#include<stdio.h>
#include<math.h>
int n,k;
int main() {
	int i;
	int count = 0;
	int powers_n;
	int powers_k;
	scanf("%d %d", &n, &k);
	powers_n = pow(2,n);
	powers_k = pow(2,k);
	for(i = 1;i <= powers_n;i++) {
		if(powers_k * i <= powers_n) {
			count++;
		}
	}
	printf("%d\n",count);
	return (0);
}