import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        while(n!= 1){
            if(n%2 == 1){
                count++;
            }
            n /= 2;
        }
        count++;
        System.out.print(count);
    }
}