CountOfBitsOne

import java.util.Scanner;

public class _07_CountOfBitsOne {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int number = input.nextInt();
        int count = 0;

        for (int i = 0; i < 32; i++) {

            int bit = number & 1;

            if (bit == 1) {
                count++;
            }

            number >>= 1;

        }

        System.out.println(count);

    }

}