func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, count, area;     cin >> a >> b;     area = a * b;     if (area < 2)       cout <<  0  << endl;     else {       while (area >= 2) {         count++;         area -= 2;       }       cout << count << endl;     }     return 0;   }   