| When | User | Flag Type | Description |
|---|---|---|---|
| 2012-04-22 22:55:39 | kevinwm | Needs Fixing | Valid solutions not covered. |
| 2013-10-19 03:45:29 | fujii hirosi | Well Constructed | |
| 2016-03-15 20:06:18 | XiJinping | Needs Fixing | bD2 works fine |
| 2017-08-25 10:11:44 | ranka | Needs Fixing | |
| 2017-10-02 03:41:56 | mdp05mimura | Well Constructed | |
| 2017-12-30 11:34:29 | Onishi T | Well Constructed | |
| 2018-09-25 19:57:25 | raimox | Well Constructed |