Thank you for praising my kata, it was very pleasant to read it. All the best to you!

Thanks for finding the issue, I found and fixed it.

Input strings include "undefined" substrings likely produced by a broken input generator.

Yes, it's strange setup for JS, but it works as is. I'm inclined to close the issue just because there's too many solutions already submitted using this setup.

thx. fixed

thx:3

*Cool kata))

Thanks for the advice, fixed!

Giving hints is not even that necessary I think, but don't force people to Train to see examples.

Give the example tests in the Description.

This is really an issue

the probability that during the passage of one stop the controllers will check his ticket is 1%

It is not clarified how "being caught" works, and the reference solution assumes that each station is independent of each other, which is not how typically these problems are posed.