import java.util.Scanner;
public class TGMain {
    
    public static void main(String[] args){
        long N;
        long ans = 0;
        Scanner sc = new Scanner(System.in);
        N = sc.nextLong();
        while(N != 0){
            
           ans += N;
            N /= 2;
            
        }
        System.out.println(N*2 - ans);
    }
}