Language: C++

		}
		long long w = H * W / 3 / H;
		long long ans2 = abs( w * H - (W - w) * (H / 2) );
		rest = H * W - w * H - (W - w) * (H / 2);
		ans2 = max( ans2, max( abs( w * H - rest ), abs( abs( (W - w) * (H / 2) - rest ) ) ) );
		while( 1 ) {
			w++;
			long long nextans = abs( w * H - (W - w) * (H / 2) );
			rest = H * W - w * H - (W - w) * (H / 2);
			nextans = max( nextans, max( abs( w * H - rest ), abs( abs( (W - w) * (H / 2) - rest ) ) ) );
			if( nextans > ans2 ) {
				break;
			}
			ans2 = min( ans2, nextans );
		}
		h = H / 3;
		long long ans3 = abs( h * W - (h + 1) * W );
		w = W / 3;
		long long ans4 = abs( w * H - (w + 1) * H );
		ans = min( ans1, min( ans2, min( ans3, ans4 ) ) );
	}

	cout << ans << endl;

	return 0;
}


Compiler output:
a.cc:1:17: error: expected declaration before '}' token
    1 |                 }
      |                 ^
a.cc:2:31: error: 'H' was not declared in this scope
    2 |                 long long w = H * W / 3 / H;
      |                               ^
a.cc:2:35: error: 'W' was not declared in this scope
    2 |                 long long w = H * W / 3 / H;
      |                                   ^
a.cc:2:43: error: 'H' was not declared in this scope
    2 |                 long long w = H * W / 3 / H;
      |                                           ^
a.cc:3:43: error: 'H' was not declared in this scope
    3 |                 long long ans2 = abs( w * H - (W - w) * (H / 2) );
      |                                           ^
a.cc:3:48: error: 'W' was not declared in this scope
    3 |                 long long ans2 = abs( w * H - (W - w) * (H / 2) );
      |                                                ^
a.cc:3:58: error: 'H' was not declared in this scope
    3 |                 long long ans2 = abs( w * H - (W - w) * (H / 2) );
      |                                                          ^
a.cc:3:34: error: 'abs' was not declared in this scope
    3 |                 long long ans2 = abs( w * H - (W - w) * (H / 2) );
      |                                  ^~~
a.cc:4:17: error: 'rest' does not name a type
    4 |                 rest = H * W - w * H - (W - w) * (H / 2);
      |                 ^~~~
a.cc:5:17: error: 'ans2' does not name a type
    5 |                 ans2 = max( ans2, max( abs( w * H - rest ), abs( abs( (W - w) * (H / 2) - rest ) ) ) );
      |                 ^~~~
a.cc:6:17: error: expected unqualified-id before 'while'
    6 |                 while( 1 ) {
      |                 ^~~~~
a.cc:16:17: error: 'h' does not name a type
   16 |                 h = H / 3;
      |                 ^
a.cc:17:39: error: 'h' was not declared in this scope
   17 |                 long long ans3 = abs( h * W - (h + 1) * W );
      |                                       ^
a.cc:17:43: error: 'W' was not declared in this scope
   17 |                 long long ans3 = abs( h * W - (h + 1) * W );
      |                                           ^
a.cc:17:48: error: 'h' was not declared in this scope
   17 |                 long long ans3 = abs( h * W - (h + 1) * W );
      |                                                ^
a.cc:17:57: error: 'W' was not declared in this scope
   17 |                 long long ans3 = abs( h * W - (h + 1) * W );
      |                                                         ^
a.cc:17:34: error: 'abs' was not declared in this scope
   17 |                 long long ans3 = abs( h * W - (h + 1) * W );
      |                                  ^~~
a.cc:18:17: error: 'w' does not name a type
   18 |                 w = W / 3;
      |                 ^
a.cc:19:43: error: 'H' was not declared in this scope
   19 |                 long long ans4 = abs( w * H - (w + 1) * H );
      |                                           ^
a.cc:19:57: error: 'H' was not declared in this scope
   19 |                 long long ans4 = abs( w * H - (w + 1) * H );
      |                                                         ^
a.cc:19:34: error: 'abs' was not declared in this scope
   19 |                 long long ans4 = abs( w * H - (w + 1) * H );
      |                                  ^~~
a.cc:20:17: error: 'ans' does not name a type
   20 |                 ans = min( ans1, min( ans2, min( ans3, ans4 ) ) );
      |                 ^~~
a.cc:21:9: error: expected declaration before '}' token
   21 |         }
      |         ^
a.cc:23:9: error: 'cout' does not name a type
   23 |         cout << ans << endl;
      |         ^~~~
a.cc:25:9: error: expected unqualified-id before 'return'
   25 |         return 0;
      |         ^~~~~~
a.cc:26:1: error: expected declaration before '}' token
   26 | }
      | ^