27 lines
920 B
Haskell
27 lines
920 B
Haskell
import Data.List.Split
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import qualified Data.Map as M
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import Data.Ratio
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main :: IO ()
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main = do
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content <- parseContent <$> readFile "testinput1"
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print content
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parseContent :: String -> M.Map String [(String, Ratio Int)]
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parseContent = M.fromList . map (parseRecipe . splitOn " => ") . lines
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parseRecipe :: [String] -> (String, [(String,Ratio Int)])
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parseRecipe r = (result,ingredients)
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where parseIngredients = map (splitOn " ") . splitOn ", "
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left = parseIngredients $ head r
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right = concat $ parseIngredients $ last r
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result = last right
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resultDenom = read $ head right :: Int
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processIngredient n ing = (last ing,read (head ing) % n)
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ingredients = map (processIngredient resultDenom) left
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part1 :: M.Map String [(String, Ratio Int)] -> (String,Ratio Int) -> Ratio Int
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part1 _ ("ORE",x) = x
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part1 m (key,x) = x * sum (map (part1 m) (m M.! key))
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