import java.util.*;

public class Exercise97{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    long n = sc.nextLong();
    long nd = n;
    long a = 0;
    while(nd > 0){
      a += nd;
      nd /= 2;
    }
    System.out.println(n * 2 - a);
  }
}