import java.util.*;

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

        Scanner s = new Scanner(System.in);
        long n = s.nextLong();
        long sum1 = 0;
        long sum2 = 0;

        for(long i=n;i>0;i/=2){
        	sum1 = sum1 + i;
        }

        sum2 = sum2 + 2 * n;

        System.out.println(sum2 - sum1);


    }
}