#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
//libs
#include <iostream>
#include <algorithm>
#include <set>
#include <vector>
#include <string>
#include <map>
#include <complex>
#include <fstream>
#include <iomanip>
#include <cmath>
#include <queue>

using namespace std;
//defines
#define infll 8e18
#define ll long long
#define itn ll
#define vi vector<itn>
#define vvi vector<vi>
#define pii pair<itn,itn> 
//constants
const double eps = 1e-7;
const ll mod = 1000000007;
//end of definition

void solve()
{
  ll n;
  cin >> n;
  ll ans=0;
  vi a(n);
  for (int i=0;i<n;i++)
    cin >> a[i];
  sort(a.begin(),a.end());
  reverse(a.begin(),a.end());
  for (ll i=0;i<n;i++)
  {
    ans+=(1ll<<i)*a[i];
  }
  cout << ans << endl;


}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
	//freopen("input.txt", "w", stdout);
#endif
	solve();

	return 0;
}