package net.ipipip0129.yukicoder.no378;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        long exp = scan.nextLong();
        long total_exp = exp;
        long max_exp = exp * 2;

        while (exp != 0) {
            total_exp += exp/2;
            exp /= 2;
        }

        System.out.println(max_exp - total_exp);
    }
}