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

namespace yukicodeX {
    public class ProgramX {
        public static int Solver(System.IO.TextReader reader) {
            var l = int.Parse(reader.ReadLine());
            var n = int.Parse( reader.ReadLine() );
            return (int)Math.Pow(2,l-3) * n;
        }

        private static void Main() {
            Console.WriteLine( Solver( Console.In ) );
        }
    }
}