Yeah

This can generate a small subset of the valid strings only.

Beautiful

Am I correct in saying that this wouldn't work if there were opening parentheses without closing parentheses to match it?

This one's my favorite. Very concise and readable. Nice

Please use spoiler flag next time. Because you did integer division there. That's how Ruby's division work.

poetic

This is a clever solution but not too optimal because is calculating the same value value.to_s.size every time

calculate("Morgainstern has 3 edge cases and gains 1")

:^)

Can someone please explain me this as I am a beginner and I am having hard time trying to understand this and how it is working. Thanks.

I learned a lot about sum method here. I never even thought about it taking a block. Awesome!

Lovely!! 😁
I'm so glad I could come up with the exact same algo! 😁

So this is how to deal with the zeroes! Nice