import java.util.*;


public class Main_yukicoder378 {

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

        long n = sc.nextLong();

        long tmp = n;
        long ret = 0;
        while (tmp > 0) {
        	ret += tmp;
        	tmp /= 2;
        }

        System.out.println(Math.abs(2 * n - ret));

        sc.close();
    }
}