import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		long n = sc.nextLong();
		long a = 0;
		long b = n*2;
		while (n > 0) {
			a += n;
			n /= 2;
		}
		System.out.println(b-a);
	}
}