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();
        
        long calos = 0;
        
        long []calories = new long[n];
        
        for (int i = 0; i < n; i++) {
            calories[i] = in.nextInt();
        }
        
        Arrays.sort(calories);
        
        for (int i = n - 1; i >= 0; i--) {
            
            int powI = n - i - 1;
            calos += ((long) Math.pow(2, powI) * calories[i]);
        }
        
        System.out.println(calos);
    }
}