func_code_string: #include <bits/stdc++.h>   int main(void) {     unsigned short int m, n, c;     scanf( %hu%hu , &m, &n);     c = m * n;     int i = 1;     while (i) {       if (c >= 2 * i)         i++;       else         break;     }     printf( %d n , (i - 1));     return 0;   }   