Invariants

INMO
The Indian National Mathematics Olympiad is one of the greatest mathematical experiences. Four hours of deep thought and awesomeness.
When I gave the olympiad I didn't care of the outcome, in fact I was pretty sure I wouldn't be able to solve more than a single question, yet I was. Tomorrow will be a great day for anyone who has the opportunity to give that exam, and loves maths, to have enjoy. It is a blissful experience.
Don't worry about the result and do your best. And you'll know what I mean.
~H