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

#define forn(i, n) for (int i = 0; i < (int)(n); i++)
#define forn1(i, n) for (int i = 1; i <= (int)(n); i++)
#define forab(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define sz(a) (int) a.size()

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout << setprecision(20);	
	int n;
	cin >> n;
	vector<int> cal(n);
	forn(i, n) cin >> cal[i];
	long long int ans = 0;
	sort(cal.rbegin(), cal.rend());
	forn(i, n){
		ans += cal[i]*pow(2,i);
	}
	cout << ans << endl;
    return 0;
}