//SHUBHAM RANA says hello
#include <bits/stdc++.h>
#define sp " "
#define br "\n"
using namespace std;
typedef long long int ll;
typedef set<ll>::iterator si;
typedef map<ll,ll>::iterator mi;
const ll MOD=1000000007;
const ll INF=LLONG_MAX;
const double MU=0.000001;
const double PI=3.14159265359;
bool compare(const ll &a,const ll &b)
{
    return a>b;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	//freopen("input.txt","r",stdin);
	//freopen("output.txt","w",stdout);
	ll n;
	cin>>n;
	ll a[n];
	for(ll i=0;i<n;i++)
    {
        cin>>a[i];
    }
    sort(a,a+n,compare);
	ll res=0;
    for(ll i=0;i<n;i++)
    {
        res+=pow(2,i)*a[i];
    }
    cout<<res<<br;
	return 0;
}