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day13

This commit is contained in:
Gattix 2022-12-14 01:57:16 +01:00
parent b4855cb88e
commit f4779601c4
1 changed files with 12 additions and 12 deletions
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2022/day13/day13.hs
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@ -7,8 +7,7 @@ main :: IO ()
main = do
let toDigit = T.unpack . T.replace (T.pack "10") (T.pack ":") . T.pack
input <- map (map toDigit . lines) . splitOn "\n\n" <$> readFile "input"
print $
sum $ zipWith (*) [1 ..] $ map (fromEnum . isOrdered 0) input
print $ sum $ zipWith (*) [1 ..] $ map (fromEnum . isOrdered 0) input
let divider = ["[[6]]", "[[2]]"]
let sorted = sortBy mySort (divider ++ concat input)
print $ product $ map (+ 1) $ mapMaybe (`elemIndex` sorted) divider
@ -30,19 +29,20 @@ isOrdered _ [_, []] = False
isOrdered _ _ = True
addBrackets :: [String] -> [String] -> [String]
addBrackets [accl,accr] [l:ls,r:rs]
| l == r = addBrackets [l:accl,r:accr] [ls,rs]
| l `elem` ['0'..':'] && r `elem` ['0' .. ':'] = addBrackets [l:accl,r:accr] [ls,rs]
| l == '[' = addBrackets [l:accl,l:accr] [ls,r:rs]
| r == '[' = addBrackets [r:accl,r:accr] [l:ls,rs]
| l == ']' = addBrackets [accl,r:accr] [l:ls,rs]
| r == ']' = addBrackets [l:accl,accr] [ls,r:rs]
addBrackets [accl,accr] ["",rs]= map reverse [accl,reverse rs ++ accr]
addBrackets [accl,accr] [ls,""] = map reverse [reverse ls ++ accl,accr]
addBrackets [accl, accr] [l:ls, r:rs]
| l == r = addBrackets [l : accl, r : accr] [ls, rs]
| l `elem` ['0' .. ':'] && r `elem` ['0' .. ':'] =
addBrackets [l : accl, r : accr] [ls, rs]
| l == '[' = addBrackets [l : accl, l : accr] [ls, r : rs]
| r == '[' = addBrackets [r : accl, r : accr] [l : ls, rs]
| l == ']' = addBrackets [accl, r : accr] [l : ls, rs]
| r == ']' = addBrackets [l : accl, accr] [ls, r : rs]
addBrackets [accl, accr] ["", rs] = map reverse [accl, reverse rs ++ accr]
addBrackets [accl, accr] [ls, ""] = map reverse [reverse ls ++ accl, accr]
addBrackets _ acc = map reverse acc
mySort :: String -> String -> Ordering
mySort x y =
if isOrdered 0 (addBrackets ["",""] [x, y])
if isOrdered 0 (addBrackets ["", ""] [x, y])
then LT
else GT