using System;
using System.Numerics;
public static class P
{
    public static void Main()
    {
        string ns = Console.ReadLine();
        BigInteger n = 0;
        foreach (var c in ns) n = n * 10 + c - '0';
        BigInteger res = 0;
        while (n > 0)
        {
            res += n;
            n >>= 1;
        }
        Console.WriteLine(n * 2 - res);
    }
}