Slow but nice and simple.

And after that, try to do it with only one single pass over the input! That is, look at each character only once. ;-)

junior code =D

Since 3.10 you can use match instead of if

Solid code: easy to read, easy to maintain. Underrated sollution.

Glad im not the only one who went this route

I did the same thing! :)

Test cases seems weak as most people solution are O(N^2). As a fun little challenge try to solve in O(N) complexity

Nice solution! Very easy to understand.