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

#define endl '\n'
#define ff first
#define ss second
#define mp make_pair
#define pb push_back

typedef long long llong;
typedef pair<int, int> pii;

void solve() {

	int n;
	cin >> n;

	vector<int> arr(n);
	for (int i = 0; i < n; i++) cin >> arr[i];
	sort(arr.begin(), arr.end(), greater<int>());

	llong ans = 0;

	int curr = 0;

	for (int val : arr) {

		ans += val * (1LL << curr++);

	}

	cout << ans;

}

int main() {

	ios_base::sync_with_stdio(0);
	cin.tie(0);

	#ifdef LOCAL
		ifstream in("in");
		cin.rdbuf(in.rdbuf());
	#endif

	solve();

	return 0;

}