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

namespace y
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = long.Parse(Console.ReadLine());

            long c = 0;
            long[] a = { 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215, 33554431, 67108863, 134217727, 268435455, 536870911, 1073741823, 2147483647, 4294967295, 8589934591, 17179869183, 34359738367, 68719476735, 137438953471, 274877906943, 549755813887, 1099511627775, 2199023255551, 4398046511103, 8796093022207, 17592186044415, 35184372088831, 70368744177663, 140737488355327, 281474976710655, 562949953421311, 1125899906842623, 2251799813685247, 4503599627370495, 9007199254740991, 18014398509481983, 36028797018963967, 72057594037927935, 144115188075855871, 288230376151711743, 576460752303423487, 1152921504606846975 };
            long h = 1;
            if (n == 1) n = 0;

            while (n != 0)
            {
                var b = a.Where(x => x < n).Max();
                if (b - (n - b - 1) == 0)break;
                c += (b - (n - b - 1)) * h;
                n = (n - (b - (n - b - 1))) / 2;
                if (n == 1) break;
                h *= 2;
            }

            Console.WriteLine(c);
        }
    }
}