-- AOC 2025 - Sander -- so for those wondering about how I run this Haskell code, here's the setup: -- 1) install GHCup as instructed from https://www.haskell.org/ghcup/ -- 2) save this haskell file and your AOC input file in some directory on your computer -- 3) rewrite the "main" function with the location of your AOC input file -- 4) rewrite "print contents" in the "main" function to use the function(s) you've made to process the input file ("contents") from that day correctly -- 5) run Command Prompt, go to the directory of your files (with "cd" command) and run the command "ghci AOC2025.hs" -- 6) run command "main" -- 7) if your functions are correct, you'll get the correct answer! import System.IO import Control.Monad main :: IO() main = do handle <- openFile "C:/Users/[your directory here]/d1.txt" ReadMode contents <- hGetContents handle print contents hClose handle -- Day 1: ... -- Part One doday1_1 :: String -> String doday1_1 input = undefined -- Part Two doday1_2 :: String -> String doday1_2 input = undefined