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author | Orangerot <purple@orangerot.dev> | 2024-05-17 15:41:55 +0200 |
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committer | Orangerot <purple@orangerot.dev> | 2024-12-01 05:55:27 +0100 |
commit | 347d2f1fbce2d3927a32b3af818ab67943628568 (patch) | |
tree | fae9181a8f69a7f26f9fec10bb0941ad4e0f1edd /2023/day03/Main.hs | |
parent | a1895fe157e06ee4d119576163ea76390b3d402c (diff) |
Diffstat (limited to '2023/day03/Main.hs')
-rw-r--r-- | 2023/day03/Main.hs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/2023/day03/Main.hs b/2023/day03/Main.hs new file mode 100644 index 0000000..d9d8f4b --- /dev/null +++ b/2023/day03/Main.hs @@ -0,0 +1,28 @@ +import Data.Char +import Data.List + +-- findBegin :: ((Int, Int), Char) -> [((Int, Int), Char)] -> ((Int, Int), Char) +findBegin s@((x,y), c) dict = case filter (\(p,_) -> p == (x,y-1)) dict of + [] -> s + n:xs -> findBegin n dict + +main :: IO () +main = do + inputLines <- lines <$> getContents + + let distances = concat (map (\x -> (map (\y -> (x,y)) [-1..1])) [-1..1]) + + let numInputLines = zip [0..] (map (zip [0..]) inputLines) + let charCoords = concat (map (\(x, l) -> (map (\(y, c) -> ((x,y),c)) l)) numInputLines) + let symbols = map (\(p, c) -> p) (filter (\(_,c) -> not (c == '.' || isDigit c)) charCoords) + let digits = filter (\(_,c) -> isDigit c) charCoords + let serialChars = filter (\((x,y),_) -> any (\x -> elem x symbols) (map (\(x1,y2) -> (x + x1, y + y2)) distances)) digits + let serialBegins = nub $ map (\x -> findBegin x digits) serialChars + let serialNumbers = map (\((x,y), c) -> read (takeWhile isDigit (drop y (inputLines!!x))) :: Integer) serialBegins + -- print charCoords + -- print symbols + print (sum serialNumbers) + -- convert input to [((x,y), Char)] + + -- mapM_ putStrLn inputLines + |