1 files changed, 34 insertions, 0 deletions
diff --git a/2023/day01/Main.hs b/2023/day01/Main.hs
new file mode 100644
index 0000000..5f31582
--- /dev/null
+++ b/2023/day01/Main.hs
@@ -0,0 +1,34 @@
+import Data.List
+import Data.Char
+
+-- isDigit :: Char -> Bool
+-- isDigit c = c >= '0' && c <= '9'
+
+wordDict = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
+
+findFirst :: String -> [String] -> Int
+findFirst [] _ = 0
+findFirst s@(x:xs) wordDict
+  | isDigit x = read [x]
+  | Just y <- elemIndex (take 3 s) wordDict = y
+  | Just y <- elemIndex (take 4 s) wordDict = y
+  | Just y <- elemIndex (take 5 s) wordDict = y
+  | otherwise = findFirst xs wordDict
+
+rev [] = []
+rev (x:xs) = rev xs ++ [x]
+
+main :: IO ()
+main = do
+  inputLines <- lines <$> getContents
+
+  let filterLines = map (filter isDigit) inputLines
+  let outerChars = map (\x -> [head x, last x]) filterLines
+  mapM_ putStrLn outerChars
+
+  let intList = map read outerChars :: [Int]
+  -- let intList = map (\x -> findFirst x wordDict * 10 + findFirst (rev x) (map rev wordDict)) inputLines
+  let result = sum intList
+
+  putStrLn $ show result
+