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

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

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

	std::set<int> s;
	s.insert(0);
	std::set<int>::iterator it = v.begin();
	for (int i = 0; i < v.size(); i++) {
		for (int j = i; j < v.size(); j++) {
			int n = 0;
			std::set<int>::iterator it2 = it;
			for (int k = i; k <= j; k++) {
				n ^= *it2;
				it2++;
			}
			s.insert(n);
		}
		it++;
	}

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