#include<iostream>
#include<algorithm>
#include<math.h>
#include<cstring>
#include<iomanip>
#include<stdio.h>
#include<limits>
#include<unordered_map>
#include<set>
#include<list>
#include<vector>
#include<stack>
#define gcd __gcd
#define pb(x) push_back(x)
#define ll long long
#define in(x) scanf("%d",&x)
#define mod 1000000007
#define sz(x) x.size()
#define mst(x,a) memset(x,a,sizeof(x))
#define pii pair<ll,ll>
#define F first
#define S second
#define m_p make_pair
#define all(v) (v.begin(),v.end())
using namespace std;

int main()
{
    ios::sync_with_stdio(0);
    ll n;
    cin>>n;
    ll a[n];
    for(ll i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    ll help=1,ans=0;
    for(ll i=n-1;i>=0;i--)
    {
        ans+=help*a[i];
        help*=2;
    }
    cout<<ans<<endl;
    return 0;
}