import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		long n=sc.nextLong(),s1=0,s2;
		sc.close();
		s2=n*2;
		do {
			s1+=n;
			n/=2;
		}while(n>0) ;
		System.out.print(Math.abs(s1-s2));
	}
}