import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long N = scan.nextLong();
		scan.close();
		int k = (int) (Math.log10(N) / Math.log10(2));
		long sum = N;
		for(int i = 0; i < k; i++) {
			long a = (long) Math.pow(2, (i + 1));
			sum += (long) (N / a);
		}
		long ans = N + ((long) (N / 2)) * 2 - sum;
		System.out.println(ans);
	}
}