#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define ff first
#define ss second
#define present(m,v) (m.find(v)!=m.end())
#define INF 1e18
#define mod 1000000007
#define lim 1000001
#define sz(a) int(a.size())
#define all(x) (x).begin(), (x).end()
#define rep(i,n) for(i=0;i<n;i++)
#define forn(i,a,b) for(i=a;i<b;i++)

bool fun(ll a, ll b)
{
    return a>b;
}

int main()
{
	ll n,i,ans=0;
	cin>>n;
	vector<ll> c(n,0);
	for(i=0;i<n;i++)
        cin>>c[i];
    sort(all(c),fun);
    for(i=0;i<n;i++)
        ans+=c[i]*pow(2,i);
    cout<<ans;
	return 0;
}