#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    int c[50];
    for(int i = 0; i < n; ++i) cin>>c[i];
    long long tim = 1;
    long long ans = 0;
    sort(c,c+n);
    for(int i = n-1; i >= 0; --i)
    {
        ans += tim*c[i];
        //cout<< ans << endl;
        tim *= 2;
    }
    cout<< ans << endl;
    return 0;
}