#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;
int main ()
{
    int a[100][100],m,n,s=0,k=1;
    cout<<"M = ";cin>>m;
    cout<<"N = ";cin>>n;
    while(k<=n)
    {
        s=s+(m-k)*(n-k);
        k++;
    }
    k=2;
    while(k<=n)
    {
        s=s+(m-k)*(n-k);
        k=k+2;
    }
    cout<<s;
}