Codeforces-SolutionsA/Codes/50 A - DominoPiling/50A.cpp

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2023-06-07 22:15:17 +08:00
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,m,d;
cin>>n>>m;
d=(n*m)/2;
cout<<d<<endl;
}