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[2024/05] Solve pt. 1 #11

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[2024/05] Solve pt. 1 #11

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33 changes: 33 additions & 0 deletions 2024_haskell/05Manual.hs
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Original file line number Diff line number Diff line change
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module Main where

import Data.List (isPrefixOf, isSuffixOf)
import Data.List.Split (splitOn)

-- import qualified Data.Map.Strict as Map

main :: IO ()
main = do
input <- readFile "05input"
let [rules, seqsInit] = map lines (splitOn "\n\n" input)
let seqs = map (splitOn ",") seqsInit
let validSeqs = filter (validate rules) seqs
let result = sum $ map getMiddle validSeqs
print result

readInt :: String -> Int
readInt = read

validate :: [String] -> [String] -> Bool
validate rules [] = True
validate rules (x : xs)
| all (anyRuleMatches (rulesForPage x rules)) xs = validate rules xs
| otherwise = False

rulesForPage :: String -> [String] -> [String]
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update signature [String]->String->[String]

rulesForPage rules x = filter (x `isPrefixOf`) rules

anyRuleMatches :: [String] -> String -> Bool
anyRuleMatches rules p = any (p `isSuffixOf`) rules

getMiddle :: [String] -> Int
getMiddle seq = readInt (seq !! div (length seq) 2)