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

#define sqr(x) (x) * (x)
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ull n;
    cin >>n;
    vector <ull> a(n);
    for (ull i = 0; i < n; i++)
        cin >>a[i];
    ull sum = 0;
    sort(all(a));
    reverse(all(a));
    ull bi = 1;
    for (ull i = 0; i < n; i++) {
        sum += bi * a[i];
        bi *= 2;
    }
    cout <<sum;
    return 0;
}