[Leetcode design] heap and monitor service

In LeetCode design, it talks about to use Skip List or BST for dashbaord sorting, could we use heap for sorting?

Also in class , it does not mention scability and monitor service. Would monitor service be optional for system design? Also should we talk about scability for this design?

Thanks

这里需要完整排序,用 Heap 只能有效维护前几名,不太合适。

最好是都讨论一下。Leetcode 这两方面都比较常规,就没有特别提到。