It's your responsibility to explain 100% of the problem, you can't just provide a link to the wiki

This is not the case. Here the description of the task and its essence do not coincide. The description is not complete. У меня каты от автора g964 шли подряд, и я устал тратить по 30 минут на понимание чего от меня хотят. У автора уникальная способность обьяснять простые вещи через одно место. Раньше я думал это перевод так шакалит текст, но на g964 вечно в коментах жалуются

Another Kata from the author, where the most difficult part is understanding what needs to be done. I suggest CodeWars add a filter on Kata by author to avoid g964

Terrible description, after spending 20 minutes, I still didn’t understand what the author meant. What should happen in week 7? Zero? Again? It seems like it’s customary to use international units on the site, but the author starts the week on Sunday... Another Kata “Copy the formula from the Internet”

The description must be understandable for foreigners. I spent all my time just clarifying the line “at most 2 times higher than the number”, maybe it’s worth rewriting this line

More test examples are needed, the link to the article does not work

It is completely unclear when to return null, you need to add examples or explanation

Don't waste your time, the terrible description plus no explanation leaves no chance

No tests, incomplete description

Just left this Kata, no explanation. If your kata is based on mathematics, some explanation is needed.

No tests, description not sufficient for solutions

No sample tests.

For foreigners, the description is as confusing as possible; absolutely nothing is clear. The examples do not show edge cases, and do not explain what needs to be done.

No description, no explanation, all there is is a link to Wikipedia. A kata can't be educational when all it has is a few examples and a link to a wiki.