import java.util.Scanner;

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