import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        long N = Long.parseLong(reader.readLine());
        System.out.println(N*2 - calculateReputation(N));
    }

    private static long calculateReputation(long n) {
        long reputation = 0;
        while (n != 0) {
            reputation += n;
            n = n / 2;
        }
        return reputation;
    }
}