I’ve solved the first Medium puzzle with both Python variants and I achieved 100% by means of the verification algorithm.
Though the third achievement (more than 50 links remaining) is not shown to be achieved although in testing interface I managed to get 52 links remaining. Multiple tests showed always the same result: 52. But after submitting the overview screen show completely different behavior and deletes way more links. Therefore I do not get the third achievement. Why is that?