From 882d190030a39f5c854d590c1c18a469c4ae009a Mon Sep 17 00:00:00 2001
From: eriedaberrie <eriedaberrie@gmail.com>
Date: Mon, 11 Dec 2023 22:33:07 -0800
Subject: [PATCH] 2023 day 12: star 1

---
 2023/12/Main1.hs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 2023/12/Main1.hs

diff --git a/2023/12/Main1.hs b/2023/12/Main1.hs
new file mode 100644
index 0000000..bacf4fa
--- /dev/null
+++ b/2023/12/Main1.hs
@@ -0,0 +1,22 @@
+import Control.Applicative (liftA2)
+import Data.List (group)
+import Data.List.Split (splitOn)
+
+matchesConsecutive :: [Int] -> String -> Bool
+matchesConsecutive xs = (== xs) . map length . filter ((== '#') . head) . group
+
+allSprings :: String -> [String]
+allSprings = foldr (liftA2 (:) . getChars) [""]
+  where
+    getChars c = if c == '?' then ['.', '#'] else [c]
+
+solve :: [Int] -> String -> Int
+solve records = length . filter (matchesConsecutive records) . allSprings
+
+parseLine :: String -> ([Int], String)
+parseLine l = (map read . splitOn "," $ y, x)
+  where
+    (x:y:_) = splitOn " " l
+
+main :: IO ()
+main = print . sum . map (uncurry solve . parseLine) . lines =<< readFile "data.txt"