import java.util.Scanner;

public class LoL {
	public static void main(String[] args) {
		long  l = 0;
		int t = 0;
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		long k = N;
		long by = N*2;
		while(k!=0){
			l+=k;
			k = k/2;
		}
		t = (int) ((int)by - l);
		System.out.println(t);
		sc.close();
	}
}