/**
*    author:  shu8Cream
*    created: 05.03.2021 21:24:27
**/

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i=0; i<(n); i++)
#define all(x) (x).rbegin(), (x).rend()
using ll = long long;
using P = pair<ll,ll>;
using vi = vector<int>;
using vvi = vector<vi>;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<ll> a(n);
    rep(i,n) cin >> a[i];
    sort(all(a));
    ll ans = 0;
    int j=0,cnt=0;
    rep(i,n){
        if(cnt>=pow(2,j)){
            j++;
            cnt=0;
        }
        cnt++;
        ans+=j*a[i];
    }
    cout << ans << endl;
}