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

namespace yukikoda
{
    class Program
    {
        static void Main(string[] args)
        {
            long n = long.Parse(Console.ReadLine());
            long n2 = n;
            long a = 0;

            while (n != 0)
            {
                a += n;
                n /= 2;
            }

            Console.WriteLine((2 * n2) - a);
        }
    }
}