#include <bits/stdc++.h>
#include <algorithm>

using namespace std;

int main(){
    int n;
    cin >> n;
    int C[n];
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> C[calories_i];
    }
    sort(C, C + n);
    long long ans = 0;
    for (int i = 0; i < n; i++) {
        ans += pow(2, i) * C[n - i - 1];
    }
    cout << ans;
    // your code goes here
    return 0;
}