#include <cstdio>

using namespace std;

int main()
{
    freopen("mins.in","r",stdin);
    freopen("mins.out","w",stdout);
    int c ,d;
    scanf("%d%d",&c,&d);
    long long prod=1;
    prod=1LL*(c-1)*(d-1);
    for(int i=1;i<c;i++)
    {
        int val=d/i;
        if(val>d-1)val=d-1;
        prod-=val-1;
    }
    printf("%lld",prod);
    return 0;
}