#include "bits/stdc++.h"
using namespace std;

int main() {
	static int N, A[5000], COUNT = 0;
	static bool DP[5010][32768] = {};
	DP[0][0] = true;
	cin >> N;
	for (int i = 0; i < N; i++) cin >> A[i];
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < 32768; j++) {
			if (DP[i][j]) {
				DP[i + 1][j ^ A[i]] = true;
				DP[i + 1][j] = true;
			}
		}
	}
	for (int i = 0; i < 32768; i++) {
		if (DP[N][i]) COUNT++;
	}
	cout << COUNT << endl;
}