| When | User | Flag Type | Description |
|---|---|---|---|
| 2015-06-02 04:51:14 | Siaubunas | Well Constructed | |
| 2015-08-30 01:09:41 | InExtremis | Needs Fixing | potential missing solutions |
| 2015-11-11 08:57:37 | Aristotle | Well Constructed | |
| 2017-10-01 01:34:27 | Onishi T | Well Constructed | |
| 2018-03-21 13:19:43 | sunchin | Needs Fixing | other solutions |
| 2020-10-11 10:45:47 | 飛鏢小辣椒 | Well Constructed |