#include <bits/stdc++.h>

using namespace std;

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