#include <bits/stdc++.h>

using namespace std;
typedef long long int ll;
int main(){
    int n;
    cin >> n;
    int calories[n];
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories,calories+n);
    ll i,j=0,sum=0;
    for ( i=n-1;i>=0;i--){
        sum+=(calories[i]*pow(2,j));
        j++;
    }
    cout << sum<<endl;
    
    // your code goes here
    return 0;
}