History of question #668881
| When | Who | Action | New State |
|---|---|---|---|
| Ke Chen | Give more information | Open | |
| Roman Podolyan | Answer | Answered | |
| Ke Chen | Reopen | Open | |
| Roman Podolyan | Answer | Answered | |
| Ke Chen | Reopen | Open | |
| Roman Podolyan | Answer | Answered | |
| Ke Chen | Confirm | Solved | |
| Ke Chen | Comment | Solved |
