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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            long N = long.Parse(Console.ReadLine());
            long a = N * 2;
            for (; N > 0; N >>= 1)
            {
                a -= N;
            }
            Console.WriteLine(a);
            Console.ReadLine();
        }
    }
}