using System;

​

public class Program

{

    public static void Main()

    {

        start:

            Console.WriteLine("Please enter an integer.");

        ulong input = ulong.Parse(Console.ReadLine());

        ulong x = 3;

        for (ulong i = 1; i <= input; i++)

        {

            x *= 2;

        }

​

        Console.WriteLine(x);

        Console.WriteLine("Press enter to run again.");

        Console.ReadLine();

        goto start;

    }

}