using System.Numerics;

public class Program
{
    public static void Main()
    {

        BigInteger num = BigInteger.Parse(Console.ReadLine() ?? string.Empty);
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] moji = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        //Console.WriteLine(num * 2);
        //Console.WriteLine(num / 2);
        BigInteger big = 0;
        while (num > 0)
        {
            big += num;
            num /= 2;
        }
        //Console.WriteLine(big);
        ////61728394561728394
        Console.WriteLine(num * 2 - big);

    }
}