query regarding problem submission

during june challenge there was a question having code NEO01 when i submitted the solution for problem during contest it was showing wrong answer for one of the two subtasks but when i submitted the same solution for the same problem in the practice section after the contest it showed all clear .can anyone explain why ???

The test cases were fixed during the contest and the problems were rejudged. Try looking at it again, perhaps your contest problem also got full points.

If not, then give us links to both codes. Perhaps there must be some subtle difference which is causing the errors.

Can you provide the links to those submissions?