Heya!!! I am Debayu, just got into 10th grade, have been doing olympiad math for a year now, and have really enjoyed it so far!! I also play a lot of football and am in my school football team also recently I have been learning about machine learning and stuff and it's really fun!! In this blog post, I am gonna walk you through some nice and instructive problems involving combinatorial processes and games which I personally really like so hope you enjoy it!! One common theme among problems involving processes and games is looking for some invariant or monovariant but often people end up blatantly chasing for invariants and monovariants only to realize that there doesn't exist one and even if it does its not natural. In this blog post we will emphasize more on understanding the process well in general and then make some observations to do stuff, sometimes looking at equality cases will help too. Problem 1(USAMO 1997 P4): To clip a convex - gon means to choos...