Try this one maybe:

https://www.codewars.com/kata/5e297e9f63f1db003317cbac

The same kind of reasoning is needed to solve it (Dynamic Programming), but maybe this problem is a bit easier.

I think that the difference of difficulty between them is not that large, but it's 6 kyu instead of 4, so we'll trust the website's ranking.

Quite often with the harder katas it's not really matter of "optimization" as such (making your algorithm run faster), but instead of finding a completely different approach that is faster.

The advice above is solid. If you are new to coding you probably shouldn't be doing 4 kyu katas. Start at easier ones and then climb from there.

i am new too, do lower katas then gradually attempt higher, you will understand i think!! i've solved it but 1 months ago i wouldn't have!

My code works fine for small and med pyramids but for large pyramids it says execution timed out (12000 ms) I am new at coding so i understand my code is not so efficent. how can i optimize my code