#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];
    }
    sort(calories.begin(),calories.end());
    long long int exp=1;
    long long int ans=0;
    for(int calories_i = calories.size()-1; calories_i >=0 ; calories_i--){
       ans+=calories[calories_i]*exp;
        exp=exp*2;
        //cout<<calories[calories_i];
        
    }
    cout<<ans;
    // your code goes here
    return 0;
}