Packages have nonnegative integer IDs starting at `0`, but they may be received out of order. Support two operations: - `receive(id)` records that package as received. Receiving the same ID again is idempotent. - `status()` reports the largest received ID and the ascending IDs missing from `0..largest_received_id`. Before any package is received, the largest ID is `-1` and the missing list is empty. For console evaluation, implement `package_statuses(operations)` with homogeneous two-integer operation rows: - `[0, id]` means `receive(id)`. - `[1, 0]` means `status()`; the second value is padding. Return one flat integer list for each status call: `[largest_received_id, missing_id_1, ..., missing_id_m]`. Before any receipt, this record is `[-1]`. The full return type is therefore a portable list of integer lists. ### Constraints - At most `200000` operations are supplied. - `0 <= id <= 200000` - The total number of IDs returned across all status calls is at most `400000`. ### Example Operations `[[0,2], [1,0], [0,0], [1,0], [0,2]]` return `[[2,0,1], [2,1]]`. ```hint Distinguish the observed maximum from the contiguous prefix Receiving a large ID extends the range that status must describe, even when smaller IDs are missing. ``` ```hint Output cost is unavoidable A status call that returns many missing IDs takes at least proportional time; keep updates efficient and iterate missing IDs in sorted order. ```