What's wrong here in this problem Paint Cost ?

Question

https://www.sololearn.com/post/205650/?ref=app

Answer 1

Just solved in c
Changed nothing but the syntax only :/

Answer 2

Maybe the same trouble I was having?

https://www.sololearn.com/discuss/2104980/?ref=app

EDIT: If the downvoter cared to just tell what they're disagreeing with, we might even learn something. 🙄