Vacuous Truth. Since there is no 'x', then there is no instance of 'x' followed by anything other than 'y', therefore the condition still holds. Generally, most Katas assume a vacuous truth.

assertTrue(Kata.bestFriend("", 'x', 'y'), "for input: "", 'x', 'y'");

How this is returning True? in that case String txt is empty and there are no chars "x" followed by "y". Thus it should be False.
Explanation:
Since we are checking if "x" is followed by "y", if there is no "x", it can't return True.

Yes, for me too, since I'm not a native speaker and don't have a driver license :) Anywhay "lower or equal" approach is coorect.

Is a little confusing to think, to me too. But after some refactoring I completed this Kata. Think: you are speaking that 110 produces a fine and 100 no. It don't have sense.

80 <= 100 ok
100 <= 100 ok
110 is not < 100

Now you only have to calculate the fees :)

Came here to say this. I could not figure out why my test was failing. Then I just thought about it for a second. But, following the logic, it does fail.

Example (Speed=100, Signals=[110,100,80]-> 250)

output should be 350 since Speed == 100 and 110 and 80 both produce fines - 100 and 250.

Duplicate of the issue by Just4FunCoder, who was faster than me =P

Oh, almost at the same time we posted these issues, lol

• No random tests;
• Duplicate of "Nth Smallest Element" kata, being the specific version of it with N = 2.

1. No random tests.

2. Kata lacks novelty. Similar

All test are passing except n = 73567465519280238573;
Seems like a test issue, becasue all other TC are passing.

That's your code's problem, not a kata issue:

Python Completions 1990

Debug it. Somewhere in your code, you're trying to cast an empty string to an integer. That's what the error is about.