Though I have not yet started this contest, one of my roommates was doing this question , and by an extremely wrong approach got full 100 marks , and I was left astounded .
If I am allowed to reveal , then I can mention some test cases where many submissions will fail if they are using same logic as of my roommate .
It is my request to admin as well as tester to please look into the matter , and rejudge the solutions.
Edit :- Thanks a lot admin and tester for changing the test cases . Also , I couldn’t understand why many people downvoted this post