#include <stdio.h>
#include <math.h>
int main(void){
    int i=0;
    int n=0;
    scanf("%d%d",&i,&n);
    
    double joken1 = pow(2.0,(double)i);
    int m=0;
    int N2 = (int)joken1;
    double joken2 = pow(2.0,(double)n);
    int K2 = (int)joken2;
    int num=0;
    for(m=1;m<=N2;m++){
        if(m%K2==0){
            num++;
        }
    }
    printf("%d",num);
}