My AC solution (#4995269) doesn’t work on some fairly simple test cases (if needed, I can post them here). I have fixed the bug in my code, and I still have AC, but I think that you should update the test cases for this problem, since they are really weak and allow some completely wrong codes to pass.
Regards, RandomUsername
Write your test cases to feedback@codechef.com they will add the test cases I believe (if those are valid) 
Do not discuss test cases here
Can you share your test cases? You sent it to admins? What was the reply?
Yea even i am interested 
as far as i can say, there aren’t any corner cases in this one! fairly simple problem! direct algo implementation.