07.CountOfBitsOne

import java.util.Scanner;


public class CountOfBitsOne {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int number = input.nextInt();
        int mask = 1;
        int count = 0;
        for(int i = 0;i<32;i++){
            if((mask<<i & number)>0){
                count++;
            }
        }
        System.out.println(count);

    }

}