criyle/codenet-compile-errors huggingface dataset:
Language: Java

import java.util.Scanner;
import java.util.ArrayList;

public class App
  {
    public static void main(String[] args)
    {
        String[] lines = getStdin();

        String[] inputs = lines[0].split(" ");
        int x = Integer.parseInt(inputs[0]);
        int y = Integer.parseInt(inputs[1]);

        System.out.println(x*y);
    }

    private static String[] getStdin() {
        Scanner scanner = new Scanner(System.in);
        ArrayList<String> lines = new ArrayList<>();
        while (scanner.hasNext()) {
            lines.add(scanner.nextLine());
        }
        return lines.toArray(new String[lines.size()]);
    }

}

Compiler output:
Main.java:4: error: class App is public, should be declared in a file named App.java
public class App
       ^
1 error
Language: C++

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<math.h>
#include<bits/stdc++.h>
#include<stack>
#include<queue>
#include<list>
#include<vector>
#include<bitset>
#include<unordered_map> 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// #include "boost/algorithm/string.hpp"
#define fio ios_base::sync_with_stdio(false)
#define mod 998244353
#define mod1 mod
#define mod2 1000000007
#define li long long int
#define ll long long int
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define readi(x) scanf("%d",&x)
#define  reads(x)  scanf("%s", x)
#define readl(x) scanf("%I64d",&x)
#define rep(i,n) for(i=0;i<n;i++)
#define revp(i,n) for(i=(n-1);i>=0;i--)
#define myrep1(i,a,b) for(i=a;i<=b;i++)
#define myrep2(i,a,b) for(i=b;i>=a;i--)
#define pb push_back
#define mp make_pair
#define fi first
#define sec second
#define MAXN 1000000000010000005
#define MINN -1000000000000000000
#define INTMAX 1000001000
#define pii pair<ll,ll> 
#define pdd pair<double,double>
#define pic pair<int,char>
#define N 500005
#define lgn 20
#define ddouble long double
#define minus minu
#define PI 2*acos(0)
#define lgn 20
 
 
// #define INTMAX 200000000 
 
// using namespace boost;
// #define si short int
 
using namespace std;
using namespace __gnu_pbds;             
typedef priority_queue<pii, vector<pii > > max_pq;
typedef priority_queue<pii, vector<pii> , greater<pii>  > min_pq;
ll toint(const string &s) {stringstream ss; ss << s; ll x; ss >> x; return x;}
string tostring ( ll number ){stringstream ss; ss<< number; return ss.str();}
 
// using namespace __gnu_pbds;         
// typedef priority_queue<pair<ll,char> , vector<pair<ll , char> > > max_pq;
// typedef priority_queue<pii , vector<pii > ,greater<pii > > min_pq;
typedef tree<pair<string,string> , null_type, less<pair<string,string> >, rb_tree_tag, tree_order_statistics_node_update> OST;
// typedef priority_queue<pair < ll , pair < pii , ll > >  , vector<pair < ll , pair < pii , ll > >  > ,greater<pair < ll , pair < pii , ll > >  > > min_pq;
#define TRACE
#ifdef TRACE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
    template <typename Arg1>
    void __f(const char* name, Arg1&& arg1){
        cout << name << " : " << arg1 << std::endl;
        //use cerr if u want to display at the bottom
    }
    template <typename Arg1, typename... Args>
    void __f(const char* names, Arg1&& arg1, Args&&... args){
        const char* comma = strchr(names + 1, ','); cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
    }
#else
#define trace(...)
#endif
#define nn 2000005
ll n;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #endif
    ll a,b;
	cin >> a >> >b;
	cout << a*b;
        
}

Compiler output:
a.cc: In function 'int main()':
a.cc:92:21: error: expected primary-expression before '>' token
   92 |         cin >> a >> >b;
      |                     ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(register int i=(a);i<=(b);++i)
#define All(x) (x).begin(),(x).end()
#define pb emplace_back
#define mp make_pair
typedef long long ll;
typedef vector<int> VI;
typedef pair<int,int> PII;
const double PI=acos(-1.0);
const double eps=1e-6;
const long long mod=1e9+7;
const int inf=0x7fffffff;
const int maxn=100005;
ll qpow(ll x,ll y,ll Mod) {ll ans=1,base=x%Mod; while(y){if(y&1)ans=(ans*base)%Mod;base=(base*base)%Mod;y>>=1;} return ans;}
ll gcd(ll a,ll b) {return b?gcd(b,a%b):a;}
// fast read
template<class T> void read(T &x) {
	x=0;int f=0;char ch=getchar();
	while(ch<'0'||ch>'9'){f|=(ch=='-');ch=getchar();}
	while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}
	x=f?-x:x;
	return;
}

int n,a[maxn],a,b;

int main(){
	//freopen("test.in","r",stdin);
	sacnf("%d%d",&a,&b);
	printf("%d\n",a*b);
	return 0;
}

Compiler output:
a.cc:26:15: error: conflicting declaration 'int a'
   26 | int n,a[maxn],a,b;
      |               ^
a.cc:26:7: note: previous declaration as 'int a [100005]'
   26 | int n,a[maxn],a,b;
      |       ^
a.cc: In function 'int main()':
a.cc:30:9: error: 'sacnf' was not declared in this scope; did you mean 'scanf'?
   30 |         sacnf("%d%d",&a,&b);
      |         ^~~~~
      |         scanf
a.cc:31:24: error: invalid operands of types 'int [100005]' and 'int' to binary 'operator*'
   31 |         printf("%d\n",a*b);
      |                       ~^~
      |                       | |
      |                       | int
      |                       int [100005]
Language: C++

#include <iostream>

int main(int argc, char const *argv[]) {
    int a, b;

    cin >> a >> b;

    cout << a*b <<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:6:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |     cin >> a >> b;
      |     ^~~
      |     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:8:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |     cout << a*b <<endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |     cout << a*b <<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++

#include<iostream>
#usingnamespace std

int main(){
	int A,B;
  cin >> A >> B;
  cout << A*B << endl;
  return 0;
}


Compiler output:
a.cc:2:2: error: invalid preprocessing directive #usingnamespace
    2 | #usingnamespace std
      |  ^~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> A >> B;
      |   ^~~
      |   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:7:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   cout << A*B << 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:7:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   cout << A*B << 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: Java

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

public class Atcoder {
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        // int test = Integer.parseInt(br.readLine());

        // while(test-->0) {
            
            String temp[] = br.readLine().split(" ");
            int a=  Integer.parseInt(temp[0]);
            int b = Integer.parseInt(temp[1]);
            System.out.println(a*b);

        // }

    }
}

Compiler output:
Main.java:4: error: class Atcoder is public, should be declared in a file named Atcoder.java
public class Atcoder {
       ^
1 error
Language: C++

#include<iostream>
using namespace std;
int main()
{
  cin>>a>>b;
  cout<<a*b;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:8: error: 'a' was not declared in this scope
    5 |   cin>>a>>b;
      |        ^
a.cc:5:11: error: 'b' was not declared in this scope
    5 |   cin>>a>>b;
      |           ^
Language: C

#include <iostream>
#include <vector>
#include <math.h>
#include <algorithm>
#include <string>
#include <map>
#include <iomanip>
#define rep(i,N) for(int i=0; i<N;i++)
using namespace std;

int main(){
    int A,B;
    cin >>A>>B;
    cout <<A*B<<endl;
    return 0;
}

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

import java.io.*;
public class Main{
	public static void main(String args[]) throws IOException{
     	BufferedReader in=new BufferedReader(new InputStreamreader(System.in));
      	StringTokenizer st=new StringTokenizer(in.readLine());
      	int a=Integer.parseInt(st.nextToken());
      	int b=Integer.parseInt(st.nextToken());
      	System.out.println(a*b);
    }
}

Compiler output:
Main.java:4: error: cannot find symbol
     	BufferedReader in=new BufferedReader(new InputStreamreader(System.in));
     	                                         ^
  symbol:   class InputStreamreader
  location: class Main
Main.java:5: error: cannot find symbol
      	StringTokenizer st=new StringTokenizer(in.readLine());
      	^
  symbol:   class StringTokenizer
  location: class Main
Main.java:5: error: cannot find symbol
      	StringTokenizer st=new StringTokenizer(in.readLine());
      	                       ^
  symbol:   class StringTokenizer
  location: class Main
3 errors
Language: Java

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

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 <stdio.h>  
#include <string.h>  
#include <math.h> 
int main()
{
   int a,b;
   cin>>a>>b;
   cout<<a*b; 
  
   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:4: error: 'cin' was not declared in this scope; did you mean 'sin'?
    7 |    cin>>a>>b;
      |    ^~~
      |    sin
a.cc:8:4: error: 'cout' was not declared in this scope
    8 |    cout<<a*b;
      |    ^~~~
Language: C++

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

int main() {
   cin << A << B;
   
   int Answer;
   Answer = A * B;
  
  cout << Answer << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:11: error: 'A' was not declared in this scope
    5 |    cin << A << B;
      |           ^
a.cc:5:16: error: 'B' was not declared in this scope
    5 |    cin << A << B;
      |                ^
Language: Java

import java.util.Scanner;

class Multiplication1 {
    public static void main(String args[]) throws Exception {
        Scanner s = new Scanner(System.in);
        int a = s.nextInt();
        int b = s.nextInt();
        int c = a*b;
      System.out.println(""+c)
    }
}

Compiler output:
Main.java:9: error: ';' expected
      System.out.println(""+c)
                              ^
1 error
Language: C++

#include <iostream>


int main(void){
    //std::cout << "hello world" << std::endl;

    int a, b;
    std::cin >> a >> b;
    std::cout << a*b << " " << s << std::endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:32: error: 's' was not declared in this scope
    9 |     std::cout << a*b << " " << s << std::endl;
      |                                ^
Language: C++

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

int main()
{
  ll a, b, c;
  cin >> a >> b;
  c = a*b;
  cout << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'll' was not declared in this scope
    6 |   ll a, b, c;
      |   ^~
a.cc:7:10: error: 'a' was not declared in this scope
    7 |   cin >> a >> b;
      |          ^
a.cc:7:15: error: 'b' was not declared in this scope
    7 |   cin >> a >> b;
      |               ^
a.cc:8:3: error: 'c' was not declared in this scope
    8 |   c = a*b;
      |   ^
Language: C++

#include <iostream>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:16: error: 'A' was not declared in this scope
    6 |         cin >> A >> B;
      |                ^
a.cc:6:21: error: 'B' was not declared in this scope
    6 |         cin >> A >> B;
      |                     ^
Language: C++

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<math.h>
#include<bits/stdc++.h>
#include<stack>
#include<queue>
#include<list>
#include<vector>
#include<bitset>
#include<unordered_map> 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// #include "boost/algorithm/string.hpp"
#define fio ios_base::sync_with_stdio(false)
#define mod 998244353
#define mod1 mod
#define mod2 1000000007
#define li long long int
#define ll long long int
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define readi(x) scanf("%d",&x)
#define  reads(x)  scanf("%s", x)
#define readl(x) scanf("%I64d",&x)
#define rep(i,n) for(i=0;i<n;i++)
#define revp(i,n) for(i=(n-1);i>=0;i--)
#define myrep1(i,a,b) for(i=a;i<=b;i++)
#define myrep2(i,a,b) for(i=b;i>=a;i--)
#define pb push_back
#define mp make_pair
#define fi first
#define sec second
#define MAXN 1000000000010000005
#define MINN -1000000000000000000
#define INTMAX 1000001000
#define pii pair<ll,ll> 
#define pdd pair<double,double>
#define pic pair<int,char>
#define N 500005
#define lgn 20
#define ddouble long double
#define minus minu
#define PI 2*acos(0)
#define lgn 20
 
 
// #define INTMAX 200000000 
 
// using namespace boost;
// #define si short int
 
using namespace std;
ll n;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #endif
    ll a,b;
	cin >> a >> >b;
	cout << a*b;
        
}

Compiler output:
a.cc: In function 'int main()':
a.cc:65:21: error: expected primary-expression before '>' token
   65 |         cin >> a >> >b;
      |                     ^
Language: C++

#include<iostream>
using namespace std;
int main(){
	 int n,m;
  	cin>>n>>m;
  cout<<n*m<<endl
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:18: error: expected ';' before '}' token
    6 |   cout<<n*m<<endl
      |                  ^
      |                  ;
    7 | }
      | ~
Language: C

#include <stdio.h>

int main()
{
  int a,b,ans;
  
  scanf("%d %d", &a, &b);
  ans = a * b;
  prinf("%d", ans);
  
  return(0);
}

Compiler output:
main.c: In function 'main':
main.c:9:3: error: implicit declaration of function 'prinf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    9 |   prinf("%d", ans);
      |   ^~~~~
      |   printf
Language: C

#include <bits/stdc++.h>
using namespace std;
long long a,b;
int main () {
	scanf("%lld%lld",&a,&b);
	printf("%lld\n",a*b);
	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 <string>
#include <algorithm>
#include <functional>
using namespace std;

#include <math.h>
#include <iomanip>
#include <vector>
#include <queue>
using Graph = vector<vector<int>>;
const double PI = 3.14159265358979323846;

long long modpow(long long a, long long n, long long mod) {
	long long res = 1;
	while (n > 0) {
		if (n & 1) res = res * a % mod;
		a = a * a % mod;
		n >>= 1;
	}
	return res;
}

int main() {

	int A, B, ans;

	cin >> A >> B;

	ans = A*B;

	cout << ans << endl;

	cin >> total;

	return 0;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:16: error: 'total' was not declared in this scope
   34 |         cin >> total;
      |                ^~~~~
Language: C++

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

int main(){
  int x,y;
  cin>>x>>y;
  res = x*y;
  cout<<res<<endl;
  return 0;
}

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

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String A = sc.next();
        String B = sc.next();
        sc.close();
        System.out.println(A*B);
    }
}

Compiler output:
Main.java:9: error: bad operand types for binary operator '*'
        System.out.println(A*B);
                            ^
  first type:  String
  second type: String
1 error
Language: C++

#include <cstdio>
#include <algorithm>
using namespace std;
typedef long long ll;

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



Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'cin' was not declared in this scope
    9 |     cin>>a>>b;
      |     ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include <algorithm>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:10:5: error: 'cout' was not declared in this scope
   10 |     cout<<a*b<<endl;
      |     ^~~~
a.cc:10:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:16: error: 'endl' was not declared in this scope
   10 |     cout<<a*b<<endl;
      |                ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include <algorithm>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C

#include<stdio.h>
int main()
{
        int a=0,b=0;

        scanf("%d%d",&a,&b);
        printf("%d",a*b);

        return 0;
};
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
~                                                                               
                                                              5,0-1        全て


Compiler output:
main.c:11:1: error: expected identifier or '(' before '~' token
   11 | ~
      | ^
Language: C++

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

int main(){
  int A,B;
  cin >> A >> B;
  cout << A*B;
  return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
#define FOR(i,n) for(int i=0;i<n;i++)
#define For(i,m,n) for(int i=m;i<n;i++)
#define ll long long
#define l long
#define all(x) x.begin(),x.end()
#define pb push_back
#define len(x) x.len
int main()
{

ll n,m;
cin>>n>>m;
cout<<n*m



return 0;}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:10: error: expected ';' before 'return'
   15 | cout<<n*m
      |          ^
      |          ;
......
   19 | return 0;}
      | ~~~~~~
Language: Java

public class ProblemA {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int a = in.nextInt();
		int b = in.nextInt();
		System.out.println(a*b);

	}
}

Compiler output:
Main.java:1: error: class ProblemA is public, should be declared in a file named ProblemA.java
public class ProblemA {
       ^
Main.java:5: error: cannot find symbol
		Scanner in = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class ProblemA
Main.java:5: error: cannot find symbol
		Scanner in = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class ProblemA
3 errors
Language: C++

#inlcude<iostream>
typedef unsingned long long int ulli;
int main()
{
  ulli a,b;
  cin>>a>>b;
  cout<<a*b;
  return 0;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inlcude; did you mean #include?
    1 | #inlcude<iostream>
      |  ^~~~~~~
      |  include
a.cc:2:9: error: 'unsingned' does not name a type; did you mean 'unsigned'?
    2 | typedef unsingned long long int ulli;
      |         ^~~~~~~~~
      |         unsigned
a.cc: In function 'int main()':
a.cc:5:3: error: 'ulli' was not declared in this scope
    5 |   ulli a,b;
      |   ^~~~
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>a>>b;
      |   ^~~
a.cc:6:8: error: 'a' was not declared in this scope
    6 |   cin>>a>>b;
      |        ^
a.cc:6:11: error: 'b' was not declared in this scope
    6 |   cin>>a>>b;
      |           ^
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout<<a*b;
      |   ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected initializer before 'B'
    5 |   int A B;
      |         ^
a.cc:6:10: error: 'A' was not declared in this scope
    6 |   cin >> A >> B;
      |          ^
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B;
      |               ^
Language: C

#include <stdio.h>

int main(void) {
	int a,b;
	scanf(%d%d,&a,&b);
	printf(%d,a*b);
	return 0;
}



Compiler output:
main.c: In function 'main':
main.c:5:15: error: expected expression before '%' token
    5 |         scanf(%d%d,&a,&b);
      |               ^
main.c:6:16: error: expected expression before '%' token
    6 |         printf(%d,a*b);
      |                ^
Language: C

#include <stdio.h>

int main(void){
  int i,a,b;

  scanf("%d,&a");
  scanf("%d.&b");

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

Compiler output:
main.c: In function 'main':
main.c:9:3: error: implicit declaration of function 'prinf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    9 |   prinf("%d",a*b);
      |   ^~~~~
      |   printf
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  	long long N,M;
  cin>>N>>M;
  ll ans = N*M;
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'll' was not declared in this scope
    7 |   ll ans = N*M;
      |   ^~
a.cc:8:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
    8 |   cout<<ans<<endl;
      |         ^~~
      |         abs
Language: C++

#include <bits/stdc++.h>

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


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin >> a >> b;
      |   ^~~
      |   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:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout << a * b << 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 << a * b << 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 <iostream>
usigna namespace std;

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

Compiler output:
a.cc:2:1: error: 'usigna' does not name a type; did you mean 'unsigned'?
    2 | usigna namespace std;
      | ^~~~~~
      | unsigned
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> a >> b;
      |   ^~~
      |   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 << a * b << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout << a * b << 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

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

int main(void) {
  int a, b;
  cin >> a >> b;
  cout << a * b << 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: Java

mport java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();

    System.out.println(a*b);

  }
}


Compiler output:
Main.java:1: error: class, interface, enum, or record expected
mport java.util.*;
^
1 error
Language: C++

#include <iodstream>

int main(int argc, char const *argv[]) {
    int a, b;

    cin >> a >> b;

    cout << a*b <<endl;
    return 0;
}


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

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

int main(){
  long long a,b;
  cin >> a >> b
  cout << a*b;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:16: error: expected ';' before 'cout'
    6 |   cin >> a >> b
      |                ^
      |                ;
    7 |   cout << a*b;
      |   ~~~~
Language: Java

import java.util.Scanner;

public class Main {

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

	}

}


Compiler output:
Main.java:14: error: class, interface, enum, or record expected
}
^
1 error
Language: C

#include <stdio.h>

int main(void)
{
 int a,b;
  
  sccanf("%d%d", &a,&b);
  
  printf("%d", a*b);
  
  return 0;
  
}

Compiler output:
main.c: In function 'main':
main.c:7:3: error: implicit declaration of function 'sccanf'; did you mean 'sscanf'? [-Wimplicit-function-declaration]
    7 |   sccanf("%d%d", &a,&b);
      |   ^~~~~~
      |   sscanf
Language: C++

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

int main(){

int a,b;
cin a>>b;
int c = a*b;

cout << c << endl;


  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:4: error: expected ';' before 'a'
    7 | cin a>>b;
      |    ^~
      |    ;
Language: C++

#include <bits/stdc++.h>
#define endl "\n"
using namespace std;

#define ll long long
const long long llINF = 1LL << 60;
const int iINF = 0x20000000;
template<class T> inline bool chmin(T& a, T b) { if (b < a) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }

void execute();
int main() 
{
    cin.tie(nullptr);
    ios::sync_with_stdio(false);// cin と scanfの併用禁止
    cout << fixed << setprecision(15);
    execute();
    return 0;
}ac


void execute()
{
    int A, B;
    cin >> A >> B;

    cout << A * B << endl; 
}


Compiler output:
a.cc:19:2: error: 'ac' does not name a type
   19 | }ac
      |  ^~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:23: error: expected '}' at end of input
    8 |   cout << a*b << endl;
      |                       ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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


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




Compiler output:
a.cc:12:5: error: expected unqualified-id before 'return'
   12 |     return 0;
      |     ^~~~~~
a.cc:13:1: error: expected declaration before '}' token
   13 | }
      | ^
Language: C++

#include<bits/stdc++.h>

using namespace std;

int mian(){
	int a,b;
	cin>>a>>b;
	cout<<a*b;
	return 0;
}

Compiler output:
/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>
using namespace std;
int main(){
  int x, y;
  cout << x*y <, 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:5:3: error: 'cout' was not declared in this scope
    5 |   cout << x*y <, endl;
      |   ^~~~
a.cc:5:16: error: expected primary-expression before ',' token
    5 |   cout << x*y <, endl;
      |                ^
a.cc:5:18: error: 'endl' was not declared in this scope
    5 |   cout << x*y <, endl;
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
#include <stdio.h>
typedef long long int LL;
#define fr(i,p,n) for(LL i=p;i<n;i++)
#define fr1(i,p,n) for(LL i=p;i>=n;i--)
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define all(v) v.begin(),v.end()
#define PI 3.14159265358979323846
#define MOD 1000000007
#define MOD1 998244353
#define INF 1e18
#define precise cout << std::setprecision(10) << std::fixed;

using namespace std;
 
int main()
{
        LL a,b ans;
        cin>>a>>b;
        ans=a*b;
        cout<<ans<<endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:16: error: expected initializer before 'ans'
   21 |         LL a,b ans;
      |                ^~~
a.cc:22:17: error: 'b' was not declared in this scope
   22 |         cin>>a>>b;
      |                 ^
a.cc:23:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   23 |         ans=a*b;
      |         ^~~
      |         abs
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  int A,B
  cin >> A >> B;
  cout << A*B << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: expected initializer before 'cin'
    6 |   cin >> A >> B;
      |   ^~~
a.cc:7:13: error: 'B' was not declared in this scope
    7 |   cout << A*B << endl;
      |             ^
Language: Java

import java.util.*;
public class MyClass {
    public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    int t = sc.nextInt();
   int a = sc.nextInt();
   System.out.println(t*a);
       
       
        
    
    }
}

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

#include <stdio.h>
int main(){
int A,B;
scanf("%d %d",&A,&B)
printf("%d",A*B)
}

Compiler output:
main.c: In function 'main':
main.c:4:21: error: expected ';' before 'printf'
    4 | scanf("%d %d",&A,&B)
      |                     ^
      |                     ;
    5 | printf("%d",A*B)
      | ~~~~~~
Language: C

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mp make_pair
#define INF 0x3f3f3f3f 
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL)
#define ll long long int
#define pi 3.14159265358979
int main() {
    ll a,b;
    cin>>a>>b;
    cout<<a*b;
    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>
using namespace std;
inat main()
{
  int a,b;
  cin>>a>>b;
  cout<<a*b<<endl;
}

Compiler output:
a.cc:3:1: error: 'inat' does not name a type; did you mean 'int'?
    3 | inat main()
      | ^~~~
      | int
Language: C

#include <bits/stdc++.h>

using namespace std;

int main(){
    int a,b;
    cin >> a >> b;
    cout << a*b << 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 <string>
#include <algorithm>

int main()
{
 int A,B;
  cin >> A >> B;
  cout << A * B << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |   cin >> A >> B;
      |   ^~~
      |   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:9:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |   cout << A * B << 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:9:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |   cout << A * B << 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

#include <bits/stdc++.h>

using namespace std;

int main()
{
int A,B;
cin>>A>>B;
  cout<<A*B<<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<bits/stdc++.h>
using namespace std;
int main
{
int a,b;
cin>>a>>b;
cout<<a*b;
return 0;
}

Compiler output:
a.cc:3:5: error: cannot declare '::main' to be a global variable
    3 | int main
      |     ^~~~
a.cc:5:1: error: expected primary-expression before 'int'
    5 | int a,b;
      | ^~~
a.cc:5:1: error: expected '}' before 'int'
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
a.cc:6:1: error: 'cin' does not name a type
    6 | cin>>a>>b;
      | ^~~
a.cc:7:1: error: 'cout' does not name a type
    7 | cout<<a*b;
      | ^~~~
a.cc:8:1: error: expected unqualified-id before 'return'
    8 | return 0;
      | ^~~~~~
a.cc:9:1: error: expected declaration before '}' token
    9 | }
      | ^
Language: C++

include<bits/stdc++.h>
using namespace std;
int main()
{
  int a,b;
  cin>>a>>b;
  cout<<a*b<<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: 'cin' was not declared in this scope
    6 |   cin>>a>>b;
      |   ^~~
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout<<a*b<<endl;
      |   ^~~~
a.cc:7:14: error: 'endl' was not declared in this scope
    7 |   cout<<a*b<<endl;
      |              ^~~~
Language: C++

#include <iostream>
#include <string>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <vector>
#include <fstream>
#include <numeric>
#include <bitset>
#include <sstream>

using namespace std;

#define max(a,b) a > b ? a : b
#define min(a,b) a < b ? a : b

const int BIT_FLAG_00 = (1 << 0);  // 0000 0000 0000 0001
const int BIT_FLAG_01 = (1 << 1);  // 0000 0000 0000 0010
const int BIT_FLAG_02 = (1 << 2);  // 0000 0000 0000 0100
const int BIT_FLAG_03 = (1 << 3);  // 0000 0000 0000 1000
const int BIT_FLAG_04 = (1 << 4);  // 0000 0000 0001 0000
const int BIT_FLAG_05 = (1 << 5);  // 0000 0000 0010 0000
const int BIT_FLAG_06 = (1 << 6);  // 0000 0000 0100 0000
const int BIT_FLAG_07 = (1 << 7);  // 0000 0000 1000 0000
const int BIT_FLAG_08 = (1 << 8);  // 0000 0001 0000 0000
const int BIT_FLAG_09 = (1 << 9);  // 0000 0010 0000 0000
const int BIT_FLAG_10 = (1 << 10); // 0000 0100 0000 0000
const int BIT_FLAG_11 = (1 << 11); // 0000 1000 0000 0000

template <std::size_t n>
std::string to_string(std::bitset<n>& bs)
{
    return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
}

int A,B;

int main() {

    cin >> A >> B;

    cout << A * B << endl;

    return 0;
}

Compiler output:
a.cc: In function 'std::string to_string(std::bitset<_Nb>&)':
a.cc:33:15: warning: expected 'template' keyword before dependent template name [-Wmissing-template-keyword]
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |               ^~~~~~~~~
      |               template
a.cc:33:25: error: expected primary-expression before 'char'
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |                         ^~~~
a.cc:33:25: error: expected ';' before 'char'
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |                         ^~~~
      |                         ;
a.cc:33:29: error: expected unqualified-id before ',' token
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |                             ^
a.cc:33:53: error: invalid declarator before ',' token
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |                                                     ^
a.cc:33:76: error: invalid declarator before '>' token
   33 |     return bs.to_string<char, std::char_traits<char>, std::allocator<char> >();
      |                                                                            ^
Language: C++

#incldue<bits/stdc++.h>
using namespace std;
int main(){
 int a,b;
  cin>>a>>b;
  cout<<a*b<<"\n";
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue<bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin>>a>>b;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incldue<bits/stdc++.h>
a.cc:6:3: error: 'cout' was not declared in this scope
    6 |   cout<<a*b<<"\n";
      |   ^~~~
a.cc:6:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class AtCoderBC169A {
	
	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		InputReader in = new InputReader(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		new Solution().solve(in, out);
		out.close();
	}
	
	static class Solution {
		public void solve(InputReader in, PrintWriter out) {
			int a = in.nextInt();
			int b = in.nextInt();
			out.println(a * b);
		}
	}

	static class InputReader {
		public BufferedReader reader;
		public StringTokenizer tokenizer;

		public InputReader(InputStream stream) {
			reader = new BufferedReader(new InputStreamReader(stream), 32768);
			tokenizer = null;
		}

		public String next() {
			while (tokenizer == null || !tokenizer.hasMoreTokens()) {
				try {
					tokenizer = new StringTokenizer(reader.readLine());
				} catch (IOException e) {
					throw new RuntimeException();
				}
			}
			return tokenizer.nextToken();
		}

		public int nextInt() {
			return Integer.parseInt(next());
		}
	}
}


Compiler output:
Main.java:9: error: class AtCoderBC169A is public, should be declared in a file named AtCoderBC169A.java
public class AtCoderBC169A {
       ^
1 error
Language: C++

#include <stdio.h>

int main(void)
{
    int a, b;

    scnaf("%d%d", &a, &b);

    printf("%d", a*b);

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'scnaf' was not declared in this scope; did you mean 'scanf'?
    7 |     scnaf("%d%d", &a, &b);
      |     ^~~~~
      |     scanf
Language: C

#include <bits/stdc++.h>
using namespace std;
 
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define endl "\n"
#define int long long
 
const int N = 1e5 + 5;\


 
int32_t main()
{
  IOS;
  int n;
  int b;
  cin>>n>>b;
  cout<<n*b;

  
  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: Java

import java.util.Scanner;

public class Multiplication1 {
    private static final Scanner in = new Scanner(System.in);

    public static void main(String[] args) {
        System.out.println(in.nextInt() * in.nextInt());
    }

}


Compiler output:
Main.java:3: error: class Multiplication1 is public, should be declared in a file named Multiplication1.java
public class Multiplication1 {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main() {
  int A, B;
  cin A >> B;
  cout << A*B << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:6: error: expected ';' before 'A'
    6 |   cin A >> B;
      |      ^~
      |      ;
Language: C++

#include<bits/stdc++.h>using namespace std;
int main()
{
  int a,b;
  cin>>a>>b;
  cout<<a*b<<"\n";
  return 0;
}

Compiler output:
a.cc:1:30: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h>using namespace std;
      |                              ^~~~~~~~~
a.cc:1:9: fatal error: bits/stdc++.h>usin: No such file or directory
    1 | #include<bits/stdc++.h>using namespace std;
      |         ^~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int T=1;
    //cin>>T;
    while(T--){
        int a,b;
        cin>>a>>;
        cout<<a*b;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:17: error: expected primary-expression before ';' token
   10 |         cin>>a>>;
      |                 ^
Language: C++

#include<bits/stdc++.h>
#define fi                first
#define se                 second
#define ll               long long
#define mod              1000000007
#define endl              "\n"
#define fast               ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb                push_back
#define all(v)             v.begin(),v.end()
#define inp(V,n)      for(int i=0;i<n;i++){cin >> V[i];}
#define oup(V,n)     {for(int i=0;i<n;i++){cout <<  V[i] << " "  ;} cout << endl;}
using namespace std;
ll factorial(ll n)
{
    return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
}
ll gcd(ll a, ll b)
{
    if (a == 0)
      return b;
    return gcd(b % a, a);
}
ll lcm(ll a, ll b)
{
   return (a*b)/gcd(a, b);
}
bool sortByVal(const pair<double,double> &a,
               const pair<double,double> &b)
{
    if(a.fi==b.fi)
    {
    return (a.se >b.se);
    }
    else
        return (a.fi<b.fi);
}
ll Powb(ll b,ll n)
{
    if(n==0) return 1LL;
    if(n==1) return b;
    ll temp = Powb(b,n/2);
    if(n%2==0){return (temp*temp)%mod;}
    else{return (b*((temp*temp)%mod))%mod;}
}
ll sumofdigit(ll n)
{
    ll c=0,d=0,sum=0,i;
    while(n>0)
    {
        c=n%10;
        sum+=c;
        n/=10;
    }
    return sum;
}
int main()
{
 fast;
     int t=1;
     //cin>>t;
     while(t--)
     {
        ll k,i=0,j=0,c=0,d=0,e=0,f=0,sum=0,g=0,h=0,n,maxi=0;
       cin>>n>>m;
       cout<<n*m;
        
      }


}



Compiler output:
a.cc: In function 'int main()':
a.cc:64:16: error: 'm' was not declared in this scope
   64 |        cin>>n>>m;
      |                ^
Language: C++

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

int main() {
  ll n, m;
  cin >> n >> m;
  cout << n*m << "\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'll' was not declared in this scope
    5 |   ll n, m;
      |   ^~
a.cc:6:10: error: 'n' was not declared in this scope; did you mean 'yn'?
    6 |   cin >> n >> m;
      |          ^
      |          yn
a.cc:6:15: error: 'm' was not declared in this scope; did you mean 'tm'?
    6 |   cin >> n >> m;
      |               ^
      |               tm
Language: C++

#include <stdc++.h>
#include <string>
using namespace std;
#define EXCEPTERROR cout << "-1" << endl;
#define rep(k,nu)    for(int i=k; i<nu;  i++)
#define rep2(k,n)   for(int j=k; j<n;  j++)
#define size_a(array) sizeof(array) / sizeof(array[0])
#define INF 1000000000000 //1e12
#define MOD 10000007 //1e9+7
#define ll long long
#define pb pop_back
template<typename T> inline void chMin(T* a, T* b) {if(*a>*b) *a=*b;}
template<typename T> inline void chMax(T* a, T* b) {if(*a<*b) *a=*b;}
template<typename T> inline int  divUp(T a, T b)   {return ((a+b-1)/b);}
const double PI = acos(-1);

int main(){
    int a, b; cin >> a >> b;
    cout << a*b ;

    return 0;
}
/*

*/

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

#include <bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define pb push_back
#define mod 1000000007
typedef long long int ll;
typedef long long  lint;
typedef pair<int,int> pii;

int main(){
    int a,b;
    cin >> a >> b;
    cout << a*b ;
    return 0l
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:14: error: expected ';' before '}' token
   14 |     return 0l
      |              ^
      |              ;
   15 | }
      | ~