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

#include <stdio.h>

main(){
  int a,b;
  scanf("%d%d",&a&b);
  if(a<10 && b<10){
    printf("%d",a*b);
  }
  else 
    puts(-1);
}
    

Compiler output:
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(){
      | ^~~~
main.c: In function 'main':
main.c:5:18: error: invalid operands to binary & (have 'int *' and 'int')
    5 |   scanf("%d%d",&a&b);
      |                ~~^
      |                |
      |                int *
main.c:10:10: error: passing argument 1 of 'puts' makes pointer from integer without a cast [-Wint-conversion]
   10 |     puts(-1);
      |          ^~
      |          |
      |          int
In file included from main.c:1:
/usr/include/stdio.h:714:30: note: expected 'const char *' but argument is of type 'int'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
Language: C++

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

int main(){
  int a,b;
  cin>>a>>b;
  if(a<1||9<b){
    cout<<-1<<endl;
  }else(
    cout<<a*b<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: expected ')' before ';' token
   12 |     cout<<a*b<<endl;
      |                    ^
      |                    )
a.cc:11:8: note: to match this '('
   11 |   }else(
      |        ^
a.cc: At global scope:
a.cc:14:1: error: expected declaration before '}' token
   14 | }
      | ^
Language: C++

#include <iostream>
#include <algorithm>
#include <iomanip>
#include <string>
#include <vector>
#include <math.h>
#include <queue>
#include <map>
#define ll long long
const int MOD = 1e9+7;
using namespace std;


int main(){
	int x, y;
	cin >> x >> y;
	if (x < 10 && y < 10){
		cout << x*y << endl;
	}else{
		cout << -1 << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:14:11: note: to match this '{'
   14 | int main(){
      |           ^
Language: C

a,b=map(int,input().split())
if a<10 and b<10:
	print(a*b)
else:
	print("-1")

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | a,b=map(int,input().split())
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
main.c:1:3: error: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
    1 | a,b=map(int,input().split())
      |   ^
main.c:1:5: error: implicit declaration of function 'map' [-Wimplicit-function-declaration]
    1 | a,b=map(int,input().split())
      |     ^~~
main.c:1:9: error: expected expression before 'int'
    1 | a,b=map(int,input().split())
      |         ^~~
main.c:2:1: error: expected ',' or ';' before 'if'
    2 | if a<10 and b<10:
      | ^~
Language: C++

#include<iostream>

using namespace std;

int main(){
  int a,b;
  cin>>a>>b;
  if(a<10&&b<10){
    cout<<a*b;
  }else{
    cout<<"-1"
  }

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:15: error: expected ';' before '}' token
   11 |     cout<<"-1"
      |               ^
      |               ;
   12 |   }
      |   ~
Language: C++

int main()
{
  int a, b;
  cin >> a >> b;
  if ((1 <= a && a <= 9) && (1 <= b && b <= 9)) {
    cout << a * b << endl;
  } else {
    cout << "-1" << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope
    4 |   cin >> a >> b;
      |   ^~~
a.cc:6:5: error: 'cout' was not declared in this scope
    6 |     cout << a * b << endl;
      |     ^~~~
a.cc:6:22: error: 'endl' was not declared in this scope
    6 |     cout << a * b << endl;
      |                      ^~~~
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout << "-1" << endl;
      |     ^~~~
a.cc:8:21: error: 'endl' was not declared in this scope
    8 |     cout << "-1" << endl;
      |                     ^~~~
Language: C++

#include<bits/stdc++.h>

int main(){
  using namespace std;
  unsigned long A, B;
  cin >> A >>> B;
  if(A > 0 || B > 0)vout << "No" << endl;
  else cout <<< A * B << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:14: error: expected primary-expression before '>' token
    6 |   cin >> A >>> B;
      |              ^
a.cc:7:21: error: 'vout' was not declared in this scope
    7 |   if(A > 0 || B > 0)vout << "No" << endl;
      |                     ^~~~
a.cc:8:15: error: expected primary-expression before '<' token
    8 |   else cout <<< A * B << endl;
      |               ^
a.cc:8:23: error: invalid operands of types 'long unsigned int' and '<unresolved overloaded function type>' to binary 'operator<<'
    8 |   else cout <<< A * B << endl;
      |                 ~~~~~~^~~~~~~
Language: C++

#include<bits/stdc++.h>
#define int long long
#define mod 1000000007
#define trace(x) cerr<<#x<<": "<<x<<" "<<endl
#define tarce(x) cerr<<#x<<": "<<x<<" "<<endl
#define trace2(x, y) cerr<<#x<<": "<<x<<" | "<<#y<<": "<<y<<endl
#define trace3(x, y, z) cerr<<#x<<":" <<x<<" | "<<#y<<": "<<y<<" | "<<#z<<": "<<z<<endl
#define trace4(a, b, c, d) cerr<<#a<<": "<<a<<" | "<<#b<<": "<<b<<" | "<<#c<<": "<<c<<" | "<<#d<<": "<<d<<endl
#define sa(a,n) for(int i =0 ; i<n ; i++) cin>>a[i]
#define max3(a,b,c) max(a,max(b,c))
#define min3(a,b,c) min(a,min(b,c))
#define pb push_back
#define inf 2e18
#define scan() int n; cin>>n ; int a[n]; for(int i = 0 ; i<n ; i++) cin>>a[i]
#define print(a,n) for(int i = 0 ; i < n ; i++) cout<<a[i]<<' '
#define mem(a,v) memset(a,v,sizeof(a))
#define pii pair<int,int>
#define mkp make_pair
using namespace std;
#define N 200005


int32_t main(){
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout.tie(NULL);
  int a,b;
  cin >> a >> b;
  if(a>9 || b>9)cout << -1;
  else{
cout << a*b;
        
        

}

Compiler output:
a.cc: In function 'int32_t main()':
a.cc:35:2: error: expected '}' at end of input
   35 | }
      |  ^
a.cc:23:15: note: to match this '{'
   23 | int32_t main(){
      |               ^
Language: C++

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

int main(){
  int N;
  cin >>N;
  vector<int> Q(81);
  int k=0;
  bool TF = true;
  for(int i=1;i<10;i++){
    for(int j=1;j<10;j++){
      if(i*j == N){
        TF = false;
      }
      if(TF == false){
        break;
      }
    }
    if(TF ==false){
      break;
  }
  if(TF == false){
    cout <<"Yes"<<endl;
  }
  else {
    cout <<"No" <<endl;
  }
}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:28:2: error: expected '}' at end of input
   28 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
using namespave std;
int main(void)
{
  int a, b;
  cin >> a >> b;
  if (a < 10 && b < 10) cout << a * b << endl;
  else cout << -1 << endl;
  return (0);
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespave'
    2 | using namespave 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:7:25: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   if (a < 10 && b < 10) 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:7:42: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   if (a < 10 && b < 10) 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)
      |     ^~~~
a.cc:8:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   else cout << -1 << 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:8:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   else cout << -1 << endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

toInt :: (String -> Int)
toInt x = read x ::Int

getInts = do
  x <- getLine
  let y = (map$toInt)$words x
  return y

main :: IO ()
main = do
  x y <- getInts -- < 1 2 3 4 5 6
  if x > 9 then print -1 else if y > 9 then print -1 else print (x*y)

Compiler output:
a.cc:1:1: error: 'toInt' does not name a type
    1 | toInt :: (String -> Int)
      | ^~~~~
Language: C++

#include <iostream>

int main() {
    int a,b;
  	cin >> a >> b;
  	if (a<10 && b <10) cout << a * b;
  	else cout << "-1";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         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:6:28: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |         if (a<10 && b <10) cout << a * b;
      |                            ^~~~
      |                            std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:14: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |         else cout << "-1";
      |              ^~~~
      |              std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<iostream>
#include<iomanip>
#include<algorithm>
#include<bitset>
#include<cstdio>
#include<cmath>
#include<deque>
#include<map>
#include<numeric>
#include<queue>
#include<set>
#include<sstream>
#include<stack>
#include<string>
#include<tuple>
#include<utility>
#include<vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<vector<long long>> vvll;
typedef vector<vector<int>> vvi;

#define rep(i, a, n)  for(int i=a; i<n; i++)
#define REP(i, n)  for(int i=0; i<(int)(n); i++)
#define REPS(i, n)  for(int i=1; i<=(int)(n); i++)
#define PER(i, n) for(int i=(int)(n)-1; i>= 0; i--)
#define PERS(i, n)  for(int i=(int)(n); i>0; i--)
#define FOR(i, c) for(__typeof((c).begin()) i = (c).begin(); i!=(c).end(); i++)
#define RFOR(i, c)  for(__typeof((c).rbegin()) i=(c).rbegin(); i!=(c).end(); i++)
#define ALL(container)  (container).begin(), (container).end()
#define RALL(container) (container).rbegin(), (container).rend()
#define SZ(container) (container).size()
#define FILL0(n)  setfill('0') << right << setw(n)
#define mp(a, b)  make_pair(a, b)
#define toLower(c)  c+0x20
#define toUpper(c)  c-0x20
#define pb  push_back
#define eb  emplace_back

const int INF = 1e9;
const long long LLINF = 1e18;
const int MOD = 1000000007;

int main(){
  int A, B; cin >> A >> B;
  if(A>9 || b>9){
    cout << -1 << endl;
  }
  else cout << A*B << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:51:13: error: 'b' was not declared in this scope
   51 |   if(A>9 || b>9){
      |             ^
Language: C++

#include <iostream>
using name space;
int main(){
int a,b;
  cin >> a >> b;
if(a>=10 || b>=10){
  cout << -1 << endl;
}
else{
  cout << a*b << endl;
}
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name space;
      |       ^~~~
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 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 << -1 << 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:7:17: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   cout << -1 << 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)
      |     ^~~~
a.cc:10:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |   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:10:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |   cout << a*b << endl;
      |                  ^~~~
      |                  std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
using name space;
int main(){
int a,b;
  cin >> a >> b;
if(a>=10 || b>=10)
  cout << -1 << endl;
else
  cout << a*b << endl;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name space;
      |       ^~~~
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 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 << -1 << 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:7:17: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   cout << -1 << 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)
      |     ^~~~
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:9:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |   cout << a*b << endl;
      |                  ^~~~
      |                  std::endl
/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;

  if (1 <= A <= 9 && 1 <= B <= 9)
    cout << A * B << endl;
  
  else
    cout << "-1" << endl;
  
}


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;

  if (op == "*" & 1 <= A <= 9 & 1 <= B <= 9)
    cout << A * B << endl;
  
  else
    cout << "-1" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: 'op' was not declared in this scope
    7 |   if (op == "*" & 1 <= A <= 9 & 1 <= B <= 9)
      |       ^~
Language: Java

import java.util.Scanner;
 class Main{
public static void main(String[] args){
  
  Scanner stdIn = new Scanner(System.in);
  
  int a = stdIn.nextInt();
  int b = stdIn.nextInt();
  	if (( a < 10 && b < 10)&&(a>0 && b >0;){
      System.out.println(a*b);
    }else{
      System.out.println(-1);
      
    }
}
 }

Compiler output:
Main.java:9: error: ')' expected
  	if (( a < 10 && b < 10)&&(a>0 && b >0;){
  	                                     ^
Main.java:9: error: illegal start of expression
  	if (( a < 10 && b < 10)&&(a>0 && b >0;){
  	                                      ^
Main.java:11: error: 'else' without 'if'
    }else{
     ^
3 errors
Language: Java

import java.util.Scanner;
 class Main{
public static void main(String[] args){
  
  Scanner stdIn = new Scanner(System.in);
  
  int a = stdIn.nextInt();
  int b = stdIn.nextInt();
  	if ( a * b > 10){
      System.out.println(a*b);
    }else{
      System.out.println(-1);
      
    }
}

Compiler output:
Main.java:15: error: reached end of file while parsing
}
 ^
1 error
Language: Java

import java.util.Scanner;
 
class Main{
public static void main(String[] args){
  
  Scanner stdIn = new Scanner(System.in);
  
  int a = stdIn.nextInt();
  int b = stdIn.nextInt();
  	if ( a * b > 10){
      System.out.println(a*b);
    }elise{
      System.out.println(-1);
      
    }
}

Compiler output:
Main.java:12: error: not a statement
    }elise{
     ^
Main.java:12: error: ';' expected
    }elise{
          ^
Main.java:16: error: reached end of file while parsing
}
 ^
3 errors
Language: Java

import java.util.Scanner;

public static void main(String[] args){
  
  Scanner stdIn = new Scanner(System.in);
  
  int a = stdIn.nextInt();
  int b = stdIn.nextInt();
  	if ( a * b > 10){
      System.out.println(a*b);
    }elise{
      System.out.println(-1);
      
    }
}

Compiler output:
Main.java:11: error: not a statement
    }elise{
     ^
Main.java:3: 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:11: error: ';' expected
    }elise{
          ^
3 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
 int a,b;
  bool flag=0;
  cin>>a>>b;
  for(int i=1;i<=9;i++){
   if(a==i){
    for(int j=1;j<=9;j++){
     if(b==j){
		cout<<a*b<<endl;
       flag=1;
       return 0;
     } else{
      flag=0; 
     }
    }else{
     flag=0; 
    }
     if(flag==0){
		cout<<-1<<endl;
     }
   }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:6: error: expected '}' before 'else'
   17 |     }else{
      |      ^~~~
a.cc:8:12: note: to match this '{'
    8 |    if(a==i){
      |            ^
a.cc: At global scope:
a.cc:25:3: error: expected unqualified-id before 'return'
   25 |   return 0;
      |   ^~~~~~
a.cc:26:1: error: expected declaration before '}' token
   26 | }
      | ^
Language: Java


public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		scan.close();
		boolean judge = true;
		
		if (a > 9) {
			System.out.println(-1);
			judge = false;
		}
		if (b > 9) {
			System.out.println(-1);
			judge = false;
		}
		if (judge)	
			System.out.println(a * b);
	}
}

Compiler output:
Main.java:4: error: cannot find symbol
		Scanner scan = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
		Scanner scan = new Scanner(System.in);
		                   ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C++

#include <iostream>
using namespace std;

int main(){
  int A,B;
  cin>>A>>B;
  if((A>9)||(B>9)){
    cout <<"-1"<<endl;
    return 0
  }
  cout <<A*B<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: expected ';' before '}' token
    9 |     return 0
      |             ^
      |             ;
   10 |   }
      |   ~
Language: C++

#include<bits/stdc++.h>
using namaspace std;
int main(){
  int A, B;
cin >> A >> B;
  if(A<9 && B<9) cout << A*B << endl;
  else cout << -1 << endl;
}


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namaspace'
    2 | using namaspace std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:5:1: 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:6:18: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   if(A<9 && B<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:6:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 |   if(A<9 && B<9) 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)
      |     ^~~~
a.cc:7:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   else cout << -1 << 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:7:22: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   else cout << -1 << endl;
      |                      ^~~~
      |                      std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<bits/stdic++.h>
using namaspace std;
int main(){
  int A, B;
cin >> A >> B;
  if(A<9 && B<9) cout << A*B << endl;
  else cout << -1 << endl;
}


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

#include<stdio.h>
using namaspace std;
int main(){
  int A, B;
cin >> A >> B;
  if(A<9 && B<9) cout << A*B << endl;
  else cout << -1 << endl;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namaspace'
    2 | using namaspace std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:5:1: error: 'cin' was not declared in this scope
    5 | cin >> A >> B;
      | ^~~
a.cc:6:18: error: 'cout' was not declared in this scope
    6 |   if(A<9 && B<9) cout << A*B << endl;
      |                  ^~~~
a.cc:6:33: error: 'endl' was not declared in this scope
    6 |   if(A<9 && B<9) cout << A*B << endl;
      |                                 ^~~~
a.cc:7:8: error: 'cout' was not declared in this scope
    7 |   else cout << -1 << endl;
      |        ^~~~
a.cc:7:22: error: 'endl' was not declared in this scope
    7 |   else cout << -1 << endl;
      |                      ^~~~
Language: C++

#include <stdio.h>
int main(){
 int a, b;
  scanf("%d %d",&a, &b);
  if(a>=10){
    printf("-1\n");
  }
  if(b>=10){
    printf("-1\n");
  }
  else{ ("%d\n",a*b)
      }
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:21: error: expected ';' before '}' token
   11 |   else{ ("%d\n",a*b)
      |                     ^
      |                     ;
   12 |       }
      |       ~
Language: C++

#include<stdio.h>
int main(){
 int a, b;
  scanf("%d %d",&a, &b);
  if(a<=9){
    printf("%d\n",a*b);
  }
  if(b<=9){
    printf("%d\n",a*b);
  }
  else{ ("-1\n")
      }
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: expected ';' before '}' token
   11 |   else{ ("-1\n")
      |                 ^
      |                 ;
   12 |       }
      |       ~
Language: C++

#include<stdio.h>
int main(){
 int a, b, sum;
  scanf("%d %d",&a, &b);
  if(a<=10){
    printf("%d\n",a*b);
  }
  if(b<=10){
    printf("%d\n",a*b);
  }
  else{ ("-1\n")
      }
 return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: expected ';' before '}' token
   11 |   else{ ("-1\n")
      |                 ^
      |                 ;
   12 |       }
      |       ~
Language: C++

#include<stdio.h>
int main(){
 int a, b, sum;
  if(a<=10){
    printf("%d\n",a*b);
  }
  if(b<=10){
    printf("%d\n",a*b);
  }
  else{ ("-1\n")
      }
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:17: error: expected ';' before '}' token
   10 |   else{ ("-1\n")
      |                 ^
      |                 ;
   11 |       }
      |       ~
Language: C++

#include<iostream>
using namespace std;

int main()
{
  
  int x,y;
  
  cin>>x>>y;
  if(x=>1&&x<=9&&y>=1&&y<=9)
  {
    cout<<x*y<<endl;
  }
  else
    cout<<"-1"<<endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: expected primary-expression before '>' token
   10 |   if(x=>1&&x<=9&&y>=1&&y<=9)
      |        ^
Language: C++

#include<iostrem>
using namespace std;
int main()
{
  int a,b;
  cin>>a>>b;
  if(a>9||b>9)
    cout<<-1;
  else
    cout<<a*b;
  return 0;
}
  


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

#include<iostrem>
using namespace std;
int main()
{
  int a,b;
  cin>>a>>b;
  if(a>9||b>9)
    cout -1;
  else
    cout<<a*b;
  return 0;
}
  

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

#include <iostream>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int a, b;
    cin >> a >> b;

    if(a < 10 && b < 10)
        print(a*b);

    return -1;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'print' was not declared in this scope; did you mean 'printf'?
   13 |         print(a*b);
      |         ^~~~~
      |         printf
Language: C++

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

   if(A*B<90){
       cout << A*B;
   }else{
       cout << -1;
   }
    return 0;
}

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: C++

#include<bits/stdc++.h>
using namespace std;
#define ll int64_t
#define f first
#define sec second
#define pb push_back
#define pf push_front
#define po pop_back
#define fast ios_base::sync_with_stdio(false)
#define vi vector<ll>
#define vii vector< pair<ll,ll> >
#define pi pair<ll,ll>
#define map map<ll,ll>
#define set set<ll>
#define tostr to_string
#define toint stoi
#define gcd __gcd


int main()
{
  lla,b;cin>>a>>b;
  if((a<=9)&&(b<=9))
    cout<<a*b<<endl;
  else
    cout<<-1<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:3: error: 'lla' was not declared in this scope; did you mean 'll'?
   22 |   lla,b;cin>>a>>b;
      |   ^~~
      |   ll
a.cc:22:7: error: 'b' was not declared in this scope; did you mean 'pb'?
   22 |   lla,b;cin>>a>>b;
      |       ^
      |       pb
a.cc:22:14: error: 'a' was not declared in this scope
   22 |   lla,b;cin>>a>>b;
      |              ^
Language: C++

var a, b:byte;
begin
	readln(a, b);
	if (a>9) or (b>9) then writeln(-1) else writeln(a*b);
end.

Compiler output:
a.cc:1:1: error: 'var' does not name a type
    1 | var a, b:byte;
      | ^~~
a.cc:2:1: error: 'begin' does not name a type
    2 | begin
      | ^~~~~
a.cc:4:9: error: expected unqualified-id before 'if'
    4 |         if (a>9) or (b>9) then writeln(-1) else writeln(a*b);
      |         ^~
a.cc:5:1: error: 'end' does not name a type
    5 | end.
      | ^~~
Language: C++

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


int main()

{
long long n,m;
cin>>n>>m;
if(n>9||m>9)
    cout<<-1<<endl;
else
    cout<<n*m<<endl;

cout<<sum-1<<endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:7: error: 'sum' was not declared in this scope
   15 | cout<<sum-1<<endl;
      |       ^~~
Language: C++

#include<stdio.h>
 int main()
{
   int n,m;
   cin>>n>>m;
   if(n<=9 && m<=9)
     cout<<(n*m);
   else
     cout<<"-1";
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:5:4: error: 'cin' was not declared in this scope
    5 |    cin>>n>>m;
      |    ^~~
a.cc:7:6: error: 'cout' was not declared in this scope
    7 |      cout<<(n*m);
      |      ^~~~
a.cc:9:6: error: 'cout' was not declared in this scope
    9 |      cout<<"-1";
      |      ^~~~
Language: C++

#include<bits/stdc++.h>
int main(){
  int a,b;
  cin>>a>>b;
  if(a<=9 && b<=9) cout<<a*b;
  else cout<<"-1";
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   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:5:20: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |   if(a<=9 && b<=9) cout<<a*b;
      |                    ^~~~
      |                    std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   else cout<<"-1";
      |        ^~~~
      |        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>

int main(){
  int a,b;
  cin >> a >> b;
  if(a<10 && b<10)
    cout << a*b << endl;
  else
    cout << -1 << endl;
}

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:7:5: 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:7:20: 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/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)
      |     ^~~~
a.cc:9:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |     cout << -1 << 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:9:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |     cout << -1 << endl;
      |                   ^~~~
      |                   std::endl
/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,C;
  cin >>A >>B;
  C=A*B;
  if(C/1>9){
    cout << -1;
  }else if(C/9>9){
    cout << -1;
  }else if(C/8>9){
    cout << -1;
  }else if(C/7>9){
    cout << -1;
  }else if(C/6>9){
    cout << -1;
  }else if(C/5>9){
    cout << -1;
  }else if(C/4>9){
    cout << -1;
  }else if(C/3>9){
    cout << -1;
  }else if(C/2>9){
    cout << -1;
  }else if(C/1>9){
    cout << -1;
  }else{
    cout << C;
  }
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected initializer before 'B'
    5 |   int A B,C;
      |         ^
a.cc:6:9: error: 'A' was not declared in this scope
    6 |   cin >>A >>B;
      |         ^
a.cc:6:13: error: 'B' was not declared in this scope
    6 |   cin >>A >>B;
      |             ^
a.cc:7:3: error: 'C' was not declared in this scope
    7 |   C=A*B;
      |   ^
Language: Java

package pong;
import java.util.*;
public class Hi {

	public static void main(String[] args) {
		Scanner t=new Scanner(System.in);
		int x;
		x=t.nextInt();
		boolean ok=false;
		for(int i=0;i<=9;i++) {
			for(int j=0;j<=9;j++) {
				if(i*j==x) {ok=true;}
			}
		}
		if(ok==true) {
			System.out.println("Yes");
		}
		else {
			System.out.println("No");
		}
		t.close();
	}

	

}


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

import java.util.*;
import java.math.*;
public class Main{
        public static void main(String args[])
        {

            Scanner sc = new Scanner(System.in);
            int a = sc.nextInt();
          	int b = sc.nextInt();
          if((a<=9 && a>=1) && (b<=9 && b>=1)
             System.out.println(a*b);
             else
             System.out.println("-1");
        }
}


Compiler output:
Main.java:10: error: ')' expected
          if((a<=9 && a>=1) && (b<=9 && b>=1)
                                             ^
1 error
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();

		if ((A <= 9) && (B <= 9)) {
			System.out.println(A * B);
		} else {
			system.out.println(-1);
		}
		sc.close();
	}
}

Compiler output:
Main.java:12: error: package system does not exist
			system.out.println(-1);
			      ^
1 error
Language: Java

import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
     
      int n = sc.nextInt();
      int count = 0;
      
      for(int i = 1; i <= 9; i++){
        for(int j = 1; j <= 9; j++){
          if(i*j == n){
            count = -1;
            break;
          }else{
            count++;
          }
        }
      }
      
      if(count = -1){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
      
      sc.close();
    }
}

Compiler output:
Main.java:21: error: incompatible types: int cannot be converted to boolean
      if(count = -1){
               ^
1 error
Language: Java

import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
     
      int n = sc.nextInt();
      
      for(int i = 1; i <= 9; i++){
        for(int j = 1; j <= 9; j++){
          if(i*j == n){
            System.out.println("Yes");
              break;
          }else{
            System.out.println("No")
          }
      
      sc.close();
    }
}
import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
     
      int n = sc.nextInt();
      int count = 0;
      
      for(int i = 1; i <= 9; i++){
        for(int j = 1; j <= 9; j++){
          if(i*j == n){
            count = -1;
            break;
          }else{
            count++;
          }
        }
        
        if(count = -1){
          System.out.println("Yes");
        }else{
          System.out.println("No");
        }
          
      
      sc.close();
    }
}
提出情報

Compiler output:
Main.java:15: error: ';' expected
            System.out.println("No")
                                    ^
Main.java:21: error: illegal start of expression
import java.util.Scanner;
^
Main.java:21: error: not a statement
import java.util.Scanner;
                ^
Main.java:23: error: illegal start of expression
public class Main {
^
Main.java:50: error: reached end of file while parsing
????
    ^
5 errors
Language: C++

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

int main()
{
  int a,b;
  cin>>a>>b;
  if(a>=1&&a<=9&&b>=1&&b<=9)
    cout<<(a*b)<<"\n;
    else
      cout<<"-1";
  
  return 0;
}

Compiler output:
a.cc:9:18: warning: missing terminating " character
    9 |     cout<<(a*b)<<"\n;
      |                  ^
a.cc:9:18: error: missing terminating " character
    9 |     cout<<(a*b)<<"\n;
      |                  ^~~~
a.cc: In function 'int main()':
a.cc:10:5: error: expected primary-expression before 'else'
   10 |     else
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define pf push_front
#define mod 1000000007
#define endl '\n'
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);


int main()
{
    unordered_map<ll,ll>mp;
    for(i=1;i<=9;i++)
    {
        for(j=1;j<=9;j++)
        {
            mp[i*j]++;
        }
    }
    ll a,b;
    cin>>a>>b;
    if(mp.find(a*b)!=mp.end())
    {
        cout<<a*b<<endl;
    }
    else 
    {
        cout<<"-1";
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'i' was not declared in this scope
   14 |     for(i=1;i<=9;i++)
      |         ^
a.cc:16:13: error: 'j' was not declared in this scope; did you mean 'jn'?
   16 |         for(j=1;j<=9;j++)
      |             ^
      |             jn
Language: C

#include <stdio.h>

int main(void){
int a,b;
  scanf("%d%d", &a,&b);
  if(a>9 || b > 9){
  printf(-1)
  }else{
  printf("%d", a*b);
  }
}

Compiler output:
main.c: In function 'main':
main.c:7:10: error: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
    7 |   printf(-1)
      |          ^~
      |          |
      |          int
In file included from main.c:1:
/usr/include/stdio.h:363:43: note: expected 'const char * restrict' but argument is of type 'int'
  363 | extern int printf (const char *__restrict __format, ...);
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
main.c:7:13: error: expected ';' before '}' token
    7 |   printf(-1)
      |             ^
      |             ;
    8 |   }else{
      |   ~
Language: C++

#include<iostream>
using namespace std;

int main()
{
	long long N;
	long long sum = 1000000000000;

	cin >> N;

	for(ll i = 1;i*i <= N; i++)
	{
		if (N % i != 0)continue;
		
			if ((i + N / i) <= sum)
			{
				sum = i+N/i;
			}	
		
	}

	

	cout << sum - 2 << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: 'll' was not declared in this scope
   11 |         for(ll i = 1;i*i <= N; i++)
      |             ^~
a.cc:11:22: error: 'i' was not declared in this scope
   11 |         for(ll i = 1;i*i <= N; i++)
      |                      ^
Language: C

#include<stdio.h>
int main(){
  int a,b,ans;
  scanf("%d""%d",&a,&b);
  if(a > 9){
    ans = -1;
  }
  if else(b > 9){
    ans = -1;
  }
  else{
    ans = a*b;
  }
  printf("%d",ans);    
}

Compiler output:
main.c: In function 'main':
main.c:8:6: error: expected '(' before 'else'
    8 |   if else(b > 9){
      |      ^~~~
      |      (
Language: C++

#include <stdio.h>
int main(){
  int a,b;
  scanf("%d%d",&a,&b);
  if (a,b<10){
    printf("%d",a*b);
  }
  else{
    printf('-1');
  }
}

Compiler output:
a.cc:9:12: warning: multi-character character constant [-Wmultichar]
    9 |     printf('-1');
      |            ^~~~
a.cc: In function 'int main()':
a.cc:9:12: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
    9 |     printf('-1');
      |            ^~~~
      |            |
      |            int
In file included from a.cc:1:
/usr/include/stdio.h:363:43: note:   initializing argument 1 of 'int printf(const char*, ...)'
  363 | extern int printf (const char *__restrict __format, ...);
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
Language: C

#include<stdio.h>
int main(){
  int a,b,ans;
  scanf("%d""%d",&a,&b);
  if(a > 9){
    ans = -1;
  }
  if else(b > 9){
    ans = -1;
  }
  else{
    ans = a*b;
  }
  printf("%d",ans)    
}

Compiler output:
main.c: In function 'main':
main.c:8:6: error: expected '(' before 'else'
    8 |   if else(b > 9){
      |      ^~~~
      |      (
Language: C++

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

int main() {
 int a,b;
 cin >> a >> b ;
 if ((a<10)&&(b<10))
   cout << a*b:
  else
    cout << -1 ;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: expected ';' before ':' token
    8 |    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();
      
      if(a <= 9 && b <= 9){
        System.out.println(a*b);
      }else{
        SYstem.out.println(-1);
      }
      
      sc.close();
    }
}


Compiler output:
Main.java:13: error: package SYstem does not exist
        SYstem.out.println(-1);
              ^
1 error
Language: Java

import java.util.*;
public class Main{
  public static void main(String[] args)
  {
    int n = input.nextInt();
    int m = input.nextInt();
    
    if(n>9||m>9)
      System.out.println(-1);
    else
      System.out.println(n*m);
  }
}

Compiler output:
Main.java:5: error: cannot find symbol
    int n = input.nextInt();
            ^
  symbol:   variable input
  location: class Main
Main.java:6: error: cannot find symbol
    int m = input.nextInt();
            ^
  symbol:   variable input
  location: class Main
2 errors
Language: C++

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



int main()
{
	cin>>a>>b;
	if(a>0 && a<10)
	{
		if(b>0 && b<10)
		{
			cout<<a*b<<'\n';
			return 0;
		}
	}
	cout<<"-1\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'a' was not declared in this scope
    8 |         cin>>a>>b;
      |              ^
a.cc:8:17: error: 'b' was not declared in this scope
    8 |         cin>>a>>b;
      |                 ^
Language: Java

import java.util.Scanner;
public class Atcoder2 {
  public static void main(String args[]){
    Scanner nine = new Scanner(System.in);
    int number1 = nine.nextInt();
    int number2 = nine.nextInt();

    if(1<=number1 && number1<=9 && 1<=number2 && number2<=9){
      int answer = number1*number2;
      System.out.println(answer);
    }else{
      System.out.println("-1");
    }
  }
}


Compiler output:
Main.java:2: error: class Atcoder2 is public, should be declared in a file named Atcoder2.java
public class Atcoder2 {
       ^
1 error
Language: C++

#include <iostream>

void main()
{
  int a, b;
  std::cin >>a >> b;
  if(a >9 || b > 9)
  {
    std::cout<< -1<<std::endl;
  }
  else
  {
    std::cout << a*b<< std::endl;
  }
  
  
}

Compiler output:
a.cc:3:1: error: '::main' must return 'int'
    3 | void main()
      | ^~~~
Language: C++

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

int main() {
  int A,B;
  cin >> A >> B;
  if ((A =< 9)&&(B =< 9)) {
    cout << A*B << endl;
  }
  else 
    cout << -1 << endl;  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: expected primary-expression before '<' token
    7 |   if ((A =< 9)&&(B =< 9)) {
      |           ^
a.cc:7:21: error: expected primary-expression before '<' token
    7 |   if ((A =< 9)&&(B =< 9)) {
      |                     ^
Language: C++

#include <iostream>
int main(){
  int a,b;
  cin<<a<<b;
  if(a>0&&b>0&&a<10&&b<10) cout>>a*b;
  else cout>>-1;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   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:5:28: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |   if(a>0&&b>0&&a<10&&b<10) cout>>a*b;
      |                            ^~~~
      |                            std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   else cout>>-1;
      |        ^~~~
      |        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++


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

int main()
{
	//ofstream fcout;
	//fcout.open("output.txt");
	
    ifstream fcin;
    cin.open("input.txt"); 

    	int x,y;
    	fcin>>x>>y;

    	if(x <= 9 && y <= 9)
    	cout<<x*y<<endl;
        else
        cout<<-1<<endl;

    fcin.close();
	//fcout.close();

	return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'std::istream' {aka 'class std::basic_istream<char>'} has no member named 'open'
   13 |     cin.open("input.txt");
      |         ^~~~
Language: C++

#include <iostream>
#include <cstdio>
#include <string>
#include <algorithm>
#include <utility>
#include <cmath>
#include <vector>
#include <queue>
#include <set>
#include <map>
using namespace std;
typedef long long ll;
typedef double db;
typedef vector<ll> vl;
typedef vector<vector<ll>> vvl;
typedef pair<ll, ll> pll;
#define rep(i, n) for(ll i = 0; i < n; i++)
#define exrep(i, a, b) for(ll i = a; i <= b; i++)
#define out() cout << endl
#define out(x) cout << x << endl
#define exout(x) printf("%.10f\n", x)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define pb push_back
#define re0 return 0
const ll mod = 1000000007;
const ll INF = 1e16;

int main() {
    ll a, b;
    cin >> a >> b;

    if(a < 10 && b < 10) {
        cout << a*b;
    }
    else {
        cout << -1;
    }
    
    out();
    re0;
}

Compiler output:
a.cc:20:9: warning: "out" redefined
   20 | #define out(x) cout << x << endl
      |         ^~~
a.cc:19:9: note: this is the location of the previous definition
   19 | #define out() cout << endl
      |         ^~~
a.cc: In function 'int main()':
a.cc:20:26: error: expected primary-expression before '<<' token
   20 | #define out(x) cout << x << endl
      |                          ^~
a.cc:40:5: note: in expansion of macro 'out'
   40 |     out();
      |     ^~~