import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] counts = new int[n];
        for (int i = 0; i < n; i++) {
            counts[i] = sc.nextInt();
        }
        Arrays.sort(counts);
        int idx = n - 1;
        long ans = 0;
        for (int i = 0; idx >= 0; i++) {
            for (int j = 0; j < (1 << i) && idx >= 0; j++) {
                ans += counts[idx] * i;
                idx--;
            }
        }
        System.out.println(ans);
    }
}