#include <bits/stdc++.h>

#define F first
#define S second
#define llong long long
#define ullong unsigned long long
#define mp make_pair
#define pb push_back
#define pii pair <int, int>
#define sz(v) (int)v.size()
#define pt pair <double, double>
#define x first
#define y second
#define matrix vector <vector <int> >

using namespace std;

const int MXN = (int)3e6 + 10;
const int INF = (int)1e9 + 7;
const llong LINF = (llong)1e18 + 10;
const double EPS = (double)1e-6;
const double PI = (double)acos(-1.0);

int n, a[MXN];
llong ans;

int main(){
  #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
  #endif
  cin >> n;
  for(int i = 0; i < n; ++i){
    cin >> a[i];
  }
  sort(a, a + n, greater <int>());
  for(int i = 0; i < n; ++i){
    ans += 1LL * a[i] * (1LL << (1LL * i));
  }
  cout << ans;
  return 0;
}