import java.util.Scanner;

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

        long N = sc.nextLong();
        long fame = N*2;
        while(true){
            fame -= N;
            N = N/2;
            if(N == 0){
                System.out.println(fame);
                break;
            }
        }
    }
}