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

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);
	}

	const int max = 1 << 15;
	bool ans[max] = {false};
	ans[0] = true;
	for (std::set<int>::iterator it = s.begin(); it != s.end(); ++it) {
		for (int j = 0; j < max; j++) {
			if(ans[j]) ans[j ^ *it] = true;
		}
	}

	int a = 0;
	for (int i = 0; i < max; i++) {
		a += ans[i];
	}

	std::cout << a << std::endl;
	return 0;
}