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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit f23f22d71c
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Task/Anonymous-recursion/Haskell/anonymous-recursion-2.hs Normal file
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import Data.Function (fix)
fib :: Integer -> Maybe Integer
fib n
| n < 0 = Nothing
| otherwise = Just $ fix (\f -> (\n -> if n > 1 then f (n-1) + f (n-2) else 1)) n