On many problems, I think of the solution very quickly but often spend a long time fixing and debugging the code to do what I want. For https://codeforces.net/problemset/problem/1973/B, I thought of a sliding window technique to find all windows that satisfy the or condition which is O(n). Yet, it took me like an hours and multiple failed submissions to get an AC. Right now, it feels like I have the "brains"(ingenuity) but not the "brawn"(implementation skills) right now. Furthermore, when I'm spending more time debugging than constructing it feels like I'm somewhat wasting my time(also its not very fun lol). What should I do?

P.S: I know someone is going to comment on how long I have been doing cp. Yes, I have only being doing cp for 1.5 months, and yes I know my implementation will naturally get better over time. Still, I'm looking for any advice BESIDES that. Thank you.