#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int n;
    cin >> n;
    vector<int> v(n);
    for(int i = 0;i<n;i++){
        cin >> v[i];
    }
    sort(v.begin(),v.end(),[](int& a, int& b) {return a > b;});
    long long res = 0;
    long long p2 = 1;
    for(auto& x: v){
        res += (x * p2);
        p2 *= 2;
    }
    cout << res;
    return 0;
}