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

int n, d1, d[NMAX], t[NMAX], c[NMAX], sol, c2, c3, c5;
int main()
{
    fin>>n>>d1;
    ///d[i]=la ce putere apare 2 in i!
    ///t[i]=la ce putere apare 3 in i!
    ///c[i]=la ce putere apare 5 in i!
    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(d1==2 && c2!=0)
        {
            sol++;
        }
        else if(d1==3 && c3!=0)
        {
            sol++;
        }
        else if(d1==5 && c5!=0)
        {
            sol++;
        }
        else if(d1==4 && c2>1)
        {
            sol++;
        }
        else if(d1==6 && c2!=0 && c3!=0)
        {
            sol++;
        }
    }
    fout<<sol;
    return 0;
}