#include <bits/stdc++.h>

using namespace std;

#define ff first
#define ss second
#define pb push_back
#define eb emplace_back
#define fff ff
#define sss ss.ff
#define ttt ss.ss
#define INF 1000000000


#define FASTIO std::ios::sync_with_stdio(false)

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef unsigned int ui;

int min(int a, int b) {if (a < b) return a; return b;};
int max(int a, int b) {if (a > b) return a; return b;};

/*-----------------END TEMPLATE-----------------*/

int main() {

    ll n;
    cin >> n;
    vector<ll> cp;
    while (n--) {
        ll a;
        cin >> a;
        cp.pb(a);
    }

    sort(cp.begin(), cp.end(), greater<ll>());

    ll t = 0;
    ll c = 1;

    n = cp.size();
    for (ll i = 0; i < n; i++) {
        t += cp[i]*c;
        c *= 2;
    }
    cout << t << endl;
    
}