#include <fstream>
#define NMAX 5000001
using namespace std;
ifstream fin("pascal.in");
ofstream fout("pascal.out");

int n, k, d[NMAX], t[NMAX], c[NMAX], sol, c2, c3, c5;
int main()
{
    fin>>n>>k;
    for(int i=2; i<=n; i++)
    {
        if(i%2==0)
            d[i]=1+d[i/2];
        if(i%3==0)
            t[i]=1+t[i/3];
        if(i%5==0)
            c[i]=1+c[i/5];
    }
    for(int i=1; i<=n; i++)
    {
        c2+=d[n-i+1]-d[i];
        c3+=t[n-i+1]-t[i];
        c5+=c[n-i+1]-c[i];
        if(k==2 && c2!=0)
            sol++;
        else if(k==3 && c3!=0)
            sol++;
        else if(k==4 && c2>1)
            sol++;
        else if(k==5 && c5!=0)
            sol++;
        else if(k==6 && c2!=0 && c3!=0)
            sol++;
    }
    fout<<sol;
    return 0;
}