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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    8 |         if (a == "H")
      |             ~~^~~~~~
a.cc:10:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   10 |         else if (b == "H")
      |                  ~~^~~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    8 |   if(b=="H")cout << a << endl;
      |      ~^~~~~
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 {
        cout << "H" << endl;;
      }
    } else {
      if (b == 'H') {
          cout << "D" << endl;
      } else {
        cout << "H" << endl;;
      }
    }
}


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

#include <iostream>

using namespace std;


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


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

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

#define ll long long

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

Compiler output:
a.cc: In function 'int main()':
a.cc:10:87: error: expected ';' before '}' token
   10 |   cout << (a=='H'&& b=='H' ? 'H': a=='H'&& b=='D' ? 'D' : a=='D'&& b=='H' ? 'D' : 'H')
      |                                                                                       ^
      |                                                                                       ;
   11 | }
      | ~
Language: C++

#include <bits/stdc++.h>
#define rep(i,N) for (int i = 0; i < (N); ++i)
#define all(v) v.begin(), v.end()
using namespace std;
using ll = long long;
using P = pair<int, int>;
int main(void){
  int 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 if (a == 'D' && b == 'D')
    cout << 'H' << endl;
  }
}


Compiler output:
a.cc:20:1: error: expected declaration before '}' token
   20 | }
      | ^
Language: C++

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

//type
#define ll long long
typedef pair<int, int> P;
//定数
#define INF 1000000000000 //10^12:∞
#define MOD 1000000007    //10^9+7:合同式の法
#define MAXR 100000       //10^5:配列の最大のrange
//略記
#define PB push_back //挿入
#define MP make_pair //pairのコンストラクタ
#define F first      //pairの一つ目の要素
#define S second     //pairの二つ目の要素
#define Z class
// OTHER
// xの二乗を返す (関数テンプレート版)
template <typename T>
T square(T x) { return x * x; }
template <class T>
T GCD(T a, T b)
{
  T r;
  while (a)
    r = b, b = a, a = r % a;
  return b;
}
template <class T>
T LCM(T a, T b) { return a / GCD(a, b) * b; }

#define chmax(x, y) (x = max(x, y))
#define chmin(x, y) (x = min(x, y))
// loop
#define rep(i, n) for (int i = 0; i < (n); i++)
#define repd(i, n) for (ll i = n - 1; i >= 0; i--)
#define FOR(i, a, b) for (ll i = a; i <= (b); i++)
#define FORD(i, a, b) for (ll i = a; i >= (b); i--)
#define FORA(i, I) for (const auto &i : I)

// vector
#define ALL(x) x.begin(), x.end()

// output
#define YES() printf("YES\n")
#define NO() printf("NO\n")
#define isYES(x) printf("%s\n", (x) ? "YES" : "NO")
#define Yes() printf("Yes\n")
#define No() printf("No\n")
#define ln cout << '\n'
template <Z A>
void pr(A a)
{
  cout << a;
  ln;
}
template <Z A, Z B>
void pr(A a, B b)
{
  cout << a << ' ';
}

int ans = 0;
bool check = 0;
string s, t;
int N = 3;
vector<int> v(N);
int a, b, c, d, n;
int x, y;
char ch;

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

int main()
{
  char a, b;
  cin >> a >> b;
  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';
  return 0;
}


Compiler output:
a.cc:81:12: error: extended character ’ is not valid in an identifier
   81 |   if (a == ’H ’ && b == 'D')
      |            ^
a.cc:81:15: error: extended character ’ is not valid in an identifier
   81 |   if (a == ’H ’ && b == 'D')
      |               ^
a.cc: In function 'int main()':
a.cc:81:12: error: '\U00002019H' was not declared in this scope
   81 |   if (a == ’H ’ && b == 'D')
      |            ^~
a.cc:81:14: error: expected ')' before '\U00002019'
   81 |   if (a == ’H ’ && b == 'D')
      |      ~       ^~
      |              )
Language: C++

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

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:6: error: expected ';' before 'a'
    6 |   cin a >> b ;
      |      ^~
      |      ;
a.cc:12:12: error: expected ';' before '}' token
   12 |     c = 'D'
      |            ^
      |            ;
   13 |     }else c='H'
      |     ~       
a.cc:13:16: error: expected ';' before '}' token
   13 |     }else c='H'
      |                ^
      |                ;
   14 |   }
      |   ~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:1: error: expected primary-expression before '}' token
   13 | }
      | ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:39: error: expected ';' before ':' token
    6 |   cout << (a == b ? 'H' : 'D') << endl:
      |                                       ^
      |                                       ;
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
       Scanner sc = new Scanner(System.in);

	  int a = sc.nextInt();
      int b = sc.nextInt();
      
		if(a.equals(b)){
        	 System.out.println("H");
    	}else{
         	System.out.println("D");
    	}
    }
}

Compiler output:
Main.java:9: error: int cannot be dereferenced
		if(a.equals(b)){
		    ^
1 error
Language: C++

#include <iostream>
#include <string>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:20:2: error: expected '}' at end of input
   20 | }
      |  ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

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

int main(){
  char 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:8:13: error: 'H' was not declared in this scope
    8 |     cout << H << endl;
      |             ^
a.cc:11:13: error: 'D' was not declared in this scope
   11 |     cout << D << endl;
      |             ^
Language: C++

#include <iostream>
using namespace std;
int main(void){
    int a, b;
    cin >> a >> b;
    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:6:11: error: 'H' was not declared in this scope
    6 |     if(a==H,b==D)
      |           ^
a.cc:6:16: error: 'D' was not declared in this scope
    6 |     if(a==H,b==D)
      |                ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: 'H' was not declared in this scope
    8 |     else if(a==H,b==D)
      |                ^
a.cc:8:21: error: 'D' was not declared in this scope
    8 |     else if(a==H,b==D)
      |                     ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: 'H' was not declared in this scope
    8 |     else if(a==H,b==D)
      |                ^
a.cc:8:21: error: 'D' was not declared in this scope
    8 |     else if(a==H,b==D)
      |                     ^
a.cc:11:9: error: expected '(' before 'cout'
   11 |         cout << "D" << endl;
      |         ^~~~
      |         (
Language: C++

#include<iostream>
#include<bits/stdc++.h>


using namespace std;

int main()
{
    int a,b;

    cin >> a >> b;

    if(a == "H") 
    {
        if(b == "H")
        {
            cout << "H";
        }

        else
        {
            cout << "D";
        }
        
    }

    else
    {
        if(b == "H")
        {
            cout << "D";
        }

        else
        {
            cout << "H";
        }
        
    }
    
}



Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   13 |     if(a == "H")
      |        ~~^~~~~~
a.cc:15:14: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   15 |         if(b == "H")
      |            ~~^~~~~~
a.cc:29:14: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   29 |         if(b == "H")
      |            ~~^~~~~~
Language: C

#include<stdio.h>

int main()
{
 char a,b;

 scanf("%c%c",&a,&b);

 if(a=='H')printf("%c\n",b);
 else if((a=='D')&&(b=='H'))printf("D\n");
 else if((a=='D')&&(b=='D'))printf("H\n");

 retunr 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:2: error: 'retunr' undeclared (first use in this function)
   13 |  retunr 0;
      |  ^~~~~~
main.c:13:2: note: each undeclared identifier is reported only once for each function it appears in
main.c:13:8: error: expected ';' before numeric constant
   13 |  retunr 0;
      |        ^~
      |        ;
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: expected '}' before 'else'
    9 |   else{
      |   ^~~~
a.cc:7:11: note: to match this '{'
    7 |   if(a==b){
      |           ^
Language: Java

import java.util.*;

public class Main{
	
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
  	char a=sc.next().charAt(0),b=sc.next().charAt(0);
    int na=0;nb=0;
    if(a=='H'){
      na=1;
    }else{na=-1;}
    if(b=='D'){
      nb=1;
    }else{nb=-1;}
    if(a*b>0){
      System.out.println('H');
    }else{
      System.out.println('D');
    }
  }
}


Compiler output:
Main.java:8: error: cannot find symbol
    int na=0;nb=0;
             ^
  symbol:   variable nb
  location: class Main
Main.java:13: error: cannot find symbol
      nb=1;
      ^
  symbol:   variable nb
  location: class Main
Main.java:14: error: cannot find symbol
    }else{nb=-1;}
          ^
  symbol:   variable nb
  location: class Main
3 errors
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vec;
typedef vector<vec> mat;
typedef pair<ll,ll> pll;
const ll mod=1e9+7;
//const ll mod=998244353;
const ll inf=1LL<<61;

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:14:40: error: expected ';' before '{' token
   14 |   if((a=='H'&&b=='H'||(a=='D'&&b=='D')) {
      |                                        ^~
      |                                        ;
a.cc:17:3: error: expected primary-expression before 'else'
   17 |   else cout << "D" << endl;
      |   ^~~~
a.cc:16:4: error: expected ')' before 'else'
   16 |   }
      |    ^
      |    )
   17 |   else cout << "D" << endl;
      |   ~~~~
a.cc:14:5: note: to match this '('
   14 |   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;
	if (a == 'H' && b== 'H') {
		cout << "H" << endl;
	} else if (a=='H' && b=='D')
		cout << 'D' << endl;
	else if (b == 'D' && b == 'D')
		cout << 'H' << endl;
	else if (b == 'D' && b == 'H')
		cout << 'D' << endl
	else assert(false);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:36: error: expected ';' before 'else'
   15 |                 cout << 'D' << endl
      |                                    ^
      |                                    ;
   16 |         else assert(false);
      |         ~~~~
Language: C++

include <bits/stdc++.h>
using namespace std;
 
#define ll long long int
#define rep(i, n) for(int i = 0; i < n; i++)
#define sort(v) sort((v).begin(), (v).end())
using vi = vector<int>;
const int MOD = 1e9+7;
 
bool IsPrime(int num){
    if (num < 2) return false;
    else if (num == 2) return true;
    else if (num % 2 == 0) return false; // 偶数はあらかじめ除く
    double sqrtNum = sqrt(num);
    for (int i = 3; i <= sqrtNum; i += 2) { if (num % i == 0) return false; }
    return true;
}
 
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:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc:7:12: error: 'vector' does not name a type
    7 | using vi = vector<int>;
      |            ^~~~~~
a.cc: In function 'bool IsPrime(int)':
a.cc:14:22: error: 'sqrt' was not declared in this scope; did you mean 'sort'?
   14 |     double sqrtNum = sqrt(num);
      |                      ^~~~
      |                      sort
a.cc: In function 'int main()':
a.cc:20:9: error: 'string' was not declared in this scope
   20 |         string a,b;
      |         ^~~~~~
a.cc:21:9: error: 'cin' was not declared in this scope
   21 |         cin >> a,b;
      |         ^~~
a.cc:21:16: error: 'a' was not declared in this scope
   21 |         cin >> a,b;
      |                ^
a.cc:21:18: error: 'b' was not declared in this scope
   21 |         cin >> a,b;
      |                  ^
a.cc:22:30: error: 'cout' was not declared in this scope
   22 |         if(a == "H"&&b=="H") cout<<"H"<<endl;
      |                              ^~~~
a.cc:22:41: error: 'endl' was not declared in this scope
   22 |         if(a == "H"&&b=="H") cout<<"H"<<endl;
      |                                         ^~~~
a.cc:23:35: error: 'cout' was not declared in this scope
   23 |         else if(a == "H"&&b=="D") cout<<"D"<<endl;
      |                                   ^~~~
a.cc:23:46: error: 'endl' was not declared in this scope
   23 |         else if(a == "H"&&b=="D") cout<<"D"<<endl;
      |                                              ^~~~
a.cc:24:35: error: 'cout' was not declared in this scope
   24 |         else if(a == "D"&&b=="H") cout<<"D"<<endl;
      |                                   ^~~~
a.cc:24:46: error: 'endl' was not declared in this scope
   24 |         else if(a == "D"&&b=="H") cout<<"D"<<endl;
      |                                              ^~~~
a.cc:25:14: error: 'cout' was not declared in this scope
   25 |         else cout<<"H"<<endl;
      |              ^~~~
a.cc:25:25: error: 'endl' was not declared in this scope
   25 |         else cout<<"H"<<endl;
      |                         ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define PI 3.14159265358979323846
constexpr int INF = numeric_limits<int>::max() / 2;
constexpr long long INFL = numeric_limits<long long>::max() / 2;
constexpr int MOD = 1000000007;
using Graph = vector<vector<int>>;



int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    char 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:18:15: error: expected ';' before 'cout'
   18 |     if((a==b ) cout << 'H' << endl;
      |               ^~~~~
      |               ;
a.cc:19:5: error: expected primary-expression before 'else'
   19 |     else cout << 'D' << endl;
      |     ^~~~
a.cc:18:36: error: expected ')' before 'else'
   18 |     if((a==b ) cout << 'H' << endl;
      |       ~                            ^
      |                                    )
   19 |     else cout << 'D' << endl;
      |     ~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:18:4: error: expected '}' at end of input
   18 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: Java

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

        if(a.equals("H")){
            System.out.println(b);
            
        }
        if(a.equals("D") && b.equals("D")){
            System.out.println("E");
        }
        if(a.equals("D") && b.equals("E")){
            System.out.println("D");
        }
    }

}


Compiler output:
Main.java:5: error: incompatible types: int cannot be converted to String
        String a = sc.nextInt();
                             ^
Main.java:6: error: incompatible types: int cannot be converted to String
        String b = sc.nextInt();
                             ^
2 errors
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main() {
  char a, b; cin >> a >> b; map<char, char> d; d['H'] = 'D'; d[D] = 'H';
  cout << ((a == 'H') ? b : d.at(b)) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:64: error: 'D' was not declared in this scope
    4 |   char a, b; cin >> a >> b; map<char, char> d; d['H'] = 'D'; d[D] = 'H';
      |                                                                ^
Language: C++

#pragma region
#include <bits/stdc++.h>
using namespace std;
inline void ci(void){
  return;
}
template <typename First, typename... Rest>
void ci(First& first, Rest&... rest){
  cin >> first;
  ci(rest...);
  return;
}
inline void co(void){
  cout << "\n";
  return;
}
template <typename First, typename... Rest>
void co(First first, Rest... rest){
  cout << first << " ";
  co(rest...);
  return;
}
#define ll long long
#define ld long double
#define st string
#define dl double
#define wh while
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define tp tuple
#define ft first
#define sc second
#define ve vector
#define tos to_string
#define len length
#define rt return 0
#define br break
#define con continue
#define lcm(n, m) (n * m / gcd(n, m))
#define np next_permutation
#define repi(i, m, n) for(int i=(int)(m);i<(int)(n);i++)
#define rep(i, n) repi(i, 0, n)
#define repill(i, m, n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define repll(i, n) repill(i, 0, n)
#define revi(i, m, n) for(int i=(int)(m);i>(int)(n);i--)
#define rev(i, n) revi(i, 0, n)
#define revill(i, m, n) for(ll i=(ll)(m);i>(ll)(n);i--)
#define revll(i, n) revill(i, 0, n)
#define sz(v) ((int)(v).size()) 
#define each(i, n) for(auto&& i: n)
#define all(n) (n.begin(), n.end())
#define allr(n) (n.rbegin(), n.rend())
#define sp(n) cout << fixed << setprecision(n)
#pragma endregion
// sqrt ルート, int 2*10^9, gcd　最大公約数
// __builtin_popcount bitの個数

int main() {
  char a, b;
  ci(a, b);
  if(a == b){
    co('H');
  }
  else{
    co('D')
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:66:12: error: expected ';' before '}' token
   66 |     co('D')
      |            ^
      |            ;
   67 |   }
      |   ~
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:9:60: error: expected ')' before '{' token
    9 |   if ( ( a == 'H' && b == 'H' ) || ( a == 'D' && b == 'D' ){
      |      ~                                                     ^
      |                                                            )
a.cc:15:1: error: expected primary-expression before '}' token
   15 | }
      | ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:24: error: 'd' was not declared in this scope
    5 |   if(a == 'H') cout << d << endl;
      |                        ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:24: error: 'd' was not declared in this scope
    5 |   if(a == 'H') cout << d << endl;
      |                        ^
a.cc:6:17: error: 'd' was not declared in this scope
    6 |   else cout << (d=='H'?'D':'H') << endl;
      |                 ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: expected primary-expression before '<<' token
   11 |     else << "D";
      |          ^~
Language: C++

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

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

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' ;
return 0;			
}



Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: lvalue required as left operand of assignment
    9 | if(a=='H' && b="H")
      |    ~~~~~~~^~~~
a.cc:11:11: error: lvalue required as left operand of assignment
   11 | if(a=='H' && b="D")
      |    ~~~~~~~^~~~
a.cc:13:19: error: lvalue required as left operand of assignment
   13 |         if(a=='D' && b="H")
      |            ~~~~~~~^~~~
a.cc:15:11: error: lvalue required as left operand of assignment
   15 | if(a=='D' && b="D")
      |    ~~~~~~~^~~~
Language: C++

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define IO(i, o) freopen(i, "r", stdin), freopen(o, "w", stdout)

using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());

char a, b;

int main(){
	//IO("input.txt", "output.txt");
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> a >> b;
	cout << (((a == 'H' && b == 'H') || (a == 'D' && b = 'D')) ? "H\n" : "D\n");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:55: error: lvalue required as left operand of assignment
   18 |         cout << (((a == 'H' && b == 'H') || (a == 'D' && b = 'D')) ? "H\n" : "D\n");
      |                                              ~~~~~~~~~^~~~
Language: C++

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


#define f(i,a,b) for(int i=(int)(a);i<=(int)(b);i++)
#define char_f(i,a) for(int i=(int)(a);(char)s[i]!='\0';i++)
#define rf(i,a,b) for(int i=(int)(a);i>=(int)(b);i--)
#define llf(i,a,b) for(long long int i=(long long int)(a);i<=(long long int)(b);i++)
#define llrf(i,a,b) for(long long int i=(long long int)(b);i>=(long long int)(a);i--)



#define ll long long
#define fi first
#define se second
#define pb push_back
#define pop pop_back
#define mem(ara) memset((ara),0,sizeof(ara))
#define memn(ara) memset((ara),-1,sizeof(ara))
#define b begin()
#define e end()
#define em emplace
#define eb emplace_back





#define si set<int>
#define sd set<double>
#define sll set<long long int>
#define ss set<string>
#define sc set<char>

#define pii pair<int,int>
#define pli pair<long long int,int>
#define pil pair<int,long long int>
#define pll pair<long long int,long long int>
#define pci pair<char,int>
#define pic pair<int,char>
#define pcl pair<char,long long int>
#define plc pair<long long int,char>

#define pss pair<string,string>
#define pcc pair<char,char>

#define pis pair<int,string>
#define psi pair<string,int>
#define pls pair<long long int,string>
#define psl pair<string,long long int>
#define pdd pair<double,double>
#define pcs pair<char,string>
#define psc pair<string,char>



#define vi  vector<int>
#define vll vector<long long int>
#define vd vector<double>
#define vs vector<string>
#define vc vector<char>
#define vii vector<pii>



#define mod 1000000007
#define mx (1<<30)-1
#define llmx (1ll<<62)
#define n_size 100005
#define g_size 10000005
double PI=acos(-1);



///unsigned int uMAX=4294967295;
///unsigned ll int ullMAX=18446744073709551615;





int arr[g_size];



int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

	int n,m,T,res;

	int maxi=-mx,mini=mx,count=0;

    	int i,j,k;

	bool flag;

	string s1,s2;

	char s[100000],a,b;

	int ara[n_size],ara2[n_size];
	
	cin>>a>>b;
	
	if(a=='H') {
        if(b=='H') cout<<"H"<<endl;
        if(b=='D') cout<<"D"<<endl;
	}
	else if(a=='D') {
        if(b=='H') cout<<"D"<<endl;
        if(b=='D') cout<<"H"<<endl;
	}	
	
	
}


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

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

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

using ll=long long;
const ll MOD=1000000007;

int main() {
  stirng 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:8:3: error: 'stirng' was not declared in this scope
    8 |   stirng a,b;
      |   ^~~~~~
a.cc:9:10: error: 'a' was not declared in this scope
    9 |   cin >> a >> b;
      |          ^
a.cc:9:15: error: 'b' was not declared in this scope
    9 |   cin >> a >> b;
      |               ^
Language: C++

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

int main(void) {
  int 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 (a=='D' && b =='D')
  cout << H << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: 'H' was not declared in this scope
   12 |   cout << H << endl;
      |           ^
a.cc:14:11: error: 'D' was not declared in this scope
   14 |   cout << D << endl;
      |           ^
a.cc:16:12: error: 'D' was not declared in this scope
   16 |    cout << D << endl;
      |            ^
a.cc:17:25: error: expected ';' before 'cout'
   17 | else (a=='D' && b =='D')
      |                         ^
      |                         ;
   18 |   cout << H << endl;
      |   ~~~~
Language: C++

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

int main(void) {
  int 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 (a=='D' && b =='D')
  cout << 'H' << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:25: error: expected ';' before 'cout'
   17 | else (a=='D' && b =='D')
      |                         ^
      |                         ;
   18 |   cout << 'H' << endl;
      |   ~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: expected ';' before '}' token
   11 |     b == 'H'
      |             ^
      |             ;
   12 |   }
      |   ~
Language: C++

#include <iostream>
using namespacr std;
int main ()
{
char A,B ;
cin>>A>>B;
if (A==B)
cout << "H";
else 
cout << "D" ;

return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespacr'
    2 | using namespacr std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 | cin>>A>>B;
      | ^~~
      | std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 | cout << "H";
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:10:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 | cout << "D" ;
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

include<iostream>
using namespace std;
int main(){
  char 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;
  }
  return 0;

}


Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<iostream>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin>>a>>b;
      |   ^~~
a.cc:7:15: error: 'cout' was not declared in this scope
    7 |     if(b=='H')cout<<'H'<<endl;
      |               ^~~~
a.cc:7:26: error: 'endl' was not declared in this scope
    7 |     if(b=='H')cout<<'H'<<endl;
      |                          ^~~~
a.cc:8:10: error: 'cout' was not declared in this scope
    8 |     else cout<<'D'<<endl;
      |          ^~~~
a.cc:8:21: error: 'endl' was not declared in this scope
    8 |     else cout<<'D'<<endl;
      |                     ^~~~
a.cc:11:15: error: 'cout' was not declared in this scope
   11 |     if(b=='H')cout<<'D'<<endl;
      |               ^~~~
a.cc:11:26: error: 'endl' was not declared in this scope
   11 |     if(b=='H')cout<<'D'<<endl;
      |                          ^~~~
a.cc:12:10: error: 'cout' was not declared in this scope
   12 |     else cout<<'H'<<endl;
      |          ^~~~
a.cc:12:21: error: 'endl' was not declared in this scope
   12 |     else cout<<'H'<<endl;
      |                     ^~~~
Language: C++

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

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:4:27: error: 'cout' was not declared in this scope
    4 |     if (a=='H' && b=='H') cout << "H\n";
      |                           ^~~~
a.cc:5:32: error: 'cout' was not declared in this scope
    5 |     else if (a=='H' && b=='D') cout << "D\n";
      |                                ^~~~
a.cc:6:27: error: 'cout' was not declared in this scope
    6 |     if (a=='D' && b=='H') cout << "D\n";
      |                           ^~~~
a.cc:7:32: error: 'cout' was not declared in this scope
    7 |     else if (a=='D' && b=='D') cout << "H\n";
      |                                ^~~~
Language: C++

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

int main() {
	int 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:8:21: error: lvalue required as left operand of assignment
    8 |         if( a = 'H' && b = 'H' ) cout << 'H' << endl;
      |                 ~~~~^~~~
a.cc:9:26: error: lvalue required as left operand of assignment
    9 |         else if( a = 'H' && b = 'D' ) cout << 'D' << endl;
      |                      ~~~~^~~~
a.cc:10:26: error: lvalue required as left operand of assignment
   10 |         else if( a = 'D' && b = 'H' ) cout << 'D' << endl;
      |                      ~~~~^~~~
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;
int main() {
    string a, b; cin >> a >> b;
    if (
        equal(a,b)
        ){
            cout<<'H';
        }else cout<<'D';
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:14: error: no matching function for call to 'equal(std::string&, std::string&)'
    7 |         equal(a,b)
      |         ~~~~~^~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:1582:5: note: candidate: 'template<class _II1, class _II2> bool std::equal(_II1, _II1, _II2)'
 1582 |     equal(_II1 __first1, _II1 __last1, _II2 __first2)
      |     ^~~~~
/usr/include/c++/14/bits/stl_algobase.h:1582:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algobase.h:1613:5: note: candidate: 'template<class _IIter1, class _IIter2, class _BinaryPredicate> bool std::equal(_IIter1, _IIter1, _IIter2, _BinaryPredicate)'
 1613 |     equal(_IIter1 __first1, _IIter1 __last1,
      |     ^~~~~
/usr/include/c++/14/bits/stl_algobase.h:1613:5: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/bits/stl_algobase.h:1704:5: note: candidate: 'template<class _II1, class _II2> bool std::equal(_II1, _II1, _II2, _II2)'
 1704 |     equal(_II1 __first1, _II1 __last1, _II2 __first2, _II2 __last2)
      |     ^~~~~
/usr/include/c++/14/bits/stl_algobase.h:1704:5: note:   candidate expects 4 arguments, 2 provided
/usr/include/c++/14/bits/stl_algobase.h:1737:5: note: candidate: 'template<class _IIter1, class _IIter2, class _BinaryPredicate> bool std::equal(_IIter1, _IIter1, _IIter2, _IIter2, _BinaryPredicate)'
 1737 |     equal(_IIter1 __first1, _IIter1 __last1,
      |     ^~~~~
/usr/include/c++/14/bits/stl_algobase.h:1737:5: note:   candidate expects 5 arguments, 2 provided
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;
int main() {
    string a, b; cin >> a >> b;
    if (
        a.equal(b)
        ){
            cout<<'H';
        }else cout<<'D';
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'equal'
    7 |         a.equal(b)
      |           ^~~~~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:9:15: error: 'H' was not declared in this scope
    9 |         if(A==H && B==H || A==H && B==D){
      |               ^
a.cc:9:39: error: 'D' was not declared in this scope
    9 |         if(A==H && B==H || A==H && B==D){
      |                                       ^
Language: C

#include <stdio.h>

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

Compiler output:
main.c: In function 'main':
main.c:15:17: error: expected '}' before 'else'
   15 |                 else {
      |                 ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
	char a,b;
	cin>>a>>b;
	printf(a==b?"H","D");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:28: error: expected ':' before ')' token
    7 |         printf(a==b?"H","D");
      |                            ^
      |                            :
a.cc:7:28: error: expected primary-expression before ')' token
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:13:33: error: invalid operands of types 'char' and '<unresolved overloaded function type>' to binary 'operator<<'
   13 |     cout << (b == 'H')? 'D': 'H'<< endl;
      |                              ~~~^~~~~~~
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for(int64_t i=0;i < (int64_t)(n);i++)
using namespace std;

//////全探索したいときに開けよ////////
vector<vector<int>> fspattern;
vector<int> fspattern_draft;
int fspcnt = 0;

void setfspattern_core(int floor,int number,int degree){
  if(floor==degree){
    fspattern.at(fspcnt) = fspattern_draft;
    fspcnt++;
  }else{
    rep(i,number){
      fspattern_draft.at(floor) = i;
      setfspattern_core(floor+1,number,degree);
    }
  }
}

void setfspattern(int number,int degree){
  int64_t array_num = 1;
  rep(i,degree){
    array_num *= number;
  }
  fspattern = vector<vector<int>>(array_num,vector<int>(degree));
  fspattern_draft = vector<int>(degree);
  setfspattern_core(0,number,degree);
}

//////nCrのmodを求めたいときに開けよ/////////
//int64_t univMod = 1000000007;
//int64_t factnum = 100000
//vector<int64_t> modfact(factnum);
//vector<int64_t> modinvfact(factnum);

/*void setmodfact(){
  for(int i=0;i<factnum;i++){
    if(i == 0){
      modfact.at(i) = 1;
    }else{
      modfact.at(i) = (modfact.at(i-1)*i)%univMod;
    }
  }
}

int64_t calcmodpower(int64_t a,int64_t n){
  int64_t res = 1;
  while(n != 0){
    if(n & 1){
      res = (res * a) % univMod;
    }
    a = (a*a) % univMod;
    n = n >> 1;
  }
  return res;
}

int64_t calcinverse(int64_t n){
	return calcmodpower(n,univMod-2);
}

void setmodinvfact(){
  for(int i=0;i<factnum;i++){
    if(i==0){
      modinvfact.at(i) = 1;
    }else{
      modinvfact.at(i) = calcmodpower(modfact.at(i),univMod-2);
    }
  }
}

int64_t calcmodcomb(int64_t n,int64_t r){
  return (((modfact.at(n)*modinvfact.at(r))%univMod)*modinvfact.at(n-r))%univMod;
}

int64_t calcmodpositive(int64_t n){
  return (n + ((abs(n)+univMod-1)/univMod)*univMod)%univMod;
}
  
    */


/*
int64_t calcGCD(int64_t a,int64_t b){
	int64_t p = a;
	int64_t q = b;
	int64_t c = a%b;
	while(c != 0){
		p = q;
		q = c;
		c = p%q;
	}
	return q;
}
*/

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


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

import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def SI(): return sys.stdin.readline()[:-1]

def main():
    a,b=input().split()
    if a==b:print("H")
    else:print("D")

main()

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import sys
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

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

int main(){
    //入力
    char a,b;
    cin >> a >> b ;

    //出力
    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:10:27: error: 'A' was not declared in this scope
   10 |     if((a=='H'&&b=='H')||(A=='D'&&b=='D')){
      |                           ^
Language: C++

https://atcoder.jp/contests/abc056/clarifications#include<stdio.h>
int main()
{
    int  a,b;
    scanf("%c %c",&a,&b);
    if(a==72){
        printf("%c",b);
    }
    else if(a==68){
        if(b==72){
            printf("D");
        }
        else{
            printf("H");
        }
    }
    else {
        printf("\n");
    }
    return 0;
}


Compiler output:
a.cc:1:1: error: 'https' does not name a type
    1 | https://atcoder.jp/contests/abc056/clarifications#include<stdio.h>
      | ^~~~~
Language: C++

a, b = tuple(input().split())


def judge():
    def sub_judge1():
        if a == 'H':
            return True
        else:
            return False
    def sub_judge2():
        if b == 'H':
            return True
        else:
            return False

    if sub_judge2():
        return sub_judge1()
    else:
        return not sub_judge1()


if judge():
    print('H')
else:
    print('D')


Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a, b = tuple(input().split())
      | ^
Language: C++

#include <stdlib.h>
#include <bits/stdc++.h>
#include <math.h>
using namespace std;
using ll=long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
inline constexpr ll gcd(ll a,ll b){if(!a||!b)return 0;while(b){ll c=b;b=a%b;a=c;}return a;}
inline constexpr ll lcm(ll a,ll b){if(!a||!b)return 0;return a*b/gcd(a,b);}
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
const long long INF=1LL << 60;
long long a,b;
long long dp[100200][110];
long long w[110],v[110];

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

}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:7: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   31 |   if(a=="D"){
      |      ~^~~~~
a.cc:32:11: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   32 |       if(b=="D"){
      |          ~^~~~~
a.cc:39:7: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   39 |   if(a=="H"){
      |      ~^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
{
  map<char, int> m;
  m["D"]=0;m["H"]=1;
  char a,b;cin>>a>>b;
  if((m[a]^m[b]))cout<<"H";
  else cout<<"D";
}

Compiler output:
a.cc:3:1: error: expected unqualified-id before '{' token
    3 | {
      | ^
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;
    else if (a == 'D' && b == 'H' ) cout << 'D'<< endl;
    else if (a == 'H' && b == 'D') cout << 'D' << endl;
    else (a == 'D' && b == 'D') cout << 'H' << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:32: error: expected ';' before 'cout'
   10 |     else (a == 'D' && b == 'D') cout << 'H' << endl;
      |                                ^~~~~
      |                                ;
Language: C++

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

int main() {

char T,D;
  cin>>T>>D;
  
  if(T=='H'&&D=='H'){cout<<'H'<<endl;}
  else if(T=='D'&&D=='H'){cout<<'D'<<endl;}
  else if(T=='D'&&D=='D'){cout<<'H'<<endl;}
   else if(T=='H'&&D=='D'){cout<<'D'<<endl;}
    
cout<<ans<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:14:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   14 | cout<<ans<<endl;
      |       ^~~
      |       abs