#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int n;
int a[44];

int main() {
    cin >> n;
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    sort(a, a + n);
    reverse(a, a + n);
    long long res = 0;
    for (int i = 0; i < n; ++i) res += (long long)a[i] << i;
    cout << res << endl;
    return 0;
}