#include <bits/stdc++.h>

#define fs first
#define sc second
#define mp make_pair
#define pp push_back

typedef long long ll;

using namespace std;

int main(){
	int n;
	scanf("%d", &n);
	int c[n];
	for (int i = 0; i < n; ++i)
	{
		scanf("%d", &c[i]);
	}
	sort(c, c+n);
	long long ans = 0;
	long long count = 0;
	for (int i = n-1; i >= 0; --i)
	{
		ans += pow(2,count) * c[i];
		count++;
	}
	cout << ans << endl;
	return 0;

}