I'm curious about that too. Could you show your solution?

me too

I feel like crying on myself after seeing a solution like this

It doesnt work for '1234\n' (says True). Will have to use \A and \Z, not ^ and $

That simple and elegant "set" function . I keep missing it in my logics.

thank you very much. I had no prior familiarty with regex and tbh I'm still a total noob in this whole programming think. thank you for the effort tho. It was really helpful and informative.

I don't get it at all

Why is this solution so fast? It my understanding s1.count(c) and s2.cound(c) take O(n) to execute, and we repeat it multiple times (up to 26). However my solution with a counter dictionary takes only O(n), but overtimes.

damn regexers always shining through everything ;D

Cool, two good solutions for this problem. Thanks guys!

no idea how you did that cool link stuff

you mean like this?
Like this: [title](https://www.url.com) -- markdown syntax

awesome, just found it in the documentation also
https://docs.python.org/2/library/re.html#raw-string-notation

no idea how you did that cool link stuff