int getChannelRating(vector<int> &views)
{
    long long ans = 0;
    long long modd = 1e9 + 7;
    map<long long, long long> m;
    m[0]++;
    long long p = 0;
    vector<long long> pre(views.size());
    for (int i = 0; i < views.size(); i++)
    {
        p ^= views[i];
        if (i >= 2)
        {
            ans += m[p];
            ans %= modd;
            if (pre[i - 1] == p)
            {
                ans--;
                ans %= modd;
            }
        }
        m[p]++;
        pre[i] = p;
    }
    return ans;
}