I'm curious, what is the highest possible amount of states that a dp problem could have? Pls send me the problem link and the number of states.

I have seen many blogs about this, but I can't decide on what practice method is best. Could somebody give a good practice method?

I feel like I'm extremely weak on DP problems. Can somebody suggest a way to practice DP?

I am currently stuck on this problem: https://codeforces.com/contest/296/problem/C Any help would be appreciated. PS: I couldn't understand the editorial