| When | User | Flag Type | Description |
|---|---|---|---|
| 2014-06-24 15:20:30 | mountain root | Well Constructed | |
| 2014-10-01 20:53:40 | eurikano | Well Constructed | |
| 2015-08-17 10:23:36 | salamanca | Well Constructed | |
| 2016-09-11 09:02:22 | Sollies | Well Constructed | |
| 2017-01-30 19:33:04 | Mozhuu | Invalid | bad solution |
| 2021-02-05 19:29:32 | go4242 | Well Constructed |