import java.io.*;
import java.util.*;

public class Main {
    static FastScanner in;
    static int n, c[];

    public static void main(String[] args) throws IOException {
        //        System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream("nocross.out")), true));
        in = new FastScanner(System.in);
        //        in = new FastScanner("nocross.in");
        //        in = new FastScanner("input.txt");
        n = in.nextInt();
        c = new int[n];
        for (int i = 0;i < n;i++) {
            c[i] = in.nextInt();
        }
        Arrays.sort(c);
        long ans = 0;
        int j = n - 1;
        for (int i = 0; i < n; i++) {
            ans += c[i] * Math.pow(2, j);
            j--;
        }
        System.out.println(ans);
    }
}

class FastScanner {

    BufferedReader br;
    StringTokenizer tokenizer;

    FastScanner(String fileName) throws FileNotFoundException {
        this(new FileInputStream(new File(fileName)));
    }

    FastScanner(InputStream is) {
        br = new BufferedReader(new InputStreamReader(is));
    }

    String nextLine() throws IOException {
        tokenizer = null;
        return br.readLine();
    }

    String next() throws IOException {
        if (tokenizer == null || !tokenizer.hasMoreTokens()) {
            String line = br.readLine();
            if (line == null) {
                return null;
            }
            tokenizer = new StringTokenizer(line);
        }
        return tokenizer.nextToken();
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    char nextChar() throws IOException {
        return next().charAt(0);
    }
}