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

class Program
{
    static void Main(string[] args)
    {
        long n = long.Parse(Console.ReadLine());
        long ans = 0;

        long clear1 = n * 2;
        long clear2 = 0;

        while (n > 0)
        {
            clear2 += n;
            n /= 2;
        }

        ans = clear1 - clear2;
        if (ans < 0)
        {
            ans *= -1;
        }

        Console.WriteLine(ans);
        Console.Read();
    }
}