I need your advice for getting intuition faster in codeforces problem?

problem like this Problem - 1492D - Codeforces

I would suggest you to always think of a simpler version of any (mostly a constructive type) problem and then go to the current version (given in the problem). This works for most ad-hoc, constructive or greedy problems.

And a very important advice

Read the problems carefully.
I am saying this because, the problem you mentioned, I couldn’t solve because I read it wrong. And it feels really sad :slightly_frowning_face:.