using System.Numerics;

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;

        if (str[0] != 'x')
        {
            Console.WriteLine(str);
        }
        else
        {
            BigInteger a = 4294967296 - int.Parse(str.Replace("x", ""));
            Console.WriteLine(a);
        }



    }
}