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

int main() {
	int switches;
	std::cin >> switches;

	std::set<int> s;
	for (int i = 0; i < switches;i++){
		int num;
		std::cin >> num;
		s.insert(num);
	}

	std::set<int> ans = s;
	ans.insert(0);
	for (std::set<int>::iterator it = s.begin(); it != s.end(); ++it) {
		std::set<int>::iterator e = ans.end();
		for (std::set<int>::iterator jt = ans.begin(); jt != e; ++jt) {
			ans.insert(*it ^ *jt);
		}
	}

	std::cout << ans.size() << std::endl;
	return 0;
}