#include<cstdio>
int n, d, val1, val2, v[7], rez, r, i;
void desc()
{
	while(val1%2==0)
		v[2]++, val1=val1/2;
	while(val1%3==0)
		v[3]++, val1=val1/3;
	while(val1%5==0)
		v[5]++, val1=val1/5;
	while(val2%2==0)
		v[2]--, val2=val2/2;
	while(val2%3==0)
		v[3]--, val2=val2/3;
	while(val2%5==0)
		v[5]--, val2=val2/5;
}
int main()
{
	freopen("pascal.in", "r", stdin);
	freopen("pascal.out", "w", stdout);
	scanf("%d%d", &n, &d);
	r=n;
	for(i=1; i<=r/2; i++, n--)
	{
		val1=n;
		val2=i;
		desc();
		if((d==6&&v[2]>0&&v[3]>0)||(d==4&&v[2]>1)||v[d]>0)
			rez=rez+2;
	}
	if(((d==6&&v[2]>0&&v[3]>0)||(d==4&&v[2]>1)||v[d]>0)&&r%2==0)
		rez--;
	printf("%d", rez);
}