import java.util.*;

class Main{
    public static void main (String[] args) {
        
        Scanner s = new Scanner(System.in);
        int a =s.nextInt();
        int b =s.nextInt();
            int n = (int) Math.pow(2,a);
            int m = (int) Math.pow(2,b);
            int t = m/n;
                System.out.println(t);
    }
}