static long getChannelRating(List<Integer> views) {
        long ans = 0;
        long modd = 1000000007;
        Map<Long, Long> m = new HashMap<>();
        m.put(0L, 1L);
        long p = 0;
        List<Long> pre = new ArrayList<>(views.size());

        for (int i = 0; i < views.size(); i++) {
            p ^= views.get(i);

            if (i >= 2) {
                ans += m.getOrDefault(p, 0L);
                ans %= modd;

                if (views.get(i) == 0) {
                    ans--;
                }

                if (views.get(i).equals(views.get(i - 1))) {
                    ans--;
                }

                if (ans < 0) {
                    ans += modd;
                }
            }

            m.put(p, m.getOrDefault(p, 0L) + 1);
            pre.add(p);
        }

        return (int)ans;
    }