import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		long n = sc.nextLong(), s, tmp;
		tmp = n;
		s = n;
		while (tmp > 0) {
			s += tmp / 2;
			tmp /= 2;
		}
		System.out.println(n * 2 - s);
	}
}