#include <bits/stdc++.h>
using namespace std;

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}
int main() {
	fast_io();
	int n;
	cin >> n;
	vector<int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	sort(a.rbegin(), a.rend());
	int k = 0, cur = 0;
	int ans = 0;
	for (int i = 0; i < n; i++) {
		ans += k * a[i];
		cur++;
		if (cur == (1 << k)) {
			cur = 0;
			k++;
		}
	}
	cout << ans << endl;
}