day1

day1/app/Main.hs

@@ -0,0 +1,14 @@
+module Main (main) where
+
+import Data.List (sort, transpose)
+import Text.Printf (printf)
+
+-- readFile "./inputs/day1" >>= \inputs -> let columns = map sort $ map (map (read :: String -> Int)) $ transpose $ map words $ lines inputs in printf "total distance: %d\n" (sum $ map abs $ zipWith (-) (columns !! 0) (columns !! 1)) >> printf "similarity score: %d\n" (sum $ map (\x -> x * (length $ filter (\y -> x == y) (columns !! 1))) (columns !! 0))
+
+main :: IO ()
+main = do
+  inputs <- readFile "./inputs/day1"
+  let columns = map sort $ map (map (read :: String -> Int)) $ transpose $ map words $ lines inputs
+
+  printf "total distance: %d\n" (sum $ map abs $ zipWith (-) (columns !! 0) (columns !! 1))
+  printf "similarity score: %d\n" (sum $ map (\x -> x * (length $ filter (\y -> x == y) (columns !! 1))) (columns !! 0))