#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ull=unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

int N;
vector<ll> A;

int main(){
  scanf("%d",&N);
  A.resize(N);
  rep(i,N){ int a; scanf("%d",&a); A[i]=a; }
  ll ans=0;
  sort(A.begin(),A.end(),greater<ll>());
  rep(i,N){
    int f=0; while(i>=(1<<(f+1))-1) f++;
    ans+=A[i]*f;
  }
  printf("%lld\n",ans);
  return 0;
}