/*input
3
1 2 3
*/
#include <bits/stdc++.h>
#include <inttypes.h>
#define pb push_back
#define mp make_pair
#define endl '\n'
#define sp " "
#define fi first
#define se second
#define MOD 1000000007
#define N 1
#define int long long
#define lnode (node<<1)
#define rnode ((node<<1)+1)
#define mid ((l+r)>>1)
using namespace std;
typedef pair<int, int> ii;
typedef long long ll;

int n, a, ans;
vector<int> v;

signed main()
{
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n;
	for(int i=0; i<n; ++i)
		cin >> a, v.pb(a);
	sort(v.begin(), v.end(), greater<int>());
	for(int i=0; i<n; ++i)
		ans += (1ll<<i)*v[i];
	cout << ans << endl;
	return 0;
}