Okey, I knew that using long long takes more time than using int. It is kinda logical. But, I just got AC on a problem (MAXPR) that took 6.72 seconds with long long (4138250) and then the same solution with all long long changed to int (4138255) took only 2.89 seconds!!!
That's almost half the time the solution required!! I found this strange. Is this always suppose to be like this?