import java.util.Scanner;
class YukiCoder01 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		long k = N;
		long i  = N;
		long Na = N*2;
		long Nb= 0;

		while (k !=0){
			k=k/2;
			i=i+k;
		}
		Nb = i;
		long gap =Na-Nb;
		//System.out.println(Na);
		//System.out.println(Nb);
		System.out.println(gap);

	}
}