| When | User | Flag Type | Description |
|---|---|---|---|
| 2010-12-01 15:25:04 | Woozle | Needs Fixing | Why D1 instead of C2 is considered as wrong? |
| 2013-04-16 00:35:46 | SoDesuKa | Well Constructed | |
| 2013-06-21 01:07:46 | Matrok | Well Constructed | |
| 2013-12-28 17:48:22 | DerTimmeda | Well Constructed | |
| 2014-10-27 21:13:52 | raimox | Well Constructed | |
| 2015-06-08 09:32:32 | Siaubunas | Well Constructed | |
| 2017-05-06 12:26:13 | ranka | Needs Fixing | |
| 2020-10-31 05:43:37 | GameCarpenter | Invalid | Having kosumi-tetsuji in the prompt text, is literally saying the answer is F2 in a foreign language. It invalidates the problem and its difficulty rating. |