import java.util.*;

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