8 lines
280 B
Haskell
8 lines
280 B
Haskell
import Data.List (find)
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import Data.Ratio (Ratio, (%), denominator)
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fractran :: (Integral a) => [Ratio a] -> a -> [a]
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fractran fracts n = n :
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case find (\f -> n `mod` denominator f == 0) fracts of
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Nothing -> []
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Just f -> fractran fracts $ truncate (fromIntegral n * f)
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