#include<bits/stdc++.h>
#define NINF INT_MIN 
#define INF INT_MAX
#define ull unsigned long long
#define ld long double
#define ll long long
#define M 1000000009
#define REM 4
#define N 100005
#define pll pair<ll,ll>
#define pb(x) push_back(x)
#define mset(a) memset(a,0,sizeof(a))
#define sc(x)  scanf("%c",&x)
#define si(a)  scanf("%d",&a)
#define sl(a) scanf("%lld",&a)
#define f(i,n) for(i=0;i<n;i++)
#define foi(i,j,k) for(i=j;i<k;i++)
#define mll map<ll,ll>
#define foe(i,j,k) for(i=j;i<=k;i++)
 
#define dbg(x) cout<<#x<<"="<<x<<endl;
using namespace std;
int main()
{
  ll n,x,i,ans;
  vector<ll>v;
  cin>>n;
  for(i=0;i<n;i++)
  {
    cin>>x;
    v.pb(x);
  }
  sort(v.begin(),v.end());
  reverse(v.begin(),v.end());
  ans=0;
  for(i=0;i<n;i++)
  {
    ans=ans+pow(2,i)*v[i];
  }
  cout<<ans<<endl;
}