#include "bits/stdc++.h"

#define int long long
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = 1000000007;


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n; cin >> n;
	vector<int>A(n); for (int i = 0; i < n; i++)cin >> A[i];
	sort(A.rbegin(), A.rend());
	int ans = 0;
	int t = 1;
	int cnt = 0;
	int now = 0;
	for (int i = 0; i < n; i++) {
		ans += now * A[i];
		cnt++;
		if (cnt == t) {
			cnt = 0; t *= 2;
			now++;
		}
	}
	cout << ans << endl;
	return 0;
}