import java.util.*;

public class LoL {
	public static void main(String[] args) {
		long  i = 1;
		long k = 0;
		long  l = 0;
		long t = 0;
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		k = N;
		long by = N*2;
		//System.out.println(by);
		
		while(k!=0){
			l+=k;
			k = k/2;
		}
		//System.out.println(k);
		//System.out.println(l);
		
		t = by - l;
		System.out.println(t);
		
	}
}