#include <iostream>
#include <iomanip>
#include <vector>
#include <bitset>
using namespace std;

int main() {
    const int size = 40000;
    int n; cin >> n;
    vector<int> ns(n);
    for (auto &&x: ns) cin >> x;
    bitset<size+1> memo;
    for (int y = 0; y<(n+1); y++) {
        for (int x = 0; x<size+1; x++) {
            if      (y==0 && x==0) memo[x] = true;
            else if (y==0)         memo[x] = false;
            else memo[x] = memo[x] || (((x^ns[y-1]) < size) ? memo[x^ns[y-1]] : false);
        }
    }

    // for (int x = 0; x<25; x++) cout << setw(3) << x; cout << endl;
    // for (int x = 0; x<25; x++) cout << setw(3) << memo[x]; cout << endl;

    int cnt = 0;
    for (int x = 0; x<size+1; x++) cnt += memo[x];
    cout << cnt << endl;
}