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) {
        int sum=0,i=0,a=0;
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] calories = new int[n];
        for(int calories_i=0; calories_i < n; calories_i++){
            calories[calories_i] = in.nextInt();}
        for(a=calories.length;a>0;a--)
            {
            Arrays.sort(calories);
       //     a=calories.length;
            sum=(int)(sum+((a)*(Math.pow(2,i))));
            i++;        
            
        }
        System.out.println(sum);// your code goes here
    }}