import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	static long[][] c = new long[10][10];
	{
		c[0][0] = 1;
		for (int i = 1; i < 10; ++i) {
			for (int j = 0; j <= i; ++j) {
				c[i][j] = c[i - 1][j] + (j > 0 ? c[i - 1][j - 1] : 0);
				// if (c[i][j] % 2 == 0) {
				// System.out.println(Integer.toBinaryString(i));
				// System.out.println(Integer.toBinaryString(j));
				// System.out.println();
				// }
			}
		}
	}

	static void run() {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		int[] cnt = new int[2];
		long d = n;
		while (d > 0) {
			++cnt[(int) (d % 2)];
			d /= 2;
		}
		System.out.println((n + 1) - (1L << cnt[1]));
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}