1. Server Request Log Analysis Given logs of server requests (`[server_id, time]`), a parameter `x`, and queries, determine how many servers did *not* receive a request in the time window `[query[i] - x, query[i]]` for each query. Return results for all queries. 2. Work Schedule Generation Given a 7-day work schedule pattern with `?` placeholders, a weekly hour target, and a daily hour limit, generate all valid schedules by replacing `?` with digits (0–8) such that the sum matches the target and no day exceeds the limit. Return sorted results. 3. Turnstile Scheduling A single turnstile is used for entrance/exit by people arriving at given times. Resolve conflicts (simultaneous arrivals) using priority rules based on the turnstile's prior state. Return the passage times for each person.