#include <iostream>
#include <vector>
using namespace std;

#define MOD(N) ((N) % 1000000009)

int N;

typedef long long ll;

vector<ll> a;

int main()
{
	cin >> N;

	for(int i = 0;i < N;i++)
	{
		ll t;
		cin >> t;
		a.push_back(t);

	}
	
	int sz = N;
	while(sz - 4 >= 1)
	{
		for(int i = 0;i + 4 < sz;i++)
		{
			a[i] = MOD(a[i] + 4 * a[i + 1] + 6 * a[i + 2] + 4 * a[i + 3] + a[i + 4]);
		}
		

		sz -= 4;
	}
	
	while(sz > 1)
	{
		for(int i = 0;i < sz - 1;i++)
		{
			a[i] = MOD(a[i] + a[i + 1]);
		}
		sz--;
	}

	cout << a[0] << endl;
	return 0;
}