#include<iostream>

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

	const int max = 1 << 15;
	bool ans[max] = {true};
	for (int i = 0; i < switches; i++) {
		int n;
		std::cin >> n;
		if(!ans[n]){
			for (int j = 0; j < max; j++) {
				if(ans[j]) ans[j ^ n] = true;
			}
		}
	}

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

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