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

namespace yukicode {
    public class Program {
        public static UInt64 F(UInt64 n) {
            return n + ( n / 2 == 0 ? 0 : F( n / 2 ) );
        }
        public static UInt64 Solver(System.IO.TextReader reader) {
            var x = UInt64.Parse( reader.ReadLine() );
            return x * 2 - F( x );
        }

        private static void Main() {
            Console.WriteLine( Solver( Console.In ) );
        }
    }
}