import java.util.*;
class B{
	static Scanner s = new Scanner(System.in);
	public static void main(String[] args) {
		long in = Long.parseLong(s.next()),l=0,b=in;
		while(b>0) {
			l+=b;
			b/=2;
		}
		System.out.println(in*2-l);
	}
}