History of question #688870
| When | Who | Action | New State |
|---|---|---|---|
| Olivier Mattelaer | Answer | Answered | |
| Lailin Xu | Reopen | Open | |
| Olivier Mattelaer | Answer | Answered | |
| Lailin Xu | Comment | Answered | |
| Lailin Xu | Comment | Answered | |
| Olivier Mattelaer | Answer | Answered | |
| Lailin Xu | Comment | Answered | |
| Olivier Mattelaer | Answer | Answered | |
| Lailin Xu | Comment | Answered | |
| Olivier Mattelaer | Answer | Answered |
