import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        Integer[] calories = new Integer[n];
        for(int calories_i=0; calories_i < n; calories_i++){
            calories[calories_i] = in.nextInt();
        }
        
        long sum = 0;
        long j = 1;
        Arrays.sort(calories, new IntegerComparator());
        for (int i = 0; i < n; i++) {
            sum += j * calories[i];
            j = j * 2;
        }
        System.out.println(sum);
    }
    
    private static class IntegerComparator implements Comparator<Integer> {
        @Override
        public int compare(Integer o1, Integer o2) {
            return o2.compareTo(o1);
        }
    }
}