using System;

public class Program

{

    public static int count_bits(long x) {

        int r = 0;

        while (x > 0) {

            r += (int)(x & 1);

            x >>= 1;

        }

        return r;

    }

    public static void Main()

    {

        Console.WriteLine( count_bits(16909455360L) );

    }

}