#define _CRT_SECURE_NO_DEPRECATE
#include<iostream>
#include<cmath>
#include<algorithm>
#include<vector>
#include<string>
#include<queue>
#include <map>
#include<set>
#define lb  lower_bound
#define ub  upper_bound
#define pb  push_back
#define mp  make_pair
#define fs  first
#define sc  second
#define ll  long long
#define vi  vector<int>
#define vvi vector<vi >
#define mit map<int>::iterator
#define all(x) x.begin(), x.end()
#define PI 3.141592653592
#define eps 10e-6
#define inf (int)2e9;
using namespace std;

int main() {
//	freopen()
	int n;
	cin >> n;
	vector<int> calories(n);
	for (int calories_i = 0; calories_i < n; calories_i++) {
		cin >> calories[calories_i];
	}
	sort(all(calories));
	ll sum = 0;
	ll dv = 1;
	for (int i = 0; i < n; i++)
	{
		sum += dv*calories[n - i - 1];
		dv *= 2;
	}
	cout << sum;
	return 0;
}