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

#include <bits/stdc++.h>

using namespace std;

#define INF 1001000100010001000
#define MOD 1000000007
#define EPS 1e-10
#define int long long
#define rep(i, N) for (int i = 0; i < N; i++)
#define Rep(i, N) for (int i = 1; i < N; i++)
#define For(i, a, b) for (int i = (a); i < (b); i++)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define i_i pair<int, int>
#define vi vector<int>
#define vvi vector<vi >
#define vb vector<bool>
#define vvb vector<vb >
#define vp vector< i_i >
#define all(a) (a).begin(), (a).end()
#define Int(x) int x; cin >> x;
#define int2(x, y) Int(x); Int(y);
#define int3(x, y, z) Int(x); int2(y, z);
#define fir first
#define sec second
#define ffir first.first
#define fsec first.second
#define sfir second.first
#define ssec second.second
#define Decimal fixed << setprecision(10)

//int dxy[5] = {0, 1, 0, -1, 0};
// cmd

signed main()
{
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
	
  	string st; cin >> st; cin >> st;
  	cout << "A" << s[0] << "C" << endl;
  
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:24: error: 's' was not declared in this scope; did you mean 'st'?
   42 |         cout << "A" << s[0] << "C" << endl;
      |                        ^
      |                        st
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define INF 1001000100010001000
#define MOD 1000000007
#define EPS 1e-10
#define int long long
#define rep(i, N) for (int i = 0; i < N; i++)
#define Rep(i, N) for (int i = 1; i < N; i++)
#define For(i, a, b) for (int i = (a); i < (b); i++)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define i_i pair<int, int>
#define vi vector<int>
#define vvi vector<vi >
#define vb vector<bool>
#define vvb vector<vb >
#define vp vector< i_i >
#define all(a) (a).begin(), (a).end()
#define Int(x) int x; cin >> x;
#define int2(x, y) Int(x); Int(y);
#define int3(x, y, z) Int(x); int2(y, z);
#define fir first
#define sec second
#define ffir first.first
#define fsec first.second
#define sfir second.first
#define ssec second.second
#define Decimal fixed << setprecision(10)

//int dxy[5] = {0, 1, 0, -1, 0};
// cmd

signed main()
{
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
	
  	string st; cin >> st;
  	cout << "A" << s[0] << "C" << endl;
  
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:24: error: 's' was not declared in this scope; did you mean 'st'?
   42 |         cout << "A" << s[0] << "C" << endl;
      |                        ^
      |                        st
Language: C++

#include<iostream>
#include<string>
using namespace;
int main()
{
  string a,b,c;
  cin>>a>>b>>c;
  cout<<a[0]<<b[0]<<c[0]<<endl;
  return 0;
}

Compiler output:
a.cc:3:16: error: expected identifier before ';' token
    3 | using namespace;
      |                ^
a.cc: In function 'int main()':
a.cc:6:3: error: 'string' was not declared in this scope
    6 |   string a,b,c;
      |   ^~~~~~
a.cc:6:3: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>a>>b>>c;
      |   ^~~
      |   std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:8: error: 'a' was not declared in this scope
    7 |   cin>>a>>b>>c;
      |        ^
a.cc:7:11: error: 'b' was not declared in this scope
    7 |   cin>>a>>b>>c;
      |           ^
a.cc:7:14: error: 'c' was not declared in this scope
    7 |   cin>>a>>b>>c;
      |              ^
a.cc:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout<<a[0]<<b[0]<<c[0]<<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:8:27: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout<<a[0]<<b[0]<<c[0]<<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>
#include<string>
using namespace std;
int main()
{
  string a,b,c;
  cin>>a>>b>>c;
  cout<<a[0]<<b[0]<c[0]<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: invalid operands of types '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} and '<unresolved overloaded function type>' to binary 'operator<<'
    8 |   cout<<a[0]<<b[0]<c[0]<<endl;
Language: C++

#include<iostream>
#include<string>
int main()
{
  string a,b,c;
  cin>>a>>b>>c;
  cout<<a[0]<<b[0]<c[0]<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'string' was not declared in this scope
    5 |   string a,b,c;
      |   ^~~~~~
a.cc:5:3: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin>>a>>b>>c;
      |   ^~~
      |   std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:8: error: 'a' was not declared in this scope
    6 |   cin>>a>>b>>c;
      |        ^
a.cc:6:11: error: 'b' was not declared in this scope
    6 |   cin>>a>>b>>c;
      |           ^
a.cc:6:14: error: 'c' was not declared in this scope
    6 |   cin>>a>>b>>c;
      |              ^
a.cc:7:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   cout<<a[0]<<b[0]<c[0]<<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:7:26: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   cout<<a[0]<<b[0]<c[0]<<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(){
    string a,b,c;
    cin >> a >> b >> c;
    cout << "A" << b[0] << "C\n"
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:33: error: expected ';' before 'return'
    7 |     cout << "A" << b[0] << "C\n"
      |                                 ^
      |                                 ;
    8 |     return 0;
      |     ~~~~~~
Language: C++

#include <iostream>
#include <string>
#include <cstdlib>
#include <algorithm>
using namespace std;

int main(){
    string s;
    cin >> s;
    transform(s.begin(), ::toupper);
    cout << "A + s[0] + C" << endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:14: error: no matching function for call to 'transform(std::__cxx11::basic_string<char>::iterator, int (&)(int) noexcept)'
   10 |     transform(s.begin(), ::toupper);
      |     ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:4:
/usr/include/c++/14/bits/stl_algo.h:4209:5: note: candidate: 'template<class _IIter, class _OIter, class _UnaryOperation> _OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation)'
 4209 |     transform(_InputIterator __first, _InputIterator __last,
      |     ^~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4209:5: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:4247:5: note: candidate: 'template<class _IIter1, class _IIter2, class _OIter, class _BinaryOperation> _OIter std::transform(_IIter1, _IIter1, _IIter2, _OIter, _BinaryOperation)'
 4247 |     transform(_InputIterator1 __first1, _InputIterator1 __last1,
      |     ^~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4247:5: note:   candidate expects 5 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:156:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _UnaryOperation> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> std::transform(_ExecutionPolicy&&, _ForwardIterator1, _ForwardIterator1, _ForwardIterator2, _UnaryOperation)'
  156 | transform(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __result,
      | ^~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:156:1: note:   candidate expects 5 arguments, 2 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:162:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _ForwardIterator, class _BinaryOperation> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> std::transform(_ExecutionPolicy&&, _ForwardIterator1, _ForwardIterator1, _ForwardIterator2, _ForwardIterator, _BinaryOperation)'
  162 | transform(_ExecutionPolicy&& __exec, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2,
      | ^~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:162:1: note:   candidate expects 6 arguments, 2 provided
Language: C++

    #include<stdio.h>
    int main(void){
            char r[100],s[100],t[100];
            scanf("%s %s %s"&r,s,t);
            printf("A%sC",s[0]);
    	return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:4:29: error: invalid operands of types 'const char [9]' and 'char [100]' to binary 'operator&'
    4 |             scanf("%s %s %s"&r,s,t);
      |                   ~~~~~~~~~~^~
      |                   |          |
      |                   |          char [100]
      |                   const char [9]
Language: C++

#include <iostream>
using namespace std;

int main()
{
    string a, x, c;
    cin >> a >> x >> c;

    cour << a[0] << x[0] << c[0] << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'cour' was not declared in this scope
    9 |     cour << a[0] << x[0] << c[0] << endl;
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int ara_D[100][200];
int ara[100000];
char ara1[100000];
int main()
{
    int i,j,k,l,a,b,h,area;
    gets(ara1);
    printf("A%cC\n",ara1[8]);
    return 0;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |     gets(ara1);
      |     ^~~~
      |     getw
Language: C++

#include <iostream>
#include <string>

int main(){
	string s,t,u;
	cin >> s >> t >> u;
	cout << s[0] << s[1] << s[2] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'string' was not declared in this scope
    5 |         string s,t,u;
      |         ^~~~~~
a.cc:5:9: note: suggested alternatives:
In file included from /usr/include/c++/14/iosfwd:41,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:6:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         cin >> s >> t >> u;
      |         ^~~
      |         std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:16: error: 's' was not declared in this scope
    6 |         cin >> s >> t >> u;
      |                ^
a.cc:6:21: error: 't' was not declared in this scope; did you mean 'tm'?
    6 |         cin >> s >> t >> u;
      |                     ^
      |                     tm
a.cc:6:26: error: 'u' was not declared in this scope
    6 |         cin >> s >> t >> u;
      |                          ^
a.cc:7:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |         cout << s[0] << s[1] << s[2] << 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:7:41: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |         cout << s[0] << s[1] << s[2] << endl;
      |                                         ^~~~
      |                                         std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: Java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws Exception {
        // Here your code !
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line = br.readLine();
        String[] word = line.sprit(" ");
        char a = word[0].charAt(0);
        char b = word[1].charAt(0);
        char c = word[2].charAt(0);
        System.out.println(a + b + c);
    }
}

Compiler output:
Main.java:9: error: cannot find symbol
        String[] word = line.sprit(" ");
                            ^
  symbol:   method sprit(String)
  location: variable line of type String
1 error
Language: Java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws Exception {
        // Here your code !
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line = br.readLine();
        String[] word = line.sprit(" ");
        char a = word[0].charAt(0);
        char b = word[1].charAt(0);
        char c = word[2].charAt(0
        System.out.println(a + b + c);
    }
}

Compiler output:
Main.java:12: error: ')' or ',' expected
        char c = word[2].charAt(0
                                 ^
1 error
Language: C++

#include <iostream>
using namespace std;

int main(){
	long long a, b, x;
	cin >> a >> b >> x;
	if (a != 0){
		long long re1 = (a-1) / x;
	}else{
		long long re1 = a / x;
	}
	long long re2 = b / x;
	long long result = re2 - re1;
	cout << result << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:34: error: 're1' was not declared in this scope; did you mean 're2'?
   13 |         long long result = re2 - re1;
      |                                  ^~~
      |                                  re2
Language: C++


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

//int main( int argc, char *argv[] )
{
char S[ 110 ];
char lpAns[] = "ABC";

	ios::sync_with_stdio( false );
	cin.tie( 0 );

	cin >> S;
	cin >> S;
	lpAns[ 1 ] = S[ 0 ];
	cout << lpAns << endl;

	return 0;
}




Compiler output:
a.cc:6:1: error: expected unqualified-id before '{' token
    6 | {
      | ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main() {
   string s;
   cin >> s;
   if (s.size() >= 1){
       char a = s.[0]
       cout << A + a + C << endl;
   }
   
   

}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected unqualified-id before '[' token
    9 |        char a = s.[0]
      |                   ^
Language: C++

package main

import (
  "fmt"
)

func main(){
  var a,b,c string
  fmt.Scan(&a, &b, &c)
  fmt.Println(string(a[0]) + string(b[0]) + string(c[0]))
}

Compiler output:
a.cc:1:1: error: 'package' does not name a type
    1 | package main
      | ^~~~~~~
Language: C++

#include<bits/stdc++.h>
#define fr(i1,m) for(int i1=0;i1<m;i1++)
using namespace std;
int main()
{
        string s;
        while(cin>>s)
        {

           cout<<ss[0];

        }

        return 0;

}




Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: 'ss' was not declared in this scope; did you mean 's'?
   10 |            cout<<ss[0];
      |                  ^~
      |                  s
Language: C++


let _ =
    let a, s, c = Scanf.scanf "%s %s %s" (fun a s c -> a, s, c) in
    Printf.printf "%c%c%c\n" (String.get a 0) (String.get s 0) (String.get c 0)


Compiler output:
a.cc:2:1: error: 'let' does not name a type
    2 | let _ =
      | ^~~
Language: C++

a = map(str,raw_input().split())
#print a
#print a[1][0]
print a[0][0] + a[1][0] + a[2][0]

Compiler output:
a.cc:2:2: error: invalid preprocessing directive #print
    2 | #print a
      |  ^~~~~
a.cc:3:2: error: invalid preprocessing directive #print
    3 | #print a[1][0]
      |  ^~~~~
a.cc:1:1: error: 'a' does not name a type
    1 | a = map(str,raw_input().split())
      | ^
Language: Java

import java.util.*;
public class Main {
 
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		String b = sc.next();
		String c = sc.next();
		System.out.println(a.charAt(0),b.charAt(0)+c,charAt(0));
	}
		
}

Compiler output:
Main.java:10: error: cannot find symbol
		System.out.println(a.charAt(0),b.charAt(0)+c,charAt(0));
		                                             ^
  symbol:   method charAt(int)
  location: class Main
1 error
Language: Java

import java.util.Scanner;
public class AtCoder01 {

	public static void main(String[] args) {
		System.out.println("コンテスト名を入力してください。");
		
		Scanner scan = new Scanner(System.in);
		String str = scan.nextLine();
		
		String[] resultArray = str.split(" ");
		
		String a = resultArray[0].substring(0,1);
		String b = resultArray[1].substring(0,1);
		String c = resultArray[2].substring(0,1);
		
		System.out.println(a + b + c);
	}

}


Compiler output:
Main.java:2: error: class AtCoder01 is public, should be declared in a file named AtCoder01.java
public class AtCoder01 {
       ^
1 error
Language: C++

#include<string.h>
using namespace std;

int main() {
	long long a = 0, b = 0,ad = 0, x = 0, ans = 0;

	cin >> a >> b >> x;

	if ((a%x) == 0) {
		ad = ad - 1;
	}

	ans = (b / x) - ad;

	cout << abs(ans);

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'cin' was not declared in this scope
    7 |         cin >> a >> b >> x;
      |         ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include<string.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:15:9: error: 'cout' was not declared in this scope
   15 |         cout << abs(ans);
      |         ^~~~
a.cc:15:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:15:17: error: 'abs' was not declared in this scope; did you mean 'ans'?
   15 |         cout << abs(ans);
      |                 ^~~
      |                 ans
Language: C++

gets.chomp.split(" ").map{|s| s[0]}.each{|e| print e}

Compiler output:
a.cc:1:1: error: 'gets' does not name a type
    1 | gets.chomp.split(" ").map{|s| s[0]}.each{|e| print e}
      | ^~~~
a.cc:1:36: error: expected unqualified-id before '.' token
    1 | gets.chomp.split(" ").map{|s| s[0]}.each{|e| print e}
      |                                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
cin>>s;
cout<<A;
cout<<s[0];
cout<<C;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: 'A' was not declared in this scope
    7 | cout<<A;
      |       ^
a.cc:9:7: error: 'C' was not declared in this scope
    9 | cout<<C;
      |       ^
Language: C++

<bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
cin>>s;
cout<<A;
cout<<s[0];
cout<<C;
return 0;
}

Compiler output:
a.cc:1:1: error: expected unqualified-id before '<' token
    1 | <bits/stdc++.h>
      | ^
a.cc: In function 'int main()':
a.cc:4:1: error: 'string' was not declared in this scope
    4 | string s;
      | ^~~~~~
a.cc:5:1: error: 'cin' was not declared in this scope
    5 | cin>>s;
      | ^~~
a.cc:5:6: error: 's' was not declared in this scope
    5 | cin>>s;
      |      ^
a.cc:7:1: error: 'cout' was not declared in this scope
    7 | cout<<A;
      | ^~~~
a.cc:7:7: error: 'A' was not declared in this scope
    7 | cout<<A;
      |       ^
a.cc:9:7: error: 'C' was not declared in this scope
    9 | cout<<C;
      |       ^
Language: C++

#include <iostream>
using namespace std;
int main() {
string s;
cin >> s;
cin >> s;
cout << "A" + s[0] + "C" << endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    7 | cout << "A" + s[0] + "C" << endl;
      |                    ^ ~~~
      |                      |
      |                      const char [2]
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
string s,c;
cin >> s >> c >> s;
cout << A<< c[0] <<C << endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'A' was not declared in this scope
    6 | cout << A<< c[0] <<C << endl;
      |         ^
a.cc:6:20: error: 'C' was not declared in this scope
    6 | cout << A<< c[0] <<C << endl;
      |                    ^
Language: C++

Snuke is going to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.

Snuke is going to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.



Compiler output:
a.cc:1:1: error: 'Snuke' does not name a type
    1 | Snuke is going to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.
      | ^~~~~
Language: C++

Snuke is going to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.



Compiler output:
a.cc:1:1: error: 'Snuke' does not name a type
    1 | Snuke is going to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.
      | ^~~~~
Language: C++

oing to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.

Snuke has decided to abbreviate the name of the contest as "AxC". Here, x is the uppercase English letter at the beginning of s.

Given the name of the contest, print the abbreviation of the name.

Compiler output:
a.cc:1:1: error: 'oing' does not name a type
    1 | oing to open a contest named "AtCoder s Contest". Here, s is a string of length 1 or greater, where the first character is an uppercase English letter, and the second and subsequent characters are lowercase English letters.
      | ^~~~
Language: C++

3 ≤ |s| ≤ 10^5
s consists of lowercase English letters.
No two neighboring characters in s are equal.
Input
The input is given from Standard Input in the following format:

s

Compiler output:
a.cc:1:3: error: extended character ≤ is not valid in an identifier
    1 | 3 ≤ |s| ≤ 10^5
      |   ^
a.cc:1:9: error: extended character ≤ is not valid in an identifier
    1 | 3 ≤ |s| ≤ 10^5
      |         ^
a.cc:1:1: error: expected unqualified-id before numeric constant
    1 | 3 ≤ |s| ≤ 10^5
      | ^
Language: C++

Takahashi and Aoki will play a game against each other. The two players alternately performs the following operation, Takahashi going first:

Remove one of the characters in s, excluding both ends. However, a character cannot be removed if removal of the character would result in two neighboring equal characters in s.
The player who be

Compiler output:
a.cc:1:1: error: 'Takahashi' does not name a type
    1 | Takahashi and Aoki will play a game against each other. The two players alternately performs the following operation, Takahashi going first:
      | ^~~~~~~~~
Language: C++

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String A = sc.next();
        String s = sc.next();
        String C = sc.next();
        System.out.println("A"+(String.valueOf(s.charAt(0)))+"C");
    }
}


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

#include <stdio.h>

int main(void) {

    char str1[100],str2[100],str3[100];
    
    scanf("%s %s %s",str1,str2,str3);
    
    printf("%s %s %s\n",str1[0],str2[0],str[0]);
    
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:41: error: 'str' undeclared (first use in this function); did you mean 'str3'?
    9 |     printf("%s %s %s\n",str1[0],str2[0],str[0]);
      |                                         ^~~
      |                                         str3
main.c:9:41: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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

int main (int argc,char* argv[])
{
  int i=0;
  char s[100];
  gets(s);
  while(s[i]){
    if(i==0)
      printf("%c",s[i]);
    if(s[i] ==' ')
      printf("%c",s[i+1]);
    i++;
  }
  return 0;

}













Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:9:3: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |   gets(s);
      |   ^~~~
      |   getw
Language: C++

#include <iostream>
using namespace std;
#include <vector>
#include <stdio.h>
#include <algorithm>
#define _USE_MATH_DEFINES
#include <math.h>
#include <string>
#include <cstdlib>

int main() {
	string a;
	char temp
	for(int i = 0; i < 2; i++) {
		cin >> a;
		if(i == 1) {
			temp = a[0];
		}
	}
	cout << "A" << temp << "C";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: expected initializer before 'for'
   14 |         for(int i = 0; i < 2; i++) {
      |         ^~~
a.cc:14:24: error: 'i' was not declared in this scope
   14 |         for(int i = 0; i < 2; i++) {
      |                        ^
a.cc:20:24: error: 'temp' was not declared in this scope; did you mean 'tm'?
   20 |         cout << "A" << temp << "C";
      |                        ^~~~
      |                        tm
Language: C++

#include <iostream>
using namespace std;
#include <vector>
#include <stdio.h>
#include <algorithm>
#define _USE_MATH_DEFINES
#include <math.h>
#include <string>
#include <cstdlib>

int main() {
	string a;
	for(int i = 0; i < 2; i++) {
		cin >> a;
		if(i == 1) {
			temp = a[0];
		}
	}
	cout << "A" << temp << "C";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:25: error: 'temp' was not declared in this scope; did you mean 'tm'?
   16 |                         temp = a[0];
      |                         ^~~~
      |                         tm
a.cc:19:24: error: 'temp' was not declared in this scope; did you mean 'tm'?
   19 |         cout << "A" << temp << "C";
      |                        ^~~~
      |                        tm
Language: C++

#include <iostream>
using namespace std;
#include <vector>
#include <stdio.h>
#include <algorithm>
#define _USE_MATH_DEFINES
#include <math.h>
#include <string>
#include <cstdlib>

int main() {
	string a;
	for(int i = 0; i < 2; i++) {
		cin >> a
		if(i == 1) {
			temp = a[0];
		}
	}
	cout << "A" << temp << "C"
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:25: error: expected ';' before 'if'
   14 |                 cin >> a
      |                         ^
      |                         ;
   15 |                 if(i == 1) {
      |                 ~~       
a.cc:19:24: error: 'temp' was not declared in this scope; did you mean 'tm'?
   19 |         cout << "A" << temp << "C"
      |                        ^~~~
      |                        tm
Language: C++

#include<bits/stdc++.h>
#include<string.h>
using namespace std;
main()
{
	int i=0;
	char a[101];
	gets(a);
	while(a[i]!=' ')
	i++;
	cout<<"A"<<a[i+1]<<"C";
}

Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:8:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    8 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

#include<bits/stdc++.h>
using namespace std;
main()
{
	int i=0;
	char a[101];
	gets(a);
	while(a[i]!=' ')
	i++;
	cout<<"A"<<a[i+1]<<"C";
}

Compiler output:
a.cc:3:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:7:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

#include <stdio.h>
int main(){
long long int a,b,x;
scanf("%11d,%11d,%11d",&&a,&&b,&&x);
long long int A = [a/x];
long long int B = [b/x];
long long int ans = B-A;
printf("%11d",ans);
return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:21: error: expected ',' before '/' token
    5 | long long int A = [a/x];
      |                     ^
      |                     ,
a.cc:5:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:5:24: error: expected '{' before ';' token
    5 | long long int A = [a/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:5:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    5 | long long int A = [a/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:6:21: error: expected ',' before '/' token
    6 | long long int B = [b/x];
      |                     ^
      |                     ,
a.cc:6:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:6:24: error: expected '{' before ';' token
    6 | long long int B = [b/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:6:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    6 | long long int B = [b/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:4:26: error: label 'a' used but not defined
    4 | scanf("%11d,%11d,%11d",&&a,&&b,&&x);
      |                          ^
a.cc:4:30: error: label 'b' used but not defined
    4 | scanf("%11d,%11d,%11d",&&a,&&b,&&x);
      |                              ^
a.cc:4:34: error: label 'x' used but not defined
    4 | scanf("%11d,%11d,%11d",&&a,&&b,&&x);
      |                                  ^
Language: C++

#include <stdio.h>

int main(){
long long  int a,b,x;
scanf("%11D,%11d,%11d",&&a,&&b,&&x);
long long int A = [a/x];
long long int B = [b/x];
long long int ans = B-A;
printf("%11d",ans);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:21: error: expected ',' before '/' token
    6 | long long int A = [a/x];
      |                     ^
      |                     ,
a.cc:6:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:6:24: error: expected '{' before ';' token
    6 | long long int A = [a/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:6:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    6 | long long int A = [a/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:7:21: error: expected ',' before '/' token
    7 | long long int B = [b/x];
      |                     ^
      |                     ,
a.cc:7:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:7:24: error: expected '{' before ';' token
    7 | long long int B = [b/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:7:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    7 | long long int B = [b/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:5:26: error: label 'a' used but not defined
    5 | scanf("%11D,%11d,%11d",&&a,&&b,&&x);
      |                          ^
a.cc:5:30: error: label 'b' used but not defined
    5 | scanf("%11D,%11d,%11d",&&a,&&b,&&x);
      |                              ^
a.cc:5:34: error: label 'x' used but not defined
    5 | scanf("%11D,%11d,%11d",&&a,&&b,&&x);
      |                                  ^
Language: C++

#include  <stdio.h>

int main(){
long long int a,b,x;
scanf("%11d,%11d,%11d",&&a,&&b,&&c);
long long int A = [a/x];
long long int B = [b/x];
long long int ans = B-A;
printf("%11d,ans);
return 0;
}

Compiler output:
a.cc:9:8: warning: missing terminating " character
    9 | printf("%11d,ans);
      |        ^
a.cc:9:8: error: missing terminating " character
    9 | printf("%11d,ans);
      |        ^~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:21: error: expected ',' before '/' token
    6 | long long int A = [a/x];
      |                     ^
      |                     ,
a.cc:6:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:6:24: error: expected '{' before ';' token
    6 | long long int A = [a/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:6:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    6 | long long int A = [a/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:7:21: error: expected ',' before '/' token
    7 | long long int B = [b/x];
      |                     ^
      |                     ,
a.cc:7:21: error: expected identifier before '/' token
a.cc: In lambda function:
a.cc:7:24: error: expected '{' before ';' token
    7 | long long int B = [b/x];
      |                        ^
a.cc: In function 'int main()':
a.cc:7:19: error: cannot convert 'main()::<lambda()>' to 'long long int' in initialization
    7 | long long int B = [b/x];
      |                   ^~~~~
      |                   |
      |                   main()::<lambda()>
a.cc:10:1: error: expected primary-expression before 'return'
   10 | return 0;
      | ^~~~~~
a.cc:5:26: error: label 'a' used but not defined
    5 | scanf("%11d,%11d,%11d",&&a,&&b,&&c);
      |                          ^
a.cc:5:30: error: label 'b' used but not defined
    5 | scanf("%11d,%11d,%11d",&&a,&&b,&&c);
      |                              ^
a.cc:5:34: error: label 'c' used but not defined
    5 | scanf("%11d,%11d,%11d",&&a,&&b,&&c);
      |                                  ^
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.math.*;
 
public class Main {
	public static void main(String[] args)throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		String[] str = br.readLine().split(" ");
		char c = str[1].substring(0);
		sb.append('A'+c+'C');
		System.out.println(sb);
	}
}

Compiler output:
Main.java:12: error: incompatible types: String cannot be converted to char
		char c = str[1].substring(0);
		                         ^
1 error
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.math.*;
 
public class Main {
	public static void main(String[] args)throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		String[] str = br.readLine().split(" ");
		Char c = str[1].substring(0);
		sb.append('A'+c+'C');
		System.out.println(sb);
	}
}

Compiler output:
Main.java:12: error: cannot find symbol
		Char c = str[1].substring(0);
		^
  symbol:   class Char
  location: class Main
1 error
Language: C

#include<stdio.h>
int main(){
    char s1[100];
    char s2[100;
    char s3[100;


    scanf("%s %s %s",s1,s2,s3);
    printf("%c%c%c\n",s1[0],s2[0],s3[0]);


}

Compiler output:
main.c: In function 'main':
main.c:4:16: error: expected ']' before ';' token
    4 |     char s2[100;
      |                ^
      |                ]
main.c:12:1: error: expected declaration or statement at end of input
   12 | }
      | ^
Language: C++

#include <cstdio>
#include <cstring>

int main(void) {
    char s[200];
    gets(s);
    printf("A%cC\n", s[8]);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    6 |     gets(s);
      |     ^~~~
      |     getw
Language: Java

  public static void main(String[] args) {

      Scanner scan = new Scanner(System.in);
      String chaineCaractere = scan.nextLine();

      String[] motChaine = chaineCaractere.split(" ");

      String raccourciChaine = "";

      for (int i = 0; i < motChaine.length; i++){
        raccourciChaine = raccourciChaine + motChaine[i].charAt(0);
      }

      System.out.println(raccourciChaine.toUpperCase());

  }


Compiler output:
Main.java:1: 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)
1 error
Language: Java

import java.util.Scanner;
public class main {
	public static void main(String[] args){
		Scanner stdIn=new Scanner(System.in);
		String a=stdIn.next();
		String b=stdIn.next();
		String c=stdIn.next();
		System.out.print("A"+b.charAt(0)+"C");
	}
}

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

#include <stdio.h>
#include <string.h>
int main()
{
    int i;
    char a[10000];
    gets(a);
    if(a[0]<='Z'&&a[0]>='A')printf("%c",a[0]);
    for(i=0; i<strlen(a); i++)
        if(a[i]==' '&&a[i+1]<='Z'&&a[i+1]>='A')printf("%c",a[i+1]);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(a);
      |     ^~~~
      |     getw
Language: C++

# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <iostream>
# include <vector>
# include <queue>
# include <stack>
# include <map>
# include <time.h>
# include <math.h>
# include <algorithm>
using namespace std;
# define lowbit(x) ((x)&(-x))
# define pi acos(-1.0)
# define MAXN 250
# define eps 1e-3
# define MAXM 500005
# define MOD 1000000007
# define INF 1000000000
# define MIN(a,b) (a)>(b)?(b):(a)
# define MAX(a,b) (a)<(b)?(b):(a)
# define mem(a,b) memset(a,b,sizeof(a))
# define FOR(i,a,n) for(int i=a; i<=n; ++i)
# define FO(i,a,n) for(int i=a; i<n; ++i)
# define bug puts("H");
typedef long long LL;
typedef unsigned long long ULL;

int main()
{
    int i;
    char a[10000];
    gets(a);
    if(a[0]<='Z'&&a[0]>='A')printf("%c",a[0]);
    for(i=0; i<strlen(a); i++)
        if(a[i]==' '&&a[i+1]<='Z'&&a[i+1]>='A')printf("%c",a[i+1]);
    return 0;
}



















Compiler output:
a.cc: In function 'int main()':
a.cc:33:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
   33 |     gets(a);
      |     ^~~~
      |     getw
Language: C++

#include<bits/stdc++.h>

using namespace std;

int main()
{
    char s[200],ch;

    while(gets(s)){

    ch=s[8];

    cout<<"A"<<ch<<"C"<<endl;
}
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |     while(gets(s)){
      |           ^~~~
      |           getw
Language: C++

#include <string>
#include <iostream>

int main(){
string second;
string tmp;
for (int i = 0; i < 3; i++) {
    if (i == 1) cin >> second;
    else cin >> tmp;
}
cout << second << endl;
cout << "A" << second[0] << "C";
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'string' was not declared in this scope
    5 | string second;
      | ^~~~~~
a.cc:5:1: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:6:7: error: expected ';' before 'tmp'
    6 | string tmp;
      |       ^~~~
      |       ;
a.cc:8:17: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |     if (i == 1) cin >> second;
      |                 ^~~
      |                 std::cin
In file included from a.cc:2:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:24: error: 'second' was not declared in this scope
    8 |     if (i == 1) cin >> second;
      |                        ^~~~~~
a.cc:9:10: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 |     else cin >> tmp;
      |          ^~~
      |          std::cin
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:17: error: 'tmp' was not declared in this scope; did you mean 'tm'?
    9 |     else cin >> tmp;
      |                 ^~~
      |                 tm
a.cc:11:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 | cout << second << 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:11:9: error: 'second' was not declared in this scope
   11 | cout << second << endl;
      |         ^~~~~~
a.cc:11:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 | cout << second << 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()
{
    char s[200],ch;

    gets(s);

    ch=s[8];

    cout<<"A"<<ch<<"C"<<endl;

    return 0;
}


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

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


int main()
{
	char szLine[200];
	gets(szLine);
	char* p = strchr(szLine, ' ');
	p++;
	char cUp = toupper(*p);
	printf("A%cC", cUp);

	return 0;
}

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

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
char a[111];
int main()
{
    gets(a);
   // while()
    {
        int flag=0;
        for(int i=0;i<strlen(a);i++)
        {
            if(a[i]>='A'&&a[i]<='Z'&&!flag) {cout<<a[i];flag=1;}
            if(a[i]==' ') flag=0;
        }
    }
    cout<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    8 |     gets(a);
      |     ^~~~
      |     getw
Language: C++

#include <iostream>

int main() {
	__int64 a, b, x;
	std::cin >> a >> b >> x;

	int ans = (b - a) / x;
	if (b%x == 0) {
		ans++;
	}
	std::cout << ans << std::endl;

	//system("pause");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: '__int64' was not declared in this scope; did you mean '__int64_t'?
    4 |         __int64 a, b, x;
      |         ^~~~~~~
      |         __int64_t
a.cc:5:21: error: 'a' was not declared in this scope
    5 |         std::cin >> a >> b >> x;
      |                     ^
a.cc:5:26: error: 'b' was not declared in this scope
    5 |         std::cin >> a >> b >> x;
      |                          ^
a.cc:5:31: error: 'x' was not declared in this scope
    5 |         std::cin >> a >> b >> x;
      |                               ^
Language: C++

#include <iostream>
#include <cstdio>
#include <cmath>
#include <string.h>
#include <queue>
#include <stack>
#include <algorithm>
#include <fstream>

#define ll long long
#define INF 0x3f3f3f3f
#define clr(x) memset(x,0,sizeof(x))
#define clr2(x) memset(x,INF,sizeof(x))
#define clr3(x) memset(x,-INF,sizeof(x))
#define clr4(x) memset(x,-1,sizeof(x))
#define pb(x) push_back(x)
//#define debug

using namespace std;
const ll mod=1e9+7;

char s[12345];
void solve()
{
   gets(s);
   int pos=0;
    for (int i=0;i<strlen(s);i++)
    if (s[i]==' ')
   {
       pos=i;
       break;
   }
   printf("A%cC",s[pos+1]);
}
int main()
{
    #ifdef debug
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif


        solve();


    return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:25:4: error: 'gets' was not declared in this scope; did you mean 'getw'?
   25 |    gets(s);
      |    ^~~~
      |    getw
Language: C++

#include <stdio.h>

char s[101];

int main()
{
    gets(s);

    int i=0, cnt=0;

    while(s[i]!='\0' && cnt<1)
    {
        if(s[i+1]==32){ i ++; cnt++; }
        i++;
    }

    printf("A%cC\n", s[i]);

    return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(s);
      |     ^~~~
      |     getw