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

public class Main {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long n = Integer.parseInt(br.readLine());
        long k = n;
        long meisei = 0;

        while(k!=0) {
            meisei += k;
            k /= 2;
        }
        System.out.println(n*2-meisei);
    }
}