Me slowly and happily getting started with A rated problems.

Me registering for my very first Div.3 contest with the sole purpose of solving problem A, and all I hear since then is rollback, what the heck is this!!!!

The moment I understand a new vocab there is another one knocking at my door, heyyy!! I'm the new one let's get acquainted ,nahhhh man I'm already in a meeting with 5 others.