This one surprised me in a good way. At first it feels purely arithmetic, but once you get into it, it becomes more about structuring a small pipeline of transformations — generating values, breaking them down, and accumulating results carefully. I like problems that combine number logic with digit‑level thinking. It’s compact, but it definitely rewards a clean and intentional approach. Thanks for the thoughtful challenge!

lol

this translation was rejected at some point, but the kata now has a Java version

Unfortunately those are the messages generated by the NUnit test framework. It is possible to add a custom assertion message, but it will be added on top of the existing one rather than replace it.

I did add a custom message with the input values, and I lowered the random tests' range that was generating absurdly long lists. Also, I'm not sure if it was the case before or if it is a result of the upgrade to C#12 + fluent NUnit assertions, but the messages do tell you a bit more:

...
  Values differ at index [0]
  Missing:  < 5, 10, 15... >

Combined with the changes I made, this should be enough to debug one's solution in C# for this kata.

Please don't post solutions in kata's Discourse.

JavaScript

an interesting kata to practice reduce :)

A good exercise, makes you think. You know the answer, it's just out of reach.

Go translation ^-^

the problem seems still to stay for Python.

When Kata starts "In this simple exercise", don't believe it

Fixed by OP

Approved

python new test framework is required. updated in this fork