#!/usr/bin/ruby
# -*- coding: utf-8 -*-
#
# 381.rb: No.381 名声値を稼ごう Extra - yukicoder
#

### main

n = gets.to_i

cnt = 0
while n > 0 do
  m = n & 0xffff
  while m > 0
    cnt += 1 if ((m & 1) != 0)
    m >>= 1
  end
  n >>= 16
end

puts cnt