#include <bits/stdc++.h>
using namespace std;
int main(){
  int n;
  cin >> n;
  vector<int> A(n);
  for (int i = 0; i < n; i++){
    cin >> A[i];
  }
  sort(A.begin(), A.end(), greater<int>());
  vector<int> F(n);
  F[0] = 0;
  for (int i = 1; i < n; i++){
    F[i] = F[(i - 1) / 2] + 1;
  }
  long long ans = 0;
  for (int i = 0; i < n; i++){
    ans += A[i] * F[i];
  }
  cout << ans << endl;
}