public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
int count = 0;
for(int i = 0;i < 32;i++) {
if(((num >> i) & 1) == 1) {
count++;
}
}
System.out.println(count);
}
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
int count = 0;
for(int i = 0;i < 32;i++) {
if(((num >> i) & 1) == 1) {
count++;
}
}
System.out.println(count);
}
}