47 lines
2.0 KiB
Haskell
47 lines
2.0 KiB
Haskell
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import Data.List.Split
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import Data.List
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import qualified Data.Set as Set
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import Data.Maybe
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main = do
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content <- getContents
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let input = (lines content)
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putStrLn ( show (input !! 0))
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let input1 = Set.fromList (getCoordinates [] ( map getCommands (getList ( input !! 0))) (0,0))
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let input2 = Set.fromList (getCoordinates [] ( map getCommands (getList ( input !! 1))) (0,0))
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let listinput = getCoordinates [] ( map getCommands (getList ( input !! 0))) (0,0)
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let listinput2 = getCoordinates [] ( map getCommands (getList ( input !! 1))) (0,0)
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let intersects = input1 `Set.intersection` input2
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let results = Set.map (manhattan (0,0)) intersects
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let result = Set.findMin( results)
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let coordinate = Set.filter(\x-> ((manhattan (0,0)) x) == result) intersects
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let results2 = [(fromJust (elemIndex a listinput)) + (fromJust (elemIndex a $ listinput2)) | a<- (Set.toList intersects)]
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let result2 = minimum results2
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mapM putStrLn (map show( results2 ))
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getList :: String -> [String]
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getList = splitOn ","
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getCommands :: String -> (Char,Int)
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getCommands input = (op, number)
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where
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number = read (tail input)
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op = head input
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getCoordinates :: [(Int,Int)] -> [(Char,Int)] -> (Int,Int) -> [(Int,Int)]
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getCoordinates coordinates (('U',length):xs) (x,y) =
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getCoordinates (coordinates ++ [(x,y + i) | i<-[1..length]]) xs (x,y+length)
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getCoordinates coordinates (('D',length):xs) (x,y) =
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getCoordinates (coordinates ++ [(x,y - i) | i<-[1..length]]) xs (x,y-length)
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getCoordinates coordinates (('R',length):xs) (x,y) =
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getCoordinates (coordinates ++ [(x+i,y) | i<-[1..length]]) xs (x+length,y)
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getCoordinates coordinates (('L',length):xs) (x,y) =
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getCoordinates (coordinates ++ [(x-i,y) | i<-[1..length]]) xs (x-length,y)
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getCoordinates coordinates [] (x,y) = coordinates
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manhattan :: (Int,Int) -> (Int,Int) -> Int
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manhattan (x1,y1) (x2,y2) = abs(x1-x2) + abs(y1-y2)
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