#include <bits/stdc++.h>

#define ll long long
#define ld long double
using namespace std;

int main() {
    ll n;
    cin >> n;
    ll a[n+1];
    for (ll i = 1; i <= n; i++)
        cin >> a[i];
    sort(a + 1, a + n+ 1);
    ll answ = 0;
    ll k = 0;
    for (ll i = n; i >= 1; i--)
    {
        answ += (a[i] * (ll)pow(2,k));
        k++;
//        cout << answ << endl;
    }
    cout << answ << endl;
    return 0;
}