#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;
//using mint = modint1000000007;
//using mint = modint998244353;



int main(){
  int N;
  cin >> N;
  vector<ll> v(N);
  rep(i,N) cin >> v[i];

  sort(ALLOF(v));
  reverse(ALLOF(v));

  ll ret = 0;

  ll f=0;
  ll c=1;
  rep(i,N){
    ret += v[i] * f;
    c--;
    if(c == 0){
      f++;
      c = 1<<f;
    }
  }

  cout << ret << endl;
  
  return 0;
}