public class Program
{
    public static void Main()
    {
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;


        int a = int.Parse(str[0]);
        int b = int.Parse(str[1]);


        if (a == b)
        {
            Console.WriteLine(1);
            return;
        }
        int count = 0;

        double w = Math.Pow(2, a);
        if (b == 0)
        {
            Console.WriteLine(w);
            return;
        }

        double e = Math.Pow(2, b);

        count = (int)(w / e);

        Console.WriteLine(count);
    }
}