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

  
   
     string a,b,c;
    cin>>a>>b>>c;
    cout<<a[0]<<b[0]<<c[0]<<endl;


Compiler output:
a.cc:3:6: error: 'string' does not name a type
    3 |      string a,b,c;
      |      ^~~~~~
a.cc:4:5: error: 'cin' does not name a type
    4 |     cin>>a>>b>>c;
      |     ^~~
a.cc:5:5: error: 'cout' does not name a type
    5 |     cout<<a[0]<<b[0]<<c[0]<<endl;
      |     ^~~~
Language: C++

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

int main() {
  string b;
  cin>>a>>b>>c;
  char topb;
  topb=b.at(0);
  cout<<'A'<<topb<<'C'<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: 'a' 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;
      |              ^
Language: C++


#include <bits/stdc++.h>
using namespace std;
int main () {
string S,B,H;
cin>>S>>B>>H;
char j=B.at(1);
cout<<"A"+j+"C"<<endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    8 | cout<<"A"+j+"C"<<endl;
      |       ~~~~~^~~~
      |          |  |
      |          |  const char [2]
      |          const char*
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
string S,B,H;
cin>>S>>B>>H;
cout<<"A"+'B.at(1)'+"C"<<endl;

}



Compiler output:
a.cc:6:11: warning: multi-character literal with 7 characters exceeds 'int' size of 4 bytes
    6 | cout<<"A"+'B.at(1)'+"C"<<endl;
      |           ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:20: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    6 | cout<<"A"+'B.at(1)'+"C"<<endl;
      |       ~~~~~~~~~~~~~^~~~
      |          |          |
      |          |          const char [2]
      |          const char*
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main () {
string S;B;H;
cin>>S>>B>>H;
cout<<"A"+'B.at(1)'+"C"<<endl;

}



Compiler output:
a.cc:6:11: warning: multi-character literal with 7 characters exceeds 'int' size of 4 bytes
    6 | cout<<"A"+'B.at(1)'+"C"<<endl;
      |           ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:4:10: error: 'B' was not declared in this scope
    4 | string S;B;H;
      |          ^
a.cc:4:12: error: 'H' was not declared in this scope
    4 | string S;B;H;
      |            ^
a.cc:6:20: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    6 | cout<<"A"+'B.at(1)'+"C"<<endl;
      |       ~~~~~~~~~~~~~^~~~
      |          |          |
      |          |          const char [2]
      |          const char*
Language: Java

import java.util.Scanner;

public class  Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in); //3つのキャンディーパックを２人に分ける
        String a = sc.next(); //キャンディーa
        String b = sc.next(); //キャンディーb
        String c = sc.nextInt(); //キャンディーc
        
        System.out.println("A" + b.substring(0, 1) + "B");
}
}

Compiler output:
Main.java:8: error: incompatible types: int cannot be converted to String
        String c = sc.nextInt(); //??????c
                             ^
1 error
Language: Java

import java.util.Scanner;

public class  Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in); //3つのキャンディーパックを２人に分ける
        String a = sc.next(); //キャンディーa
        String b = sc.next(); //キャンディーb
        String c = sc.nextInt(); //キャンディーc
        
        System.out.println("A" + b.substring(0, 1) + "B");
}


Compiler output:
Main.java:11: error: reached end of file while parsing
}
 ^
1 error
Language: Java

import java.util.Scanner;

public class  Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in); //3つのキャンディーパックを２人に分ける
        String a = sc.next(); //キャンディーa
        String b = sc.next(); //キャンディーb
        String c = sc.nextInt(); //キャンディーc
        
        System.out.println("A" + b.substring(0, 1) + "B")
    }
}


Compiler output:
Main.java:10: error: ';' expected
        System.out.println("A" + b.substring(0, 1) + "B")
                                                         ^
1 error
Language: C++

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

int main() {
string A,B,C;
  cin >>A>>B>>C;
  cout<<"A";
  cout <<B[0];
  cotu <<"C";

}
 

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'cotu' was not declared in this scope
    9 |   cotu <<"C";
      |   ^~~~
Language: C++

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

int main() {
 String s;
 cin >> s;
 cout << 'A' + s.at(0) + 'C';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:2: error: 'String' was not declared in this scope
    5 |  String s;
      |  ^~~~~~
a.cc:6:9: error: 's' was not declared in this scope
    6 |  cin >> s;
      |         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 String s;
 cin >> s;
 cout << 'A' + s.at(0) + 'C';
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:2: error: 'String' was not declared in this scope
    5 |  String s;
      |  ^~~~~~
a.cc:6:9: error: 's' was not declared in this scope
    6 |  cin >> s;
      |         ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: request for member 'at' in 's', which is of non-class type 'int'
    7 |  cout << 'A' + s.at(0) + 'C';
      |                  ^~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: request for member 'at' in 's', which is of non-class type 'int'
    7 |  cout << "A" + s.at(0) + "C";
      |                  ^~
Language: C

#include<stdio.h>

int main(){
  char s[100];
  for(int i = 0; i<=100; i++){
    scanf("%s", &s[i]);
  }
  printf("A")
  printf("%s\n", s[0]);
  printf("C\n");

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:14: error: expected ';' before 'printf'
    8 |   printf("A")
      |              ^
      |              ;
    9 |   printf("%s\n", s[0]);
      |   ~~~~~~
Language: C++

#include <bits/stdc++.h> 

using namespace std;

#define YES cout << "YES" << endl;
#define NO  cout << "NO"  << endl;
#define Yes cout << "Yes" << endl;
#define No  cout << "No"  << endl;
 
#define INF INT_MAX
#define MOD 1000000007
#define PI  acos(-1)

using ll  = long long;
using ull = unsigned long long;
using Pii = pair<int, int>;
using Pll = pair<ll, ll>;

#define rep(i, n) for (ll i = 0; i < (n); i++)
#define rrep(i, n) for (ll i = (n)-1; i >= 0; i--)

int main(int argc, char *argv[])
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    string s;
    cin >> s;

    cout << "A"+s[8]+"C" << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:30:21: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   30 |     cout << "A"+s[8]+"C" << endl;
      |                     ^~~~
      |                      |
      |                      const char [2]
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
string r s t;
cin >> r >> s >> t;

 cout << "A"<< s.at(1) << "C";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:10: error: expected initializer before 's'
    5 | string r s t;
      |          ^
a.cc:6:8: error: 'r' was not declared in this scope
    6 | cin >> r >> s >> t;
      |        ^
a.cc:6:13: error: 's' was not declared in this scope
    6 | cin >> r >> s >> t;
      |             ^
a.cc:6:18: error: 't' was not declared in this scope; did you mean 'tm'?
    6 | cin >> r >> s >> t;
      |                  ^
      |                  tm
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
string s;
cin >> s;
char S;
s.at(1) == S;
 cout << A << S << C;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: 'A' was not declared in this scope
    9 |  cout << A << S << C;
      |          ^
a.cc:9:20: error: 'C' was not declared in this scope
    9 |  cout << A << S << C;
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
string s;
cin >> s;
s.at(1) == S;
 cout << A << S << C;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: 'S' was not declared in this scope
    7 | s.at(1) == S;
      |            ^
a.cc:8:10: error: 'A' was not declared in this scope
    8 |  cout << A << S << C;
      |          ^
a.cc:8:20: error: 'C' was not declared in this scope
    8 |  cout << A << S << C;
      |                    ^
Language: C++

#include<iostream>
using namespace std;

int main(){
  string win;
  cin >> win;
  char a;
  a = win.at(8)
  
  cout << "A" << a << "C" << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: expected ';' before 'cout'
    8 |   a = win.at(8)
      |                ^
      |                ;
    9 | 
   10 |   cout << "A" << a << "C" << endl;
      |   ~~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  string win;
  cin >> win;
  
  cout << "A" << string.at(8) << "C" << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: expected primary-expression before '.' token
    8 |   cout << "A" << string.at(8) << "C" << endl;
      |                        ^
Language: C++

#include<iostream>
using namespace std;

int main(){
  vector<string> win;
  cin >> win;
  
  cout << "A" << win.at(8) << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'vector' was not declared in this scope
    5 |   vector<string> win;
      |   ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include<iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:5:16: error: expected primary-expression before '>' token
    5 |   vector<string> win;
      |                ^
a.cc:5:18: error: 'win' was not declared in this scope
    5 |   vector<string> win;
      |                  ^~~
Language: C++

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

int main() {
  stirng a, b, c; cin >> a >> b >> c;
  cout << a.at(0) << b.at(0) << c.at(0) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'stirng' was not declared in this scope
    5 |   stirng a, b, c; cin >> a >> b >> c;
      |   ^~~~~~
a.cc:5:26: error: 'a' was not declared in this scope
    5 |   stirng a, b, c; cin >> a >> b >> c;
      |                          ^
a.cc:5:31: error: 'b' was not declared in this scope
    5 |   stirng a, b, c; cin >> a >> b >> c;
      |                               ^
a.cc:5:36: error: 'c' was not declared in this scope
    5 |   stirng a, b, c; cin >> a >> b >> c;
      |                                    ^
Language: C++

#include<cstdio>
int main(){
  char a, x, c;
  scanf("%s %s %s", a, x, c);
  
  printf("%s%s%s", a[0], x[0], c[0]);
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:21: error: invalid types 'char[int]' for array subscript
    6 |   printf("%s%s%s", a[0], x[0], c[0]);
      |                     ^
a.cc:6:27: error: invalid types 'char[int]' for array subscript
    6 |   printf("%s%s%s", a[0], x[0], c[0]);
      |                           ^
a.cc:6:33: error: invalid types 'char[int]' for array subscript
    6 |   printf("%s%s%s", a[0], x[0], c[0]);
      |                                 ^
Language: C++

#include<cstdio>
int main(){
  char s[100];
  scanf("%s", s[]);
  
  printf("A%sC", s[8]);
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:17: error: expected primary-expression before ']' token
    4 |   scanf("%s", s[]);
      |                 ^
Language: C++

#include<cstdio>
int main(){
  char x;
  scanf("%s", x);
  
  printf("A%sC", x[7]);
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:19: error: invalid types 'char[int]' for array subscript
    6 |   printf("A%sC", x[7]);
      |                   ^
Language: C++

#include <iostream>
using namespace std;
 
int main(){
  long long a, b, x;
  cin >> a >> b >> x;
  a += (1 - a%x);
　b -= b%x;
 long long res=0;
  if(a==b)
    res =0;
  else{
   res = b/x - a/x +1;}
  cout << res << endl;
}
  

Compiler output:
a.cc:8:1: error: extended character 　 is not valid in an identifier
    8 | 　b -= b%x;
      | ^
a.cc: In function 'int main()':
a.cc:8:1: error: '\U00003000b' was not declared in this scope
    8 | 　b -= b%x;
      | ^~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  long long a, b, x;
  cin >> a >> b >> x;
  a += 1 - a%x;
　b -= b%x;
 long long res=0;
  if(a==b)
    res =0;
  else{
   res = b/x - a/x +1;}
  cout << res << endl;
}
  

Compiler output:
a.cc:8:1: error: extended character 　 is not valid in an identifier
    8 | 　b -= b%x;
      | ^
a.cc: In function 'int main()':
a.cc:8:1: error: '\U00003000b' was not declared in this scope
    8 | 　b -= b%x;
      | ^~~
Language: C++

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

int main() {
  string S,A,C;
  cin >> S;
char X;

A="A";
C="C";

X=S.at(0);
 
string A2 = A + X;

cout << A2 + c << endl; 

}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:14: error: 'c' was not declared in this scope
   16 | cout << A2 + c << endl;
      |              ^
Language: C++

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

int main() {
  string S,A,C;
  cin >> S;
char X;

A="A";
C="C";

X=S.at(0);
 
cout << "A"+X+"C" << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:14: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   14 | cout << "A"+X+"C" << endl;
      |         ~~~~~^~~~
      |            |  |
      |            |  const char [2]
      |            const char*
Language: C++

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

int main() {
  string S,A,C;
  cin >> S;
char X;

A="A";
C="C";

X=S.at(0);
 
cout << AXC << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'AXC' was not declared in this scope
   14 | cout << AXC << endl;
      |         ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
string a,b,c;
  cin >>a>>b>>c;
  cout <<'A'<<s.at(0)<<'C';
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:15: error: 's' was not declared in this scope
    7 |   cout <<'A'<<s.at(0)<<'C';
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
string s 
  cin >>s
  cout <<'A'<<s.at(0)<<'c';
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: expected initializer before 'cin'
    6 |   cin >>s
      |   ^~~
Language: C

#include <stdio.h>
int main(){
  char s[];
  gets("%s",s);
  printf("A%sC",&s[9]);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:3:8: error: array size missing in 's'
    3 |   char s[];
      |        ^
main.c:4:3: error: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
    4 |   gets("%s",s);
      |   ^~~~
      |   fgets
Language: C

#include <stdio.h>
int main(){
  char s[101];
  scanf("%s",s);
  S[1] ='\0';
  printf("A%sC",s);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: 'S' undeclared (first use in this function)
    5 |   S[1] ='\0';
      |   ^
main.c:5:3: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>
int main(){
  char s[101];
  scanf("%s",s);
  S[1] = \0;
  printf("A%sC",s);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: 'S' undeclared (first use in this function)
    5 |   S[1] = \0;
      |   ^
main.c:5:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:5:10: error: stray '\' in program
    5 |   S[1] = \0;
      |          ^
Language: C

#include <stdio.h>
int main(){
  char s[101];
  scandf("%s",s);
  printf("A%sC",s[0]);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:3: error: implicit declaration of function 'scandf'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    4 |   scandf("%s",s);
      |   ^~~~~~
      |   scanf
Language: C

#include <stdio.h>
int main(){
  char s[];
  scan("%s",s);
  printf("A%sC",s[0]);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:3:8: error: array size missing in 's'
    3 |   char s[];
      |        ^
main.c:4:3: error: implicit declaration of function 'scan'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    4 |   scan("%s",s);
      |   ^~~~
      |   scanf
Language: C++

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

int main() {
  int Atcoder, s, Contest ;
  cin >> Atcoder >> s >> Contest;
  
  string sat = Atcoder ;
  
  string str = s ;
  
  string con = Contest ;
    
    cout << sat.at(0) << str.at(0) << con.at(0)
}
  
  
  
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string sat = Atcoder ;
      |                ^~~~~~~
a.cc:10:16: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   10 |   string str = s ;
      |                ^
a.cc:12:16: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   12 |   string con = Contest ;
      |                ^~~~~~~
a.cc:14:48: error: expected ';' before '}' token
   14 |     cout << sat.at(0) << str.at(0) << con.at(0)
      |                                                ^
      |                                                ;
   15 | }
      | ~                                               
a.cc: At global scope:
a.cc:20:1: error: expected declaration before '}' token
   20 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 string a, b, c;
 cin >> a >> b >> c;
 char d=a.at(0);
 cout << "A"+d+"C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    8 |  cout << "A"+d+"C" << endl;
      |          ~~~~~^~~~
      |             |  |
      |             |  const char [2]
      |             const char*
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  
  cins>>s;
  
  cout<<'A'<<s.at(0)<<'C'<<endl;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  
  cins>>s;
  
  cout<<'A'<<S.at(0)<<'C'<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'cins' was not declared in this scope
    6 |   cins>>s;
      |   ^~~~
a.cc:8:14: error: 'S' was not declared in this scope
    8 |   cout<<'A'<<S.at(0)<<'C'<<endl;
      |              ^
Language: C++

#include<iostream>
#include<algorithm>
using namespace std;
int main(){
    string a,b,c;
    cin>>a>>b>>c;
    transform(b.begin(),b.end(),b.begin(), toupper);
    cout<<a<<b<<c<<endl;
}
    





Compiler output:
a.cc: In function 'int main()':
a.cc:7:14: error: no matching function for call to 'transform(std::__cxx11::basic_string<char>::iterator, std::__cxx11::basic_string<char>::iterator, std::__cxx11::basic_string<char>::iterator, <unresolved overloaded function type>)'
    7 |     transform(b.begin(),b.end(),b.begin(), toupper);
      |     ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/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:   template argument deduction/substitution failed:
a.cc:7:14: note:   couldn't deduce template parameter '_UnaryOperation'
    7 |     transform(b.begin(),b.end(),b.begin(), toupper);
      |     ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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, 4 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, 4 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, 4 provided
Language: C++

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

int main () {
  string str;
  cin >> str;
  char c = str.at(7)
  cout << "A" << c << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: expected ',' or ';' before 'cout'
    8 |   cout << "A" << c << "C" << endl;
      |   ^~~~
Language: C++

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

int main () {
  char s;
  cin >> s;
  cout << "A" << s.at(0) << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: request for member 'at' in 's', which is of non-class type 'char'
    7 |   cout << "A" << s.at(0) << "C" << endl;
      |                    ^~
Language: C++

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

int main () {
  string s;
  cin >> s;
  cout << "A" << s.st(0) << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'st'; did you mean 'at'?
    7 |   cout << "A" << s.st(0) << "C" << endl;
      |                    ^~
      |                    at
Language: C++

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

int main () {
  string  AtCoder s Contest;
  cin >> AtCoder s Contest;
  char x = AtCoder s Contest.at(8);
  cout << "A" << x << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:19: error: expected initializer before 's'
    5 |   string  AtCoder s Contest;
      |                   ^
a.cc:6:10: error: 'AtCoder' was not declared in this scope
    6 |   cin >> AtCoder s Contest;
      |          ^~~~~~~
Language: C++

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

int main () {
  string  AtCoder s Contest;
  cin >> AtCoder s Contest;
  string x = AtCoder s Contest.at(8)
  cout << "A" << x << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:19: error: expected initializer before 's'
    5 |   string  AtCoder s Contest;
      |                   ^
a.cc:6:10: error: 'AtCoder' was not declared in this scope
    6 |   cin >> AtCoder s Contest;
      |          ^~~~~~~
a.cc:7:22: error: expected ',' or ';' before 's'
    7 |   string x = AtCoder s Contest.at(8)
      |                      ^
Language: C++

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

int main () {
  string  AtCoder s Contest;
  cin >> AtCoder s Contest;

  cout << "A" << AtCoder s Contest.at(8) << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:19: error: expected initializer before 's'
    5 |   string  AtCoder s Contest;
      |                   ^
a.cc:6:10: error: 'AtCoder' was not declared in this scope
    6 |   cin >> AtCoder s Contest;
      |          ^~~~~~~
Language: C++

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

int main () {
  string x;
  cin >> x;
  string s = x.at(8);
  cout << "A" << 's' << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    7 |   string s = x.at(8);
      |              ~~~~^~~
Language: C++

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

int main () {
  string x;
  cin >> x;
  string s = x.at(8);
  cout << "A" << s << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    7 |   string s = x.at(8);
      |              ~~~~^~~
Language: C++

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

int main () {
  string s;
  cin >> s;
  
  cout << "A" << s.at(8) << "C" endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:32: error: expected ';' before 'endl'
    8 |   cout << "A" << s.at(8) << "C" endl;
      |                                ^~~~~
      |                                ;
Language: C++

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

int main () {
  string s;
  cin >> s;
  
  cout << "A" << " s.at(8)" << "C" endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:35: error: expected ';' before 'endl'
    8 |   cout << "A" << " s.at(8)" << "C" endl;
      |                                   ^~~~~
      |                                   ;
Language: C++

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

int main() {
  string c;
  cin >> “AtCoder” >> c >> “Contest”;

  cout << “AtCoder”s.at(0) << c.at(0) << “Contest”s.at(0) << endl;

}


Compiler output:
a.cc:6:10: error: extended character “ is not valid in an identifier
    6 |   cin >> “AtCoder” >> c >> “Contest”;
      |          ^
a.cc:6:10: error: extended character ” is not valid in an identifier
a.cc:6:28: error: extended character “ is not valid in an identifier
    6 |   cin >> “AtCoder” >> c >> “Contest”;
      |                            ^
a.cc:6:28: error: extended character ” is not valid in an identifier
a.cc:8:11: error: extended character “ is not valid in an identifier
    8 |   cout << “AtCoder”s.at(0) << c.at(0) << “Contest”s.at(0) << endl;
      |           ^
a.cc:8:11: error: extended character ” is not valid in an identifier
a.cc:8:42: error: extended character “ is not valid in an identifier
    8 |   cout << “AtCoder”s.at(0) << c.at(0) << “Contest”s.at(0) << endl;
      |                                          ^
a.cc:8:42: error: extended character ” is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:10: error: '\U0000201cAtCoder\U0000201d' was not declared in this scope
    6 |   cin >> “AtCoder” >> c >> “Contest”;
      |          ^~~~~~~~~
a.cc:6:28: error: '\U0000201cContest\U0000201d' was not declared in this scope
    6 |   cin >> “AtCoder” >> c >> “Contest”;
      |                            ^~~~~~~~~
a.cc:8:11: error: '\U0000201cAtCoder\U0000201ds' was not declared in this scope
    8 |   cout << “AtCoder”s.at(0) << c.at(0) << “Contest”s.at(0) << endl;
      |           ^~~~~~~~~~
a.cc:8:42: error: '\U0000201cContest\U0000201ds' was not declared in this scope
    8 |   cout << “AtCoder”s.at(0) << c.at(0) << “Contest”s.at(0) << endl;
      |                                          ^~~~~~~~~~
Language: C++

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

Compiler output:
a.cc:2:20: error: expected ';' before '+' token
    2 | using namespace std+
      |                    ^
      |                    ;
a.cc:2:20: error: expected unqualified-id before '+' token
Language: C++

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

int main(){
  String a,b;
  cin << a << b;

  cout << "A" << b.at(0) << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'String' was not declared in this scope
    5 |   String a,b;
      |   ^~~~~~
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin << a << b;
      |          ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin << a << b;
      |               ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: invalid types 'char[int]' for array subscript
    6 |   cout << a[0] << b [0] << c[0] << endl;
      |            ^
a.cc:6:21: error: invalid types 'char[int]' for array subscript
    6 |   cout << a[0] << b [0] << c[0] << endl;
      |                     ^
a.cc:6:29: error: invalid types 'char[int]' for array subscript
    6 |   cout << a[0] << b [0] << c[0] << endl;
      |                             ^
Language: C++

#include <bits/stdc++.h>
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:9:30: error: expected ';' before 'endl'
    9 |   cout << a[0]<< b[0] << c[0] endl;
      |                              ^~~~~
      |                              ;
Language: C++

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

int main(){
string s,t,u;
cin>>s;

cout<<"A"<<t.st(0)<<"C"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'st'; did you mean 'at'?
    8 | cout<<"A"<<t.st(0)<<"C"<<endl;
      |              ^~
      |              at
Language: C++

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

int main(){
char s ;
cin>>s;

cout<<"A"<<s.at(0)<<"C"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: request for member 'at' in 's', which is of non-class type 'char'
    8 | cout<<"A"<<s.at(0)<<"C"<<endl;
      |              ^~
Language: C++

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

int main(){
string AtCoder s Contest ;
cin>>AtCoder s Contest;

cout<<"A"<<AtCoder s Contest.at(0)<<"C"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:16: error: expected initializer before 's'
    5 | string AtCoder s Contest ;
      |                ^
a.cc:6:6: error: 'AtCoder' was not declared in this scope
    6 | cin>>AtCoder s Contest;
      |      ^~~~~~~
Language: C++

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

int main(){
string AtCoder s Contest ;
cin>>AtCoder s Contest;

cout<<"A"<<s.at(0)<<"C"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:16: error: expected initializer before 's'
    5 | string AtCoder s Contest ;
      |                ^
a.cc:6:6: error: 'AtCoder' was not declared in this scope
    6 | cin>>AtCoder s Contest;
      |      ^~~~~~~
a.cc:8:12: error: 's' was not declared in this scope
    8 | cout<<"A"<<s.at(0)<<"C"<<endl;
      |            ^
Language: C++

#include<stdio.h>
int main(void)
{
	char a[8];
	char s[101];
	char c[8];
	scanf("%s",&a);
	scanf("%s",&s);
	scanf("%s",&c);
	printf("%s\n",a[0]s[0]c[0]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:27: error: expected ')' before 's'
   10 |         printf("%s\n",a[0]s[0]c[0]);
      |               ~           ^
      |                           )
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
string S;
cin >> S;
cout << A << S.at(0) << C << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'A' was not declared in this scope
    6 | cout << A << S.at(0) << C << endl;
      |         ^
a.cc:6:25: error: 'C' was not declared in this scope
    6 | cout << A << S.at(0) << C << endl;
      |                         ^
Language: C++

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

int main(){
  string s;
  cin>>s;
  string ans=s[0];
  cout<<'A'<<ans<<'C'<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string ans=s[0];
      |                 ^
Language: C++

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

int main(){
  string s;
  cin>>s;
  string ans=s.front();
  cout<<'A'<<ans<<'C'<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:21: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string ans=s.front();
      |              ~~~~~~~^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string a,b,c;
  cin >> a>.b>>c;
  
  char d,e,f;
  d=a.at(0);
  e=b.at(0);
  f=c.at(0);
  cout<<d<<e<<f<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: expected primary-expression before '.' token
    6 |   cin >> a>.b>>c;
      |            ^
Language: C++

#!/usr/bin/env python
print("A%sC" % list(map(str,input().split()))[1][0])


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #!
    1 | #!/usr/bin/env python
      |  ^
a.cc:2:6: error: expected constructor, destructor, or type conversion before '(' token
    2 | print("A%sC" % list(map(str,input().split()))[1][0])
      |      ^
Language: C++

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

  char B = b.at(0);
  cout << "ABC" << endl:
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'str' was not declared in this scope; did you mean 'std'?
    6 |   str a,b,c;
      |   ^~~
      |   std
a.cc:7:10: error: 'a' was not declared in this scope
    7 |   cin >> a >> b >> c;
      |          ^
a.cc:7:15: error: 'b' was not declared in this scope
    7 |   cin >> a >> b >> c;
      |               ^
a.cc:7:20: error: 'c' was not declared in this scope
    7 |   cin >> a >> b >> c;
      |                    ^
a.cc:10:24: error: expected ';' before ':' token
   10 |   cout << "ABC" << endl:
      |                        ^
      |                        ;
Language: C++

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

int main() {
string a, b, c;
cin >> a >> b >> c;
char x;
x = b.at(0);
cout << "A" + x + "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    9 | cout << "A" + x + "C" << endl;
      |         ~~~~~~~ ^ ~~~
      |             |     |
      |             |     const char [2]
      |             const char*
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
string A,S,C;
cin >> A;
cin >> S;
cin >> C;
char s;
s = S.at(0);
cout << "A"+s+"C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:14: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   10 | cout << "A"+s+"C" << endl;
      |         ~~~~~^~~~
      |            |  |
      |            |  const char [2]
      |            const char*
Language: C++

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

int main(){
    string s, t, u;
    cin >> s >> t >> u;
    cout << "A" + t[0] + "C" << endl;
 }


Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    7 |     cout << "A" + t[0] + "C" << endl;
      |                        ^ ~~~
      |                          |
      |                          const char [2]
Language: C++

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

int main(){
  std::string a,b,c;
  cin >> a >> b >> c;
  cout << "A" + b.at(0) + "C" << endl;
}  


Compiler output:
a.cc: In function 'int main()':
a.cc:7:25: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    7 |   cout << "A" + b.at(0) + "C" << endl;
      |           ~~~~~~~~~~~~~ ^ ~~~
      |               |           |
      |               const char* const char [2]
Language: C++

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

int main(){
  string a,b,c;
  cin >> a >> b >> c;
  cout << "A" + b.at(0) + "C" << endl;
}  


Compiler output:
a.cc: In function 'int main()':
a.cc:7:25: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    7 |   cout << "A" + b.at(0) + "C" << endl;
      |           ~~~~~~~~~~~~~ ^ ~~~
      |               |           |
      |               const char* const char [2]
Language: C++

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

int main() {
	string s;
	cin >> s;
	char c = str.at(0);
	cout << 'A' << c << 'C' << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: 'str' was not declared in this scope; did you mean 'std'?
    7 |         char c = str.at(0);
      |                  ^~~
      |                  std
Language: C++

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

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

	cout << a.at(0)<<b.at(0) << c.at(0)<< endl;

}

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

#include <cstdio>
using namespace std;

int main() {

    long long a, b, x;
    scanf("%lld %lld %lld", &a, &b, &x);

    printf("%lld", b/x - max(0, (a-1))/x);
}



Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: 'max' was not declared in this scope
    9 |     printf("%lld", b/x - max(0, (a-1))/x);
      |                          ^~~
Language: C++

int main(){
  string a, s, c; cin >> a >> s >> c;
  cout << "A" << s[0] << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:3: error: 'string' was not declared in this scope
    2 |   string a, s, c; cin >> a >> s >> c;
      |   ^~~~~~
a.cc:2:19: error: 'cin' was not declared in this scope
    2 |   string a, s, c; cin >> a >> s >> c;
      |                   ^~~
a.cc:2:26: error: 'a' was not declared in this scope
    2 |   string a, s, c; cin >> a >> s >> c;
      |                          ^
a.cc:2:31: error: 's' was not declared in this scope
    2 |   string a, s, c; cin >> a >> s >> c;
      |                               ^
a.cc:2:36: error: 'c' was not declared in this scope
    2 |   string a, s, c; cin >> a >> s >> c;
      |                                    ^
a.cc:3:3: error: 'cout' was not declared in this scope
    3 |   cout << "A" << s[0] << "C" << endl;
      |   ^~~~
a.cc:3:33: error: 'endl' was not declared in this scope
    3 |   cout << "A" << s[0] << "C" << endl;
      |                                 ^~~~
Language: C++

#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <limits.h>
#include <map>
#include <math.h>
#include <queue>
#include <set>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <cstdio>
#include <list>
#define ll long long
#define rep2(i,a,b) for(int i=a;i<=b;i++)
#define rep(i,n) for(int i=0;i<n;i++)
#define rep3(i,a,b) for(int i=a;i>=b;i--)
#define REP(e,v) for(auto e:v)
#define pii pair<int,int>
#define pll pair<ll,ll>
#define tii tuple<int,int,int>
#define pq priority_queue<int>
#define pqg priority_queue<int,vector<int>,greater<int>>
#define pb push_back
#define edge(v,a,b) v[a].pb(b);v[b].pb(a);
#define vec vector<int>
#define vecll vector<ll>
#define vecstr vector<string>
#define vecch vector<char>
#define vecpii vector<pii>
#define bs binary_search
#define All(c) (c).begin(),(c).end()
using namespace std;
int in(){int x;scanf("%d",&x);return x;}
string stin(){string s;cin>>s;return s;}
ll lin(){ll x;scanf("%lld",&x);return x;}
vector<vector<bool>> done;
int main(){
    string a=stin(),b=stin();
    cout<<"A"<<s.at(0)<<"C"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:43:16: error: 's' was not declared in this scope
   43 |     cout<<"A"<<s.at(0)<<"C"<<endl;
      |                ^
Language: C++

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

int main() {
     string x;
     cin>>x;
     cout<<"A" <<x. at(8)<<"C" <<endl;
} 


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

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

int main() {
    string s;
    cin >> >> s;
    cout << "A" << s.at(8) << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: expected primary-expression before '>>' token
    6 |     cin >> >> s;
      |            ^~
Language: C++

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

int main() {
    string s:
    cin >> s;
    cout << "A" << s.at(0) << "C" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: found ':' in nested-name-specifier, expected '::'
    5 |     string s:
      |             ^
      |             ::
a.cc:5:12: error: 's' has not been declared
    5 |     string s:
      |            ^
a.cc:6:9: error: qualified-id in declaration before '>>' token
    6 |     cin >> s;
      |         ^~
a.cc:7:20: error: 's' was not declared in this scope
    7 |     cout << "A" << s.at(0) << "C" << endl;
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
REP(i,v.size()){if(i)os<<" ";os<<v[i];}return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
REP(i,v.size()){if(i)os<<endl;os<<v[i];}return os;}

int main() {
    // Write Your Code Below
   string a, b, c;
   cin >> a >> b >> c;
   cout << "A" << B[0] << "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:19: error: 'B' was not declared in this scope
   21 |    cout << "A" << B[0] << "C" << endl;
      |                   ^
Language: C++

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

int main()
{
	char A, B, C;

	cin >> A >> B >> C;

	cout << A[0] + B[0] + C[0] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: invalid types 'char[int]' for array subscript
   10 |         cout << A[0] + B[0] + C[0] << endl;
      |                  ^
a.cc:10:25: error: invalid types 'char[int]' for array subscript
   10 |         cout << A[0] + B[0] + C[0] << endl;
      |                         ^
a.cc:10:32: error: invalid types 'char[int]' for array subscript
   10 |         cout << A[0] + B[0] + C[0] << endl;
      |                                ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
REP(i,v.size()){if(i)os<<" ";os<<v[i];}return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
REP(i,v.size()){if(i)os<<endl;os<<v[i];}return os;}

int main() {
    // Write Your Code Below
    string a,b,c;
    cin >> a >> b >> c;
    cout << "A" + b[0] + "C;
}




Compiler output:
a.cc:21:26: warning: missing terminating " character
   21 |     cout << "A" + b[0] + "C;
      |                          ^
a.cc:21:26: error: missing terminating " character
   21 |     cout << "A" + b[0] + "C;
      |                          ^~~
a.cc: In function 'int main()':
a.cc:22:1: error: expected primary-expression before '}' token
   22 | }
      | ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: 'A' was not declared in this scope
    7 |   cout <<A<<s.at(0)<<C<<endl;
      |          ^
a.cc:7:22: error: 'C' was not declared in this scope
    7 |   cout <<A<<s.at(0)<<C<<endl;
      |                      ^
Language: C++

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

int main() {
  string A, s, C;
  cin >> A >> s >> C;
  
  cout << "A" + s[0] + "C" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    8 |   cout << "A" + s[0] + "C" << endl;
      |                      ^ ~~~
      |                        |
      |                        const char [2]
Language: C++

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

int main(){
  string a,b,c;
  cin >> a >> b >>c;
  char s = b.at(0);
  cout << "A"+s+"c"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    8 |   cout << "A"+s+"c"<<endl;
      |           ~~~~~^~~~
      |              |  |
      |              |  const char [2]
      |              const char*
Language: C++

#include <iostram>
#include <string>
using namespace std;

int main()
{
  string s[3];
  cin >> s[0] >> s[1] >> s[2];
  cout << 'A' << s[1][0] << 'C' << endl;
}

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

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

int main(){
  int A,B,C;
  cin>>A>>B>>C;
  char b=B.at(0);
  cout<<"A"<<b<<"C"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: request for member 'at' in 'B', which is of non-class type 'int'
    7 |   char b=B.at(0);
      |            ^~
Language: C++

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

int main(){
  int A,B,C,b;
  cin>>A>>B>>C;
  b=B.at(0);
  cout<<"A"<<b<<"C"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: request for member 'at' in 'B', which is of non-class type 'int'
    7 |   b=B.at(0);
      |       ^~
Language: C++

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

int main(){
  int A,B,C;
  char b;
  cin>>A>>B>>C;
  b=B.at(0);
  cout<<"A"<<b<<"C"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: request for member 'at' in 'B', which is of non-class type 'int'
    8 |   b=B.at(0);
      |       ^~
Language: C++

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

int main(){
  int A,B,C;
  cin>>A>>B>>C;
  B=B.at(0);
  cout<<"A"<<B<<"C"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: request for member 'at' in 'B', which is of non-class type 'int'
    7 |   B=B.at(0);
      |       ^~
Language: C++

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

int main(){
    string s;
    cin >> a;
    cout << 'A' << s[8] << 'C';
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'a' was not declared in this scope
    6 |     cin >> a;
      |            ^