Siddimaula

Yes, I think you should go, but you will set the agenda somewhat differently: you'll aim to solve those problems that you recognize and know you can solve and you will (beforehand) decide on what strategy you'll use for the rest of the problems. (The strategy on how to which answer to pick if you have absolutely no idea which one is the right one).

You can probably leave after lunch but if you're there you might as well sit it through. It could be your lucky day.