import java.util.*;
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
String binStr = Integer.toBinaryString(num);
char[] binChars = binStr.toCharArray();
int count = 0;
for( char e: binChars){
if(e== '1'){
count++;
}
}
System.out.print(count);
}
}