| When | User | Flag Type | Description |
|---|---|---|---|
| 2014-10-13 10:57:23 | raimox | Well Constructed | |
| 2017-11-07 06:18:43 | DangerMouse | Invalid | too many escape points for black make this problem invalid/unsolvable. |
| 2020-04-17 22:06:19 | morvan01 | Well Constructed | |
| 2022-07-31 12:52:51 | ranka | Well Constructed |