#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define MOD 1000000007



int main(){
  
  int n;
  cin >> n;
  vector<ll> a(n);
  rep(i,n)cin >> a[i];
  sort(ALL(a),greater<ll>());
  ll k = 1,l = 1,m = 0;
  ll res = 0;
  rep(i,n){
    if(l)res += m*a[i],l--;
    else {
      k <<= 1;
      l = k-1;
      m++;
      res += m*a[i];
    }
  }
  cout << res << "\n";
  

  return 0;
}