#include <iostream>

using namespace std;
constexpr int MAXN = 32768;

int main()
{
    int n;
    bool b[MAXN] = {0};
    b[0] = true;
    cin >> n;
    int a;
    for(int i = 0; i != n; ++i){
        cin >> a;
        for(int j = 0; j != MAXN; ++j) if(b[j]) b[j ^ a] = true;
    }
    int result = 0;
    for(int j = 0; j != MAXN; ++j) result += b[j];
    cout << result << endl;
    return 0;
}