#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int N, A[50505], sum;

int main() {
  cin >> N;
  for (int i = 1; i <= N; i++) cin >> A[i];
  sort(A + 1, A + N + 1, greater<int>());
  int i = 1;
  for (int k = 0; ; k++) {
    for (int j = 0; j < (1 << k); j++) {
      sum += k * A[i];
      i++;
      if (i > N) break;
    }
    if (i > N) break;
  }
  cout << sum << endl;
  return 0;
}