#include <iostream>
#include <cstring>
using namespace std;
const int lim = 1 << 15;

bool dp[2][lim];
int main(){
	int N;
	cin >> N;

	int cur = 0, nxt = 1;
	dp[cur][0] = true;
	for(int t=0;t<N;t++){
		int A;
		cin >> A;
		memset(dp[nxt], false, sizeof(dp[nxt]));
		for(int m=0;m<lim;m++){
			dp[nxt][m] |= dp[cur][m];
			dp[nxt][m ^ A] |= dp[cur][m];
		}
		swap(cur, nxt);
	}
	int res = 0;
	for(int m=0;m<lim;m++){
		res += dp[cur][m];
	}
	cout << res << endl;
	return 0;
}