AoC 2023HEADmain

1 files changed, 43 insertions, 0 deletions

diff --git a/2023/day02/Test.hs b/2023/day02/Test.hs
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--- /dev/null
+++ b/2023/day02/Test.hs
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+import Data.Char (isDigit, isSpace)
+
+data Color = Red | Green | Blue deriving (Show, Eq)
+
+-- Parse a single digit
+digit :: Char -> Maybe Int
+digit c
+  | isDigit c = Just (read [c])
+  | otherwise = Nothing
+
+-- Parse an integer
+-- Parse an integer
+parseInt :: String -> Maybe Int
+parseInt str = case reads str of
+  [(num, "")] -> Just num
+  _           -> Nothing
+
+-- Parse color
+parseColor :: String -> Maybe Color
+parseColor "red"   = Just Red
+parseColor "green" = Just Green
+parseColor "blue"  = Just Blue
+parseColor _       = Nothing
+
+-- Parse the entire input string
+parseInput :: String -> Maybe Bool
+parseInput input = do
+  let (numStr, rest) = span (\c -> isDigit c ) input
+  num <- parseInt numStr
+  let colorStr = dropWhile isSpace rest
+  color <- parseColor colorStr
+  case color of
+    Red   -> pure (num < 12)
+    Green -> pure (num < 13)
+    Blue  -> pure (num < 14)
+
+main :: IO ()
+main = do
+  putStrLn "Enter input (e.g., '10 red'):"
+  input <- getLine
+  case parseInput input of
+    Just result -> putStrLn $ "Result: " ++ show result
+    Nothing     -> putStrLn "Invalid input."