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

using namespace std;

int main()
{
	int N;
	cin >> N;
	set<int> A;
	for( int i = 0; i < N; i++ ) {
		int tmp;
		cin >> tmp;
		A.insert(tmp);
	}
	set<int> dp;
	dp.insert(0);
	
	for( auto itr  = A.begin(); itr != A.end(); itr++ ) {
		set<int> tmp = dp;
		for( auto itr2  = dp.begin(); itr2 != dp.end(); itr2++ ) {
			tmp.insert( (*itr) ^ (*itr2) );
		}
		dp = tmp;
    }

	/*
	for( auto itr  = dp.begin(); itr != dp.end(); itr++ ) {
		cout << *itr << endl;
	}
	/**/
	cout << dp.size() << endl;
	return 0;
}