| When | User | Flag Type | Description |
|---|---|---|---|
| 2010-03-08 20:50:18 | SeerRus | Well Constructed | |
| 2012-10-10 08:16:57 | daxiao | Well Constructed | |
| 2013-04-20 03:30:30 | tsukika | Well Constructed | |
| 2014-10-15 16:55:05 | eurikano | Well Constructed | |
| 2015-03-26 22:55:30 | Veral42 | Invalid | valid solutions marked wrong, no indication given in problem of intended cut with multiple cutting points giving valid positive results |
| 2020-05-15 19:29:12 | xruff | Well Constructed |