hi,
in the acceptable answer the answer of 5 4 is 7 but you can easily understand that the real answer is 6(you can test it by drawing a simple 5 4 table).

here is a sample answer:

#include <iostream>

using namespace std;

int main() {
    int unsigned long long N , M , turn = 0;
 cin >> N >> M;



 while( N > 2 && M > 2){
     turn += 4;
     N -= 2;
     M -= 2;
 }
 if (N == 2 && M > 1 || M == 2 && N > 1)  turn += 2;

 if (M == 1 && N > 1) turn += 1;
  cout << turn << endl;

  system ("PAUSE");
  return 0 ;

}

Nope...for 5 4 , answer is 7.
For 4 5, answer is 6.

Edited by author 05.07.2015 11:06

Edited by author 05.07.2015 11:06