#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <limits>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <complex>

using namespace std;

#define INF (INT_MAX/3)
#define PI (2*acos(0.0))
#define EPS (1e-8)

typedef long long ll;
typedef unsigned long long ull;
map<pair<int, int>, int> e;

int N, A[5001];

int solve(int x, int i){
    if(e[pair<int, int>(x, i)] != 0) return 0;
    if(i == N){
        e[pair<int, int>(x, i)]++;
        return 1;
    }
    return e[pair<int, int>(x, i)] = solve(x, i + 1) + solve(x ^ A[i], i + 1);
}

int main(){
    ios_base::sync_with_stdio(0);
    cin >> N;
    for(int i = 0; i < N; i++) cin >> A[i];
    cout << solve(0, 0) << endl;
    return 0;
}