Yes')
      |              ^~~~~
a.cc:12:14: warning: multi-character character constant [-Wmultichar]
   12 |        print('No')
      |              ^~~~
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

#include <iostream>
#include <algorithm>
#include <bitset>
#include <tuple>
#include <cstdint>
#include <cstdio>
#include <cctype>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <cassert>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <limits>
#include <map>
#include <memory>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <math.h>
#define int long long
using namespace std;
signed main() {
    int N;
    string S;
    cin>>N>>S;
    int count=0;
    if(N==1){
        cout<<"Yes"<<endl;
    }
    for(int i=0;i<N/2;i++){
        if(S[i]==S[i+N/2]){
            count++;
        }
    }
    else if(count==N/2){
        cout<<"Yes"<<endl;
    }
    else{
        cout<<"No"<<endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:52:5: error: 'else' without a previous 'if'
   52 |     else if(count==N/2){
      |     ^~~~
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <math.h>
#include <queue>

using namespace std;
using ll = long long;

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

	if (S.size() % 2 != 0) {
		cout << "No" << endl;
		return;
	}

	int i;
	for (i = 1; i < N; ++i) {
		if (S[i] == S[0]) {
			break;
		}
	}

	string T = S.substr(0, i);
	if (S == T + T) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:17: error: return-statement with no value, in function returning 'int' [-fpermissive]
   18 |                 return;
      |                 ^~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int n;
  cin>>n;
  string s,s1,s2;
  cin>>s;
  for(int i=0;i<n/2;i++)
  {
    s1[i]=s[i];
  }
  for(int i=n/2;i<n;i++)
  {
    s2[i]=s[i];
  }
  if(n==1)
    cout<<"No"<<endl;
  else if(s1==s2)
    cout<<"Yes"<<endl;
  else
    cout<<"No"<<endl;
}

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

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

int main(){
  int n;string s;
  cin >> n >> s;
  bool b=1;
  if(n%2==1) b=0;
  else{
    string a=s.substr(0,n/2),b=s.substr(n/2,n/2);
    if(a!=b) b=0;
  }
  if(b) cout << "Yes" << endl;
  else cout << "No" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: ambiguous overload for 'operator=' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and 'int')
   11 |     if(a!=b) b=0;
      |                ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:817:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  817 |       operator=(const basic_string& __str)
      |       ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:828:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(const _CharT*) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  828 |       operator=(const _CharT* __s)
      |       ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:840:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  840 |       operator=(_CharT __c)
      |       ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:858:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>& std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::operator=(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
  858 |       operator=(basic_string&& __str)
      |       ^~~~~~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i,N) for (int i = 0; i < (N); ++i)
#define all(v) v.begin(), v.end()
using namespace std;
using ll = long long;
using P = pair<int, int>;
int main(void){
  int N;
  string S;
  cin >> N >> S;

  string ans = "Yes";
  if (S.size() % 2 == 1) cout << "No" << endl;
  else{
    for(int i = 0; i <= N / 2 - 1; i++){
      if (S.at(i) != S.at(i + N / 2)){
        ans = "No";
        break;
    }
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:7:15: note: to match this '{'
    7 | int main(void){
      |               ^
Language: Java

import java.util.*;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    String S = sc.next();
    boolean answer = false();
    if(N%2==0){
      for(int i = 0;i<N%2,i++){
        if((S.charAt(i).equals(S.charAt(i+N)){
          if(i==N-1){
            answer = true;
          }
        }else{
          break;
        }
      }
    }
    if(answer){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}

Compiler output:
Main.java:8: error: ';' expected
    boolean answer = false();
                          ^
Main.java:10: error: ';' expected
      for(int i = 0;i<N%2,i++){
                         ^
Main.java:11: error: ')' expected
        if((S.charAt(i).equals(S.charAt(i+N)){
                                             ^
3 errors
Language: C++

#include <stdio.h>

int main() {
int aa;
char bb[aa];
scanf("%d %s", &aa, bb);
if (aa%2 != 0){
    printf("No");
    return 0;
}
for(int j=0; j<aa/2; j++){
    if(bb[i] != bb[aa / 2 +i]){
        printf("No");
        return 0;
    }
}
printf("Yes");



    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: 'i' was not declared in this scope
   12 |     if(bb[i] != bb[aa / 2 +i]){
      |           ^
Language: C

#include <stdio.h>
#include <string.h>

int main() {
	
	int n;
	
	scanf("%d", &n);
	
	char s[n];
	
	scanf("%s", s);
	
	char t1[n]={0};
	char t2[n]={0};
	
	if(n%2==1){
		printf("No\n");
	}
	
	else if(n%2==0){
		for(int i=0; i<n/2; i++){
			t1[i] = s[i];
			t2[i] = s[i+(n/2)];
		}
			
		if(strcmp(t1, t2)==0){
			printf("Yes\n");
		}
		
		else{
			printf("No\n");
		}
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:14:20: error: variable-sized object may not be initialized except with an empty initializer
   14 |         char t1[n]={0};
      |                    ^
main.c:15:20: error: variable-sized object may not be initialized except with an empty initializer
   15 |         char t2[n]={0};
      |                    ^
Language: C

#include <stdio.h>
#include <string.h>

int main() {
	
	int n;
	
	scanf("%d", &n);
	
	char s[n];
	
	scanf("%s", s);
	
	if(n%2==1){
		printf("No\n");
	}
	
	else if(n%2==0){
		char t1[n]={0};
		char t2[n]={0};
		for(int i=0; i<n/2; i++){
			t1[i] = s[i];
			t2[i] = s[i+(n/2)];
		}
			
		if(strcmp(t1, t2)==0){
			printf("Yes\n");
		}
		
		else{
			printf("No\n");
		}
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:19:28: error: variable-sized object may not be initialized except with an empty initializer
   19 |                 char t1[n]={0};
      |                            ^
main.c:20:28: error: variable-sized object may not be initialized except with an empty initializer
   20 |                 char t2[n]={0};
      |                            ^