import java.io.*;
import java.util.*;


public class Main_yukicoder589_1 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		long n = sc.nextLong();

		pr.println(n + 1 - cntOdd(n));
	}

	private static long cntOdd(long n) {
		if (n == 0) {
			return 1;
		} else if (n == 1) {
			return 2;
		}

		long tmp = 2;
		while (n >= tmp * 2) {
			tmp *= 2;
		}

		return 2 * cntOdd(n - tmp);
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}