#include <bits/stdc++.h>

using namespace std;

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