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 sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c[] = new int[n];
        for(int q = 0;q < n;q++){
            c[q] = sc.nextInt();
        }

        Arrays.sort(c);
        long total = 0;
        long a = 1;
        for(int i = n-1;i >= 0;i--){
        	total += c[i]*(a << (n-i-1));
        }
        System.out.println(total);
    }
}