#include <bits/stdc++.h>

using namespace std;

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