using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        getAns(n);
    }
    static void getAns(long n)
    {
        var c = 0;
        for (int i = 0; i < 60; i++)
        {
            if (((n >> i) & 1) == 1) c++;
        }
        var ans = (long)Pow(2, c) - 2;
        Console.WriteLine(ans);
    }
}