#include <fstream>
#include <vector>
using namespace std;
ifstream f("mins.in");
ofstream g("mins.out");
int i,j,n,m,numar,a,b,r,p,sum,maxim,d,nr,p1,minim,ok,t;
vector <int> v[5005];
int main()
{
    f>>n>>m;
    maxim=max(n,m);
    for (i=1;i<=maxim;i++)
    {
        d=2;
        a=i;
        while (a>1)
        {
             if (a%d==0)
             {
                 v[i].push_back(d);
                 while (a%d==0)
                 {
                     a=a/d;
                 }
             }
             d++;
        }
    }
    for (i=1;i<n;i++)
    {
        for (j=1;j<m;j++)
        {
            ok=1;
            for (t=0;t<v[i].size();t++)
            {
                if (j%v[i][t]==0)
                {
                    ok=0;
                    break;
                }
            }
            numar+=ok;
        }
    }
    g<<numar;
    return 0;
}