import java.util.Scanner;
public class Main {
/** * 作者:李涵林 */ public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int nextInt = scanner.nextInt(); String string = Integer.toBinaryString(nextInt); int count = 0; for (int i = 0 ; i < string.length(); i++) { if ("1".equals(String.valueOf(string.charAt(i)))) { count++; } } System.out.println(count); }
}