#include <cstdio>
using namespace std;
int x2,x3,x5,p2,p3,p5,r,d,val,rez,i;
int main()
{
freopen("pascal.in","r",stdin);
freopen("pascal.out","w",stdout);
scanf("%d%d",&r,&d);
if (d==2) x2=1;
if (d==3) x3=1;
if (d==4) x2=2;
if (d==5) x5=1;
if (d==6) {
          x2=1;
          x3=1;
          }
for (i=1;i<=r/2;i++)
    {
    val=r-i+1;
    while (val%2==0) {
                     p2++;
                     val/=2;
                     }
    while (val%3==0) {
                     p3++;
                     val/=3;
                     }
    while (val%5==0) {
                     p5++;
                     val/=5;
                     }
    val=i;
    while (val%2==0) {
                     p2--;
                     val/=2;
                     }
    while (val%3==0) {
                     p3--;
                     val/=3;
                     }
    while (val%5==0) {
                     p5--;
                     val/=5;
                     }
    if (x2<=p2) if (x3<=p3) if (x5<=p5) rez++;
    }
rez*=2;
if (r%2==0) rez--;
printf("%d",rez);
}