@biryaaniii Honestly I'm not that good myself.
Most common advice which is the fundamental truth is to solve more problems and most importantly give yourself time to solve the problem. I know the "Editorial" button is luring but you have to come up with your own ideas before checking it.
Had a little bit better performance on Codeforces Div. 4 Round. Solved 6/7 problems. I hope it's enough to become specialist! :D
If it's not enough, I will work harder anyway >:)