public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
if(sc.hasNext()){
int num = sc.nextInt();
String s= Integer.toBinaryString(num);
//然后遍历这个数组
int count=0;
for(int i=0;i<s.length();i++){
if(s.charAt(i)=='1'){
count++;
}
}
System.out.print(count);
}
}
}