#include <iostream>
#include <vector>
#include <set>
#include <algorithm>

using namespace std;

int main()
{
	set<int>data,data2;
	data.insert(0);
	int N,a;
	cin >> N;
	for (size_t i = 0; i < N; i++)
	{
		cin >> a;
		data.insert(a);
	}
	data2.insert(0);
	for (auto x : data)
	{
		for (auto y : data2)
		{
			data2.insert(x^y);
		}
	}
	cout << data2.size() << endl;
	return 0;
}