import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int number1 = sc.nextInt();
        int number2 = sc.nextInt();
        
        int number3 =(int)Math.pow(2,number1);
        int number4 =(int)Math.pow(2,number2);
        
        
        System.out.println(number3 / number4);
    }
}