#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);

}