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();
        int[] c = new int[n];
        for(int i=0; i < n; i++){
            c[i] = in.nextInt();
        }
        Arrays.sort(c);
        
        long sum = 0;
        long pow = 1;
        for(int i = n-1; i >= 0; i--){
            sum += c[i] * pow; 
            pow = pow << 1;//pow *= 2
        }
        
        System.out.println(sum);
    }
}