#include <bits/stdc++.h>

using namespace std;

long long a[40];

int main()
{
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> a[i];
    sort(a, a + n);
    long long ans = 0;
    for (int i = n - 1; i >= 0; i--)
        ans += (1ll << (n - 1 - i)) * a[i];
    cout << ans << '\n';
    return 0;
}