What the answer for:
1. (*(**)
2. (*54846)*)
3. *)
4. (**)*)
I think that:
1. NO
2. YES
3. NO
4. NO

What is the correct answer?

I tested on my AC solution:

1. YES.
2. YES.
3. NO.
4. NO.

On first test program should print NO, because you shouldn't consider nested comments.
(*(**) means that there is only one comment in the text and
second sequence of symbols (* is only text inside the comment.

Good luck!