You are right. However, it's not an issue and the input comes from the random tests can be read by the test class. I changed it anyway.

I added the random tests but couldn't publish it so I tried to delete it but didn't have the access to do it. first world problems... :(

Thanks dolamroth! I didn't know how to do it and now having a look at it!

Nice solution, grats! However to challenge myself more and to please the Pure Python Gods, I rigorously avoid using imported modules unless the question specifies to do so (like in regex challenges)! And surely in the industry, I prefer yours to save time & money :D It's just nice to see these kind of solutions and also the pure python version (2nd best solution) down below. Oh btw, mine is the worst solution probably :(

I always get excited after finding the solution and when I come here and see such one-line codes... *sigh*
Joking aside, it's quite instructional. Thanks!