#include <bits/stdc++.h>

#define inf 0x7fffffff
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define all(c) c.begin,c.end
#define tr(c,it) for(typeof(c.begin())it=c.begin();it!=c.end();it++)
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define mod 1000000007
#define gc getchar

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> ii;
typedef vector<ii> vii;
typedef queue<int> qi;

int main()
{
    int n;
    int c;
    cin>>n;

    vi a(n); 
    ll ans=0;
    ll sum=0;

    FOR(i,0,n) 
    {
        cin>>a[i];
    } 

    sort(a.rbegin(),a.rend());

    FOR(i,0,n) 
    {
        ll k=1;

        FOR(j,0,i) 
            k=(2*1ll*k);

        sum+=(k*1ll*a[i]); 
    } 

    cout<<sum;
}