History of question #15
| When | Who | Action | New State |
|---|---|---|---|
| Alexander Domanski | Answer | Open | |
| Herman Bos | Answer | Open | |
| Herman Bos | Answer | Open | |
| Herman Bos | Answer | Open | |
| Herman Bos | Answer | Open | |
| Herman Bos | Answer | Open | |
| Herman Bos | Answer | Open | |
| David Oftedal | Answer | Open | |
| David Mandelberg | Answer | Open | |
| ZhengPeng Hou | Answer | Open | |
| Noahs.hub | Comment | Open | |
| senthilkumark | Comment | Solved |
