# include <bits/stdc++.h>
# define maxn 100005
# define ll long long
# define clock (clock() * 1000.0 / CLOCKS_PER_SEC)
# define rc(s) return cout << s,0
# define _ ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
# define pb push_back
# define mp make_pair
# define int ll
using namespace std;
int32_t main(){_
    //freopen("input","r",stdin);
    int n;
    vector<int>vec;
    cin >> n;
    while(n--)
    {
        int x;
        cin >> x;
        vec.pb(x);
    }
    int ans = 0,k = 0;
    sort(vec.rbegin(),vec.rend());
    for(auto it : vec)
    {
        ans += 1LL * it * (1LL << k);
        k++;
    }
    rc(ans);
}