import java.util.Scanner;
public class Solution_erjinzhiNo1
{
public int NumberOf1(int n)
{
int count = 0;
while (n != 0)
{
++count;
n = (n - 1) & n;
}
return count;
}
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
Solution_erjinzhiNo1 s = new Solution_erjinzhiNo1();
System.out.println(s.NumberOf1(n));
}
}