Codeforces-SolutionsA/50A DominoPiling/50A.cpp
2023-06-07 22:31:31 +06:00

10 lines
124 B
C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,m,d;
cin>>n>>m;
d=(n*m)/2;
cout<<d<<endl;
}