using System;
using System.Collections.Generic;
using System.Linq;

public class Yuki820
{
	public static void Main()
	{
		var nk = Console.ReadLine().Split(' ').Select(n => int.Parse(n)).ToList();
	
		var x = (int)Math.Pow(2, nk[1]);
		var y = (int)Math.Pow(2, nk[0]);
			
		Console.WriteLine(y / x);	
	}
}