14 lines
425 B
Haskell
14 lines
425 B
Haskell
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import Control.Arrow
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main :: IO ()
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main = do
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input <- map (head . words &&& read . flip (:) [] . last) <$> lines <$> readFile "input"
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print $ (\(x,y,z,d2) -> (x*y,x*d2)) $ day2 input (0,0,0,0)
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day2 :: [(String,Int)] -> (Int,Int,Int,Int) -> (Int,Int,Int,Int)
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day2 ((d,l):xs) (x,y,z,d2)
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| d=="forward" = day2 xs (x+l,y,z,d2+l*z)
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| d=="up" = day2 xs (x,y-l,z-l,d2)
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| d=="down" = day2 xs (x,y+l,z+l,d2)
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day2 [] x = x
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