#include <stdio.h>
void main(void){
    int n = 0 , k = 0;
    scanf("%d %d",&n,&k);
    long long int max = 1;
    for(int i = 0 ; i < n ; i++){
        max *= 2;
    }
    long long int multiple = 1;
    for(int i = 0 ; i < k ; i++){
        multiple *= 2;
    }
    int count = 0;
    while(max >= multiple){
        max -= multiple;
        count++;
    }
    printf("%d",count);
}