#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <algorithm>
#include <cmath>
#include <string>

using namespace std;

typedef long long LL;

#define range(i,a,b) for(int i=(a); i < (b); i++)
#define rep(i,n) range(i,0,n)

#define MAX_INT 2147483647
int main(){
	int N, M = 1<<15, ans = 0;
	vector < vector <int> > dp;   
	cin >> N;
	LL A[N];
	dp = vector <vector <int> >(N, vector <int> (M, 0)); 
	rep(i,N) cin >> A[i];
	dp[0][0] = 1;
	dp[0][A[0]] = 1;
	rep(i,N-1){
		rep(j,M){
			if(dp[i][j]){
				dp[i+1][j] = 1;
				dp[i+1][j^A[i+1]] = 1;
			}
		}
	}
	rep(i,M) ans += dp[N-1][i];
	cout << ans << endl;
	return 0;
}