One of the areas I struggle with on Leetcode is poorly worded questions or questions with ambiguous examples that can lead you into thinking you've understood what is being asked when in fact you don't.

This kind of thing is likely to happen in a real interview as well so it's good practice, but in a real interview you'd want to ask clarifying questions.

One way that you could add this support would be to allow users to submit their question in the form of an example input and an expected output and have the official grading algorithm tell you if your test case is correct or not.