using System;

public class Hello
{
    public static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        var n2 = n;
        var ans = 0L;
        while (n2 > 0)
        {
            ans += n2;
            n2 /= 2;
        }
        Console.WriteLine(n * 2 - ans);
    }
}