import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		while(sc.hasNext()){
			long n=sc.nextLong();
			long sum=n/2;
			long max=n;
			n/=2;
			while(n>0){
				n/=2;
				sum+=n;
			}
			System.out.println(max-sum);
		}
	}
}