#include <fstream>
using namespace std;
ifstream in("mins.in");
ofstream out("mins.out");
int cmmdc(int a, int b)
{
    while(b!=0)
    {
        int r=a%b;
        a=b;
        b=r;
    }
    return a;
}
int main()
{
    int n, m;
    in>>n>>m;
    int rez=(n-1)*(m-1);
    for(int i=1;i<n;i++)
        for(int j=i;j<m;j++)
            if(cmmdc(i,j)!=1)
                rez--;
    out<<rez;
    return 0;
}