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

//  Created by conan1024hao in 2019.
//  Copyright © 2019 conan1024hao. All rights reserved.
//  専用ライブラリです、自由にコピーして構いません。
//  感谢看我的代码！Wechat:conan1024hao QQ:810396815
#pragma GCC optimize ("O3")
#include <iostream>
#include <iomanip>
#include <istream>
#include <ostream>
#include <sstream>
#include <iterator>
#include <vector>
#include <algorithm>
#include <queue>
#include <deque>
#include <list>
#include <stack>
#include <map>
#include <unordered_map>
#include <set>
#include <utility>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <string>
#include <ctime>
#include <cctype>
#include <cstdlib>
#define IINF 10e8
#define INF 10e16
#define MOD 1000000007
#define  mod 1000000007
#define rep(i, a, n) for (ll i = a; i < (ll)(n); i++)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define mmax(x,y)(x>y?x:y)
#define mmin(x,y)(x<y?x:y)
#define chmax(x,y) x=mmax(x,y)
#define chmin(x,y) x=mmin(x,y)
#define all(x) (x).begin(),(x).end()
#define siz(x) (ll)(x).size()
#define PI acos(-1.0)
using namespace std;
//using Int=int_fast64_t;
typedef long long int ll;
typedef pair<ll,ll>Pll;
typedef pair<int,int>Pin;
long long GCD(long long a, long long b) { return b ? GCD(b, a%b) : a; }
long long LCM(long long a, long long b)  {return a/GCD(a,b)*b;}
int dx[8]={-1,0,1,0,1,1,-1,-1};
int dy[8]={0,-1,0,1,1,-1,1,-1};
char dir[4]={'u','l','d','r'};
ll cmp1(pair<ll,string>a,pair<ll,string> b){
        if(a.fi!=b.fi)
        return a.fi<b.fi;
        else
        return a.se<b.se;
}
//--------------------------------------------------------------------------

//---------------------------------------------------------------------------
int main(){//問題をちゃんと見ろ!!!!!!!!!!!!!!!!!      llか??????????        memset()!!!!!!!!!!!!       ペナを減らせ!!!!!!!!!!!!!
    cin.tie(0);
    ios::sync_with_stdio(false);
    //-------------------------------
    char a,b;cin>>a>>b;
    if(a==b)
        cout<<'H'<<endl;
    else
        cout<<'D'<<endl'
    //-------------------------------
    return 0;
}
//---------------------------------------------------------------------------






Compiler output:
a.cc:73:24: warning: missing terminating ' character
   73 |         cout<<'D'<<endl'
      |                        ^
a.cc:73:24: error: missing terminating ' character
a.cc: In function 'int main()':
a.cc:73:24: error: expected ';' before 'return'
   73 |         cout<<'D'<<endl'
      |                        ^
      |                        ;
   74 |     //-------------------------------
   75 |     return 0;
      |     ~~~~~~
Language: C++

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

int main(){

  char a, b;
  cin >> a >> b;
  
  if(a == H) cout << b;
	else {
    	if(b == H) cout << 'D' << endl;
      else cout << 'H' << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: 'H' was not declared in this scope
    9 |   if(a == H) cout << b;
      |           ^
Language: C++

#include <iostream>
#include<algorithm>
using namespace std;
int main(void){
string a,b;
cin>>a>>b;
if(a==H) cout<<"H"<<endl;
else(a==D) cout<<"D"<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: 'H' was not declared in this scope
    7 | if(a==H) cout<<"H"<<endl;
      |       ^
a.cc:8:9: error: 'D' was not declared in this scope
    8 | else(a==D) cout<<"D"<<endl;
      |         ^
Language: C

#include<stdio.h>

int main() {
	char a, b;

	scanf_s("%s %s",&a,&b);
	
	if (a=='H'&&b=='H') {
		printf("H");

	}
	else if( a == 'D' && b == 'D') {
		printf("H");

	}
	else {
		printf("D");
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    6 |         scanf_s("%s %s",&a,&b);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include <locale>
using namespace std;
int main(void){
    // Your code here!
    char a,b;
    cin >> a >> b;
    if(a==H){
        cout<< b <<endl;
    }
    else{
        if(b==H){
            cout<< D <<endl;
        }
        else{
            cout<< H <<endl;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: 'H' was not declared in this scope
    8 |     if(a==H){
      |           ^
a.cc:13:20: error: 'D' was not declared in this scope
   13 |             cout<< D <<endl;
      |                    ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string.h>
#include <iomanip>
#include <map>
#include <cstdlib>
#include <cctype>
#include <ctype.h>
#define ll long long
char toupper(char c);
char toupper(char c)
{
    return (c - 0x20);
}

using namespace std;
int main()
{
    char a, b;
    cin >> a >> d;
    if (a == d)
    {
        cout << "H" << endl;
    }
    else
    {
        cout << "D" << endl;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:17: error: 'd' was not declared in this scope
   21 |     cin >> a >> d;
      |                 ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string.h>
#include <iomanip>
#include <map>
#include <cstdlib>
#include <cctype>
#include <ctype.h>
#define ll long long
char toupper(char c);
char toupper(char c)
{
    return (c - 0x20);
}
ll GetDigit(ll num)
{
    char a, d;
    cin >> a >> d;
    if (a == d)
    {
        cout << "H" << endl;
    }
    else
    {
        cout << "D" << endl;
    }
    return 0;
}


Compiler output:
a.cc: In function 'long long int GetDigit(long long int)':
a.cc:19:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   19 |     cin >> a >> d;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:22:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |         cout << "H" << 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:22:24: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   22 |         cout << "H" << endl;
      |                        ^~~~
      |                        std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:26:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   26 |         cout << "D" << 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:26:24: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   26 |         cout << "D" << 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 <vector>
#include <algorithm>
#include <string.h>
#include <iomanip>
#include <map>
#include <cstdlib>
#include <cctype>
#include <ctype.h>
#define ll long long
char toupper(char c);
char toupper(char c)
{
    return (c - 0x20);
}
ll GetDigit(ll num)
{
    char a, b;
    cin >> a >> d;
    if (a == d)
    {
        cout << "H" << endl;
    }
    else
    {
        cout << "D" << endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'long long int GetDigit(long long int)':
a.cc:19:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   19 |     cin >> a >> d;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:19:17: error: 'd' was not declared in this scope
   19 |     cin >> a >> d;
      |                 ^
a.cc:22:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |         cout << "H" << 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:22:24: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   22 |         cout << "H" << endl;
      |                        ^~~~
      |                        std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:26:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   26 |         cout << "D" << 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:26:24: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   26 |         cout << "D" << 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.util.*;

public class Main{

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		Atring b = sc.next();
		
		if(a.equals("H") || b.equals("H")) System.out.println("H");
		if(a.equals("H") || b.equals("D")) System.out.println("D");
		if(a.equals("D") || b.equals("H")) System.out.println("D");
		if(a.equals("D") || b.equals("D")) System.out.println("H");
	}
}

Compiler output:
Main.java:8: error: cannot find symbol
		Atring b = sc.next();
		^
  symbol:   class Atring
  location: class Main
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string a.b;
  cin >> a >> b;
  if(a == b){
    cout << "H" << endl;
  }else{
    cout << "D" << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:11: error: expected initializer before '.' token
    4 |   string a.b;
      |           ^
a.cc:5:10: error: 'a' was not declared in this scope
    5 |   cin >> a >> b;
      |          ^
a.cc:5:15: error: 'b' was not declared in this scope
    5 |   cin >> a >> b;
      |               ^
Language: C++

#include <iostram>
using namespace std;

int main(){
  char a, b;
  cin >> a >> b;
  
  if (a == b) cout << "H" <<endl;
  else cout << "D" << endl;
  
  return 0;
}

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

#include<stdio.h>
main()
{
	char x,y;
scanf("%c %c",&x,&y);
	if(a==b)
printf("H");
	else
printf("D");
	
 }

Compiler output:
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:6:12: error: 'a' was not declared in this scope
    6 |         if(a==b)
      |            ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |         if(a==b)
      |               ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  char a,b;
  cin >> a >> b;
  if (a == H && b == H || a == D && b == D ) cout << 'H' << endl;
  else cout << 'D' << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'H' was not declared in this scope
    6 |   if (a == H && b == H || a == D && b == D ) cout << 'H' << endl;
      |            ^
a.cc:6:32: error: 'D' was not declared in this scope
    6 |   if (a == H && b == H || a == D && b == D ) cout << 'H' << endl;
      |                                ^
Language: C++

#include <vector>
#include <algorithm>
using namespace std;
#define rep(i, n) for (int i = 0; i < n; i++)

int main()
{
	char a, b;

	cin >> a >> b;

	if (((a == 'H') && (b == 'H')) || ((a == 'D') && (b == 'D'))) {
		cout << 'H' << '\n';
	}
	else {
		cout << 'D' << '\n';
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'cin' was not declared in this scope
   10 |         cin >> a >> b;
      |         ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include <algorithm>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:13:17: error: 'cout' was not declared in this scope
   13 |                 cout << 'H' << '\n';
      |                 ^~~~
a.cc:13:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:16:17: error: 'cout' was not declared in this scope
   16 |                 cout << 'D' << '\n';
      |                 ^~~~
a.cc:16:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> b >> endl;

int main() {
    if (a == H && b == H) {cout << "H" << endl;}
    else if (a==H && b==D) {cout << "D" << endl;}
    else if (a==D && b==H) {cout << "D" << endl;}
    else (a==D && b==D) {cout << "H" <<endl;}
  return 0;
}

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> b >> endl;
      | ^~~
a.cc: In function 'int main()':
a.cc:11:24: error: expected ';' before '{' token
   11 |     else (a==D && b==D) {cout << "H" <<endl;}
      |                        ^~
      |                        ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> endl;
cin >> b >> endl;

int main() {
    if (a == H && b == H) {cout << "H" << endl;}
    else if (a==H && b==D) {cout << "D" << endl;}
    else if (a==D && b==H) {cout << "D" << endl;}
    else (a==D && b==D) {cout << "H" <<endl;}
  return 0;
}

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> endl;
      | ^~~
a.cc:6:1: error: 'cin' does not name a type
    6 | cin >> b >> endl;
      | ^~~
a.cc: In function 'int main()':
a.cc:12:24: error: expected ';' before '{' token
   12 |     else (a==D && b==D) {cout << "H" <<endl;}
      |                        ^~
      |                        ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> endl;
cin >> b >> endl;

int main() {
    if (a == H && b == H) cout << "H" << endl;
    else if (a==H && b==D) cout << "D" << endl;
    else if (a==D && b==H) cout << "D" << endl;
    else (a==D && b==D) cout << "H" <<endl;
  return 0;
}

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> endl;
      | ^~~
a.cc:6:1: error: 'cin' does not name a type
    6 | cin >> b >> endl;
      | ^~~
a.cc: In function 'int main()':
a.cc:12:24: error: expected ';' before 'cout'
   12 |     else (a==D && b==D) cout << "H" <<endl;
      |                        ^~~~~
      |                        ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> endl;
cin >> b >> endl;

int main() {
    if (a == H && b == H) cout << "H" << endl;
    else if (a==H && b==D) cout << "D" << endl;
    else if (a==D && b==H) cout << "H" << endl;
    else (a==D && b==D) cout << "H" <<endl;
  return 0;
}

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> endl;
      | ^~~
a.cc:6:1: error: 'cin' does not name a type
    6 | cin >> b >> endl;
      | ^~~
a.cc: In function 'int main()':
a.cc:12:24: error: expected ';' before 'cout'
   12 |     else (a==D && b==D) cout << "H" <<endl;
      |                        ^~~~~
      |                        ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
char cin >> a >> endl;
char cin >> b >> endl;

int main() {
    if (a == H && b == H) cout << "H" << endl;
    else if (a==H && b==D) cout << "D" << endl;
    else if (a==D && b==H) cout << "H" << endl;
    else (a==D && b==D) cout << "H" <<endl;
  return 0;
}

Compiler output:
a.cc:5:10: error: expected initializer before '>>' token
    5 | char cin >> a >> endl;
      |          ^~
a.cc:6:10: error: expected initializer before '>>' token
    6 | char cin >> b >> endl;
      |          ^~
a.cc: In function 'int main()':
a.cc:12:24: error: expected ';' before 'cout'
   12 |     else (a==D && b==D) cout << "H" <<endl;
      |                        ^~~~~
      |                        ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> endl;
cin >> b >> endl;

int main() {
    if (a == H and b == H) cout << "H" << endl;
    else if (a==H and b==D) cout << "D" << endl;
    else if (a==D and b==H) cout << "H" << endl;
    else (a==D and b==D) cout << "H" <<endl;
  return 0;
}

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> endl;
      | ^~~
a.cc:6:1: error: 'cin' does not name a type
    6 | cin >> b >> endl;
      | ^~~
a.cc: In function 'int main()':
a.cc:12:25: error: expected ';' before 'cout'
   12 |     else (a==D and b==D) cout << "H" <<endl;
      |                         ^~~~~
      |                         ;
Language: C++

#include<iostream>
using namespace std;

char H, D, a, b;
cin >> a >> endl;
cin >> b >> endl;

if (a == H and b == H) cout << "H" << endl;
else if (a==H and b==D) cout << "D" << endl;
else if (a==D and b==H) cout << "H" << endl;
else (a==D and b==D) cout << "H" <<endl;

Compiler output:
a.cc:5:1: error: 'cin' does not name a type
    5 | cin >> a >> endl;
      | ^~~
a.cc:6:1: error: 'cin' does not name a type
    6 | cin >> b >> endl;
      | ^~~
a.cc:8:1: error: expected unqualified-id before 'if'
    8 | if (a == H and b == H) cout << "H" << endl;
      | ^~
a.cc:9:1: error: expected unqualified-id before 'else'
    9 | else if (a==H and b==D) cout << "D" << endl;
      | ^~~~
a.cc:10:1: error: expected unqualified-id before 'else'
   10 | else if (a==D and b==H) cout << "H" << endl;
      | ^~~~
a.cc:11:1: error: expected unqualified-id before 'else'
   11 | else (a==D and b==D) cout << "H" <<endl;
      | ^~~~
Language: C++

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

int main() {
  char a, b; cin >> a >> b;
  cout << (a == b ? 'H' : 'D') << '\n';
}

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(){
  char A,B;
  cin>>A>>B;
  if(A='H' && B='H') {
     cout<<"H"<<endl;
  }
  if(A='D' && B='D') {
     cout<<"H"<<endl;
  }
  if(A='H' && B='D') {
     cout<<"D"<<endl;
  }
  if(A='D' && B='H') {
     cout<<"D"<<endl;
  }
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: lvalue required as left operand of assignment
    7 |   if(A='H' && B='H') {
      |        ~~~~^~~~
a.cc:10:12: error: lvalue required as left operand of assignment
   10 |   if(A='D' && B='D') {
      |        ~~~~^~~~
a.cc:13:12: error: lvalue required as left operand of assignment
   13 |   if(A='H' && B='D') {
      |        ~~~~^~~~
a.cc:16:12: error: lvalue required as left operand of assignment
   16 |   if(A='D' && B='H') {
      |        ~~~~^~~~
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a[0]==b[0])? cout<<"H":cout<<"D"
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:36: error: expected ';' before 'return'
    9 |   (a[0]==b[0])? cout<<"H":cout<<"D"
      |                                    ^
      |                                    ;
   10 | 
   11 |   return 0;
      |   ~~~~~~
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a[0]=='H' && b[0]=='H')? cout<<"H":cout<<"D"
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:48: error: expected ';' before 'return'
    9 |   (a[0]=='H' && b[0]=='H')? cout<<"H":cout<<"D"
      |                                                ^
      |                                                ;
   10 | 
   11 |   return 0;
      |   ~~~~~~
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a[0]='H' && b[0]='H')? cout<<"H":cout<<"D"
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: lvalue required as left operand of assignment
    9 |   (a[0]='H' && b[0]='H')? cout<<"H":cout<<"D"
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a="H" && b="H")? cout<<"H":cout<<"D"
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: no match for 'operator&&' (operand types are 'const char [2]' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    9 |   (a="H" && b="H")? cout<<"H":cout<<"D"
      |      ~~~ ^~ ~
      |      |      |
      |      |      std::string {aka std::__cxx11::basic_string<char>}
      |      const char [2]
a.cc:9:10: note: candidate: 'operator&&(bool, bool)' (built-in)
    9 |   (a="H" && b="H")? cout<<"H":cout<<"D"
      |      ~~~~^~~~
a.cc:9:10: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'bool'
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a='H' & b='H')? cout<<"H":cout<<"D"
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: no match for 'operator&' (operand types are 'char' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    9 |   (a='H' & b='H')? cout<<"H":cout<<"D"
      |      ~~~ ^ ~
      |      |     |
      |      char  std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/ios_base.h:84:3: note: candidate: 'constexpr std::_Ios_Fmtflags std::operator&(_Ios_Fmtflags, _Ios_Fmtflags)'
   84 |   operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:84:46: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'std::_Ios_Fmtflags'
   84 |   operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b) _GLIBCXX_NOTHROW
      |                                ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/ios_base.h:134:3: note: candidate: 'constexpr std::_Ios_Openmode std::operator&(_Ios_Openmode, _Ios_Openmode)'
  134 |   operator&(_Ios_Openmode __a, _Ios_Openmode __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:134:46: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'std::_Ios_Openmode'
  134 |   operator&(_Ios_Openmode __a, _Ios_Openmode __b) _GLIBCXX_NOTHROW
      |                                ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/ios_base.h:181:3: note: candidate: 'constexpr std::_Ios_Iostate std::operator&(_Ios_Iostate, _Ios_Iostate)'
  181 |   operator&(_Ios_Iostate __a, _Ios_Iostate __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:181:44: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'std::_Ios_Iostate'
  181 |   operator&(_Ios_Iostate __a, _Ios_Iostate __b) _GLIBCXX_NOTHROW
      |                               ~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/14/bits/memory_resource.h:38,
                 from /usr/include/c++/14/string:68,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41:
/usr/include/c++/14/cstddef:141:3: note: candidate: 'constexpr std::byte std::operator&(byte, byte)'
  141 |   operator&(byte __l, byte __r) noexcept
      |   ^~~~~~~~
/usr/include/c++/14/cstddef:141:18: note:   no known conversion for argument 1 from 'char' to 'std::byte'
  141 |   operator&(byte __l, byte __r) noexcept
      |             ~~~~~^~~
Language: C++

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

int main(){
  string a,b;
  cin>>a>>b;
  (a='H' && b='H')? cout<<"H":cout<<"D"
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: no match for 'operator&&' (operand types are 'char' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    9 |   (a='H' && b='H')? cout<<"H":cout<<"D"
      |      ~~~ ^~ ~
      |      |      |
      |      char   std::string {aka std::__cxx11::basic_string<char>}
a.cc:9:10: note: candidate: 'operator&&(bool, bool)' (built-in)
    9 |   (a='H' && b='H')? cout<<"H":cout<<"D"
      |      ~~~~^~~~
a.cc:9:10: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'bool'
Language: C++

#include<iostream>
using namespace std;
int main() {
  std::string a,b;
  cin >> a >> b;
  if (a=="H") {
  	if (b=="H") cout << "H" << endl;;
    else cout << "D" << endl;;
  }
  else {
  	if (b=="H") cout << "D" << endl;;
    else cout << "H" << endl;;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected '}' before 'else'
    8 |     else cout << "D" << endl;;
      |     ^~~~
a.cc:6:15: note: to match this '{'
    6 |   if (a=="H") {
      |               ^
a.cc: At global scope:
a.cc:10:3: error: expected unqualified-id before 'else'
   10 |   else {
      |   ^~~~
a.cc:14:1: error: expected declaration before '}' token
   14 | }
      | ^
Language: C++

#include<stdio.h>

int main(){
	char a, b;
	scanf("%c %c", &a, &b);
	if(a==b) printf("H\n");
	else printf("D\n")
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: expected ';' before 'return'
    7 |         else printf("D\n")
      |                           ^
      |                           ;
    8 |         return 0;
      |         ~~~~~~
Language: C++

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

int main() {
  string a,b;
  cin >> a >> b;
  if(a=="H"){
    if(b=="H"){
      cout << "H" << endl;
    }
    else{
      cout << "D" << endl;
    }
  }
  else{
    if(B=="H"){
      cout << "D" << endl;
    }
    else{
      cout << "H" << endl;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:8: error: 'B' was not declared in this scope
   16 |     if(B=="H"){
      |        ^
Language: C++

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

int main(){
  char a,b;
  cin >> a >> b;
  if(a=='H'){
    cout << "H" << endl;
  }else if(a=='D'){
     if(b=='H'){
       cout << "D" << endl;
     }else(b=='H'){
       cour << "H" << endl;
     }}
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: expected ';' before '{' token
   12 |      }else(b=='H'){
      |                   ^
      |                   ;
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); ++i)
typedef long long ll;
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1;} return 0;}
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1;} return 0;}
const ll INF = 1LL << 60;

int main(){
	char a, b; cin >> a >>b;
	if(a == 'H') puts(b);
	else {
		if(b == 'H') puts('D');
		else puts('H');
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:27: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
   11 |         if(a == 'H') puts(b);
      |                           ^
      |                           |
      |                           char
In file included from /usr/include/c++/14/cstdio:42,
                 from /usr/include/c++/14/ext/string_conversions.h:45,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/stdio.h:714:30: note:   initializing argument 1 of 'int puts(const char*)'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
a.cc:13:35: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
   13 |                 if(b == 'H') puts('D');
      |                                   ^~~
      |                                   |
      |                                   char
/usr/include/stdio.h:714:30: note:   initializing argument 1 of 'int puts(const char*)'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
a.cc:14:27: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
   14 |                 else puts('H');
      |                           ^~~
      |                           |
      |                           char
/usr/include/stdio.h:714:30: note:   initializing argument 1 of 'int puts(const char*)'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
  char a, b;
  cin >> a >> b;
  
  bool atco, tpco;
  if(a == 'H') atco = true;
  else atco = false;
  if(b == "H") tpco = true;
  else tpco = false;
  
  if(atco == tpco) cout << 'H';
  else cout << 'D';
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:8: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   13 |   if(b == "H") tpco = true;
      |      ~~^~~~~~
Language: C++

#include<iostream>
using namespace std;
int main(){
	char a,b;
	cin>>a>>b;
  	char hd[2]=['H','D'];
  	cout<<(a=='H'?b:hd[abs((b=='D')-1)] )<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:21: error: expected identifier before 'H'
    6 |         char hd[2]=['H','D'];
      |                     ^~~
a.cc:6:24: error: expected ']' before ',' token
    6 |         char hd[2]=['H','D'];
      |                        ^
      |                        ]
a.cc: In lambda function:
a.cc:6:24: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:6:20: error: array must be initialized with a brace-enclosed initializer
    6 |         char hd[2]=['H','D'];
      |                    ^~~~
a.cc:6:25: error: expected unqualified-id before 'D'
    6 |         char hd[2]=['H','D'];
      |                         ^~~
Language: C++

int main() {
    char a, b;
    cin >> a >> b;
    if (a == 'H') cout << b << endl;
    else {
        if (b == 'H') cout << 'D' << endl;
        else cout << 'H' << endl;
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> a >> b;
      |     ^~~
a.cc:4:19: error: 'cout' was not declared in this scope
    4 |     if (a == 'H') cout << b << endl;
      |                   ^~~~
a.cc:4:32: error: 'endl' was not declared in this scope
    4 |     if (a == 'H') cout << b << endl;
      |                                ^~~~
a.cc:6:23: error: 'cout' was not declared in this scope
    6 |         if (b == 'H') cout << 'D' << endl;
      |                       ^~~~
a.cc:6:38: error: 'endl' was not declared in this scope
    6 |         if (b == 'H') cout << 'D' << endl;
      |                                      ^~~~
a.cc:7:14: error: 'cout' was not declared in this scope
    7 |         else cout << 'H' << endl;
      |              ^~~~
a.cc:7:29: error: 'endl' was not declared in this scope
    7 |         else cout << 'H' << endl;
      |                             ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  char a, b;
  cin >> a >> b;
  if ((a == "H" && b == "H") || (a == "D" && b == "D")) {
    cout << "H" << endl;
  }
  else {
    cout << "D" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:10: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if ((a == "H" && b == "H") || (a == "D" && b == "D")) {
      |        ~~^~~~~~
a.cc:6:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if ((a == "H" && b == "H") || (a == "D" && b == "D")) {
      |                    ~~^~~~~~
a.cc:6:36: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if ((a == "H" && b == "H") || (a == "D" && b == "D")) {
      |                                  ~~^~~~~~
a.cc:6:48: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if ((a == "H" && b == "H") || (a == "D" && b == "D")) {
      |                                              ~~^~~~~~
Language: C++

#include"stdio.h"

int main (){
	char a, b;
	scanf("%c %c", &a, &b);getchar();
	if(a=='H' && b=='H')||(a=='D' && b=='D')
	{
		puts("H");
	}
	else
	{
		puts("D");
	}
	
	
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:29: error: expected primary-expression before '||' token
    6 |         if(a=='H' && b=='H')||(a=='D' && b=='D')
      |                             ^~
Language: C++

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

const int MOD = 1000000007;
const int INF = 1e9;

//long long
using ll = long long;

//出力系
#define print(x) cout << x << endl
#define yes cout << "Yes" << endl
#define YES cout << "YES" << endl
#define no cout << "No" << endl
#define NO cout << "NO" << endl
 
// begin() end()
#define all(x) (x).begin(),(x).end()

//for
#define REP(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define REPR(i,n) for(int i=n, i##_len=(n); i>=0; i--)
#define FOR(i,a,b) for(int i=(a), i##_len=(b); i<i##_len; ++i)

//最大公約数 
 ll gcd(ll a,ll b){
 if(b == 0) return a;
 return gcd(b,a%b);
 }

//最小公倍数
 ll lcm(ll a,ll b){
 ll g = gcd(a,b);
 return a / g * b; // Be careful not to overflow  if(a < b) return gcd(b, a);
  unsigned r;
  while ((r=a%b)) {
    a = b;
    b = r;
  }
  return b;
} 




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

if(a == b) print("H");
else print("D");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:47:1: error: 'chat' was not declared in this scope; did you mean 'char'?
   47 | chat a, b;
      | ^~~~
      | char
a.cc:48:8: error: 'a' was not declared in this scope
   48 | cin >> a >> b;
      |        ^
a.cc:48:13: error: 'b' was not declared in this scope
   48 | cin >> a >> b;
      |             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
    string a, b;
    cin >> a >> b;
    
    if (a == H && b == H){
        cout << "H" << endl;
    } 
    else if (a == H && b == D){
        cout << "D" << endl;
    }
    else if (a == D && b == H){
        cout << "D" << endl;
    }
    else {
        cout << "H" << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'H' was not declared in this scope
    8 |     if (a == H && b == H){
      |              ^
a.cc:11:29: error: 'D' was not declared in this scope
   11 |     else if (a == H && b == D){
      |                             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int a,b;
  cin >> a >> b;
  if((a=="H"&&b=="H")||(a=="D"&&b=="D")){
    cout << "H" << endl;
  }else{
    cout << "D" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if((a=="H"&&b=="H")||(a=="D"&&b=="D")){
      |       ~^~~~~
a.cc:6:16: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if((a=="H"&&b=="H")||(a=="D"&&b=="D")){
      |               ~^~~~~
a.cc:6:26: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if((a=="H"&&b=="H")||(a=="D"&&b=="D")){
      |                         ~^~~~~
a.cc:6:34: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |   if((a=="H"&&b=="H")||(a=="D"&&b=="D")){
      |                                 ~^~~~~
Language: C++

	 # include <bits/stdc++.h>
  using namespace std;
  int main() {
      char a, b; cin >> a >> b;
   
      char ans[2] = {'D', 'H'};
      
      std::random_device rnd;
      std::mt19937 mt(rnd());
      std::uniform_int_distribution<> rand2bit(0, 1);
   
   	char ans[2] = {'D', 'H'};
      cout << ans[rand2bit(mt)] << endl;
      
      return 0;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:12:14: error: redeclaration of 'char ans [2]'
   12 |         char ans[2] = {'D', 'H'};
      |              ^~~
a.cc:6:12: note: 'char ans [2]' previously declared here
    6 |       char ans[2] = {'D', 'H'};
      |            ^~~
Language: C++

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

int main()
{

    int X;
    cint >> X;

    int count = 0;
    int ans = 0;

    vector<int> vec;
    for (int i = 0; i < X + 1; i++)
    {
        vec;
    }

    for (int i = 0; size.vec(); i++)
    {
        ans++;
        count++;
        if (X < count + i + 1)
        {
            break
        }
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'cint' was not declared in this scope; did you mean 'uint'?
    8 |     cint >> X;
      |     ^~~~
      |     uint
a.cc:19:26: error: overloaded function with no contextual type information
   19 |     for (int i = 0; size.vec(); i++)
      |                          ^~~
a.cc:25:18: error: expected ';' before '}' token
   25 |             break
      |                  ^
      |                  ;
   26 |         }
      |         ~
Language: C++

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

int main() {
  string a, b;
  cin >> a >> b;
  
  if (a = b) { 
    cout << "H" << endl;
  }
  else {
    cout << "D" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: could not convert 'a.std::__cxx11::basic_string<char>::operator=(b)' from 'std::__cxx11::basic_string<char>' to 'bool'
    8 |   if (a = b) {
      |       ~~^~~
      |         |
      |         std::__cxx11::basic_string<char>
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    char a, b;
    cin >> a >> b;
    sort(a, a+3);
    if(a=='H'){
        cout << "H" << endl;
    }else{
        if(b=='H'){
            cout << "D" << endl;
        }else{
            cout << "H" << endl;
        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: no matching function for call to 'sort(char&, int)'
    6 |     sort(a, a+3);
      |     ~~~~^~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:4762:5: note: candidate: 'template<class _RAIter> void std::sort(_RAIter, _RAIter)'
 4762 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4762:5: note:   template argument deduction/substitution failed:
a.cc:6:9: note:   deduced conflicting types for parameter '_RAIter' ('char' and 'int')
    6 |     sort(a, a+3);
      |     ~~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4793:5: note: candidate: 'template<class _RAIter, class _Compare> void std::sort(_RAIter, _RAIter, _Compare)'
 4793 |     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
      |     ^~~~
/usr/include/c++/14/bits/stl_algo.h:4793:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator, _Compare)'
  292 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:292:1: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note: candidate: 'template<class _ExecutionPolicy, class _RandomAccessIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, void> std::sort(_ExecutionPolicy&&, _RandomAccessIterator, _RandomAccessIterator)'
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:296:1: note:   candidate expects 3 arguments, 2 provided
Language: C++

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

int main(){
  string A, B;
  cin >> A >> B;
  if(A == B){
    cout << "H";
  } else {
    cout << "D";
  }
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:5:3: error: 'string' was not declared in this scope
    5 |   string A, B;
      |   ^~~~~~
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> 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;
      |               ^
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout << "H";
      |     ^~~~
a.cc:10:5: error: 'cout' was not declared in this scope
   10 |     cout << "D";
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string S,s;
  cin>>S>>s;
  if(S==s){
    cout<<"H"<<endl;
  }else
      cout<<"D"<<endl;
    }
}
    

Compiler output:
a.cc:12:1: error: expected declaration before '}' token
   12 | }
      | ^
Language: C++

#include<bitss/stdc++.h>
using nmespace std;
int main()
{
  char a,b;
  cin >> a >> b;
  if(a=='H' && b=='H')
    cout << "H" << endl;
  else if(a=='D' && b=='H')
    cout << "D" << endl;
  else if(a=='H' && b=='D')
    cout << "D" << endl;
  else if(a=='D' && b=='D')
    cout << "H" << endl;
}

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

#include<bits/stdc++.h>
using namespace std;
int main(){
 char a,b;
//scanf("%c%c",&a &b);
cin>>a>>b;
if(a==b){
//printf("H");
cout<<"H";
}
else{
//printf("D");
cout<<"D";
}
]

Compiler output:
a.cc: In function 'int main()':
a.cc:15:1: error: expected primary-expression before ']' token
   15 | ]
      | ^
a.cc:15:2: error: expected '}' at end of input
   15 | ]
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
int main()
{ 
char a,b;
cin>>a>>b;
if(a==b)
{
    puts("H");
return 0;
}
puts("D");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 | cin>>a>>b;
      | ^~~
      | std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

#include<iostream>
using namespace std;
int main(){
	char a,b;
	cin>>a>>b;
	while((a=="H" || a=="D") && (b=="H" || b=="D")){
		continue;
	}
		if(a==b){
		cout<<"H\n";
		cout<<"In this input, AtCoDeer is honest. Hence, as he says, TopCoDeer is honest.\n";
		}
		
		else{
		cout<<"D\n";
		cout<<"In this input, AtCoDeer is dishonest. Hence, contrary to what he says, TopCoDeer is dishonest.\n";
		}
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |         while((a=="H" || a=="D") && (b=="H" || b=="D")){
      |                ~^~~~~
a.cc:6:27: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |         while((a=="H" || a=="D") && (b=="H" || b=="D")){
      |                          ~^~~~~
a.cc:6:39: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |         while((a=="H" || a=="D") && (b=="H" || b=="D")){
      |                                      ~^~~~~
a.cc:6:49: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |         while((a=="H" || a=="D") && (b=="H" || b=="D")){
      |                                                ~^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  char a,b;
  cin >>a >>b;
  if(a =='H'){
    if(b =='H'){
      cout << 'H' <<endl;
    }
    else if(b=='D'){
      cout <<'D' <<endl;
    }
  }
  if(a =='D'){
    if(b =='H'){
      cout << 'D' <<endl;
    }
    else if(b=='D'){
      cout <<'H' <<endl;
    }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:22:4: error: expected '}' at end of input
   22 |   }
      |    ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
	if(a=='H',b=='H')
		cout<<'H';
	if(a=='H',b=='D')
		cout<<'D';
	if(a=='D',b=='H')
		cout<<'D';
	if (a=='D',b=='D')
	cout<<'H';
}
		

Compiler output:
a.cc: In function 'int main()':
a.cc:4:12: error: 'a' was not declared in this scope
    4 |         if(a=='H',b=='H')
      |            ^
a.cc:4:19: error: 'b' was not declared in this scope
    4 |         if(a=='H',b=='H')
      |                   ^
a.cc:6:12: error: 'a' was not declared in this scope
    6 |         if(a=='H',b=='D')
      |            ^
a.cc:6:19: error: 'b' was not declared in this scope
    6 |         if(a=='H',b=='D')
      |                   ^
a.cc:8:12: error: 'a' was not declared in this scope
    8 |         if(a=='D',b=='H')
      |            ^
a.cc:8:19: error: 'b' was not declared in this scope
    8 |         if(a=='D',b=='H')
      |                   ^
a.cc:10:13: error: 'a' was not declared in this scope
   10 |         if (a=='D',b=='D')
      |             ^
a.cc:10:20: error: 'b' was not declared in this scope
   10 |         if (a=='D',b=='D')
      |                    ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
char a,b;cin>>a>>b;
if(a==b)
cout<<char(h-32);
if(a!=b)
cout<<char(d-32);

return 0;}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: 'h' was not declared in this scope
    6 | cout<<char(h-32);
      |            ^
a.cc:8:12: error: 'd' was not declared in this scope
    8 | cout<<char(d-32);
      |            ^
Language: C++

int main (){
	char a,b;
	cin>>a>>b;
	if(a=='H'&&b=='H')
      {
	    cout<<"H";
      }
     	if(a=='D'&&b=='H')
       	  { 
       	  cout<<"D";
          }     	
            if(a=='H'&&b=='D')
			 {
			cout<<"D"; 	
		 } 
		    if(a=='D'&&b=='D')
		       { 
		       cout<<"H";
		       
		       	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:9: error: 'cin' was not declared in this scope
    3 |         cin>>a>>b;
      |         ^~~
a.cc:6:13: error: 'cout' was not declared in this scope
    6 |             cout<<"H";
      |             ^~~~
a.cc:10:11: error: 'cout' was not declared in this scope
   10 |           cout<<"D";
      |           ^~~~
a.cc:14:25: error: 'cout' was not declared in this scope
   14 |                         cout<<"D";
      |                         ^~~~
a.cc:18:24: error: 'cout' was not declared in this scope
   18 |                        cout<<"H";
      |                        ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
	char answer,a,b;
	cin >> a, b;
	if (a=='H') {
		if (b == 'H') {
			answer = 'H';
		}
		else {
			answer = 'D';
		}
	}
	else{
		if(b=='D'){
		answer = 'H';
	}
	else {
		answer = 'D';
	}
	cout << answer << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:2: error: expected '}' at end of input
   23 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^