Could you explain how you got 1201, because 2110 is the correct answer. You should make it so the digits are sorted in descending order (essentially a greater number comes before a lesser number, and we can see that your answer is incorrect as 1 comes before 2, but 2 is a greater digit

Let's just say the "state of the art statistical model" isn't really accurate.

(I'm presumming you are talking about cases such as n = 5, score = 7, but I'd say that's covered by the "If this is not possible, return -1" part, if you're referring to something else, please clarify in a comment)

There are times where the opponents given score is impossible.

I agree that Nothing or None is preferable to -1, but I just kept things consistent with the description.

That is the correct application of the English language. Just try saying a O(n), you sound like an absolute pillock greeting their mate Owen.

Anyway I fixed it.

I believe we should return Nothing in Haskell instead of -1. In fact, in Python it should also be better to return None.

I used "an" because the first syllable is a vowel sound, an personally sounds better to me. That being said, I can find both uses on google, and I don't think it's something to worry too much about, though I agree with Kayleigh that an O(n) is correct

What does it being notation have to do with anything? You still pronounce it as the letter O.

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Approved!

I think since O is not a full word, but instead a mathematical notation, that an does not apply. But who knows for sure ..

Haskell translation

It should be an O(1) as a native English speaker imo. Unless you're pronouncing O(1) as something other than Oh-one, which makes no sense.

A vs an is purely pronunciation based, eg an hour.

• "amount" (should be "number")

fixed