using System;
using System.Collections;
using System.Linq;

class Program
{
	static void Main()
	{
		long n = long.Parse(Console.ReadLine()); //数字1つを読み込み
		long maxscore = n * 2;
		long normalscore = 0;
		for (long i = n; i > 0; i = i / 2)
		{
			normalscore += i;
		}
		Console.WriteLine(maxscore - normalscore);
	}
}