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my comments are directly on the translation

Apparently it also need a reranking then. A 7 kyu should not have a performance requirement.

That said, only very naive solutions time out. I'm a bit torn on this one. With the mention of the input range, I would rather suggest not having the performance tag.

Haskell translation

Fixed.

Needs a performance tag or mention of upper limit of n. For 7kyu I'd expect to pass with a naive solution, but that times out.

Not readable.

cannot be changed