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| -rw-r--r-- | 2021/10.hs | 43 | ||||
| -rw-r--r-- | 2021/10.in | 102 |
2 files changed, 145 insertions, 0 deletions
diff --git a/2021/10.hs b/2021/10.hs new file mode 100644 index 0000000..ab90d88 --- /dev/null +++ b/2021/10.hs @@ -0,0 +1,43 @@ +{-# OPTIONS -Wno-type-defaults #-} +module Main where + +import Data.List +import Data.Maybe + +import Input + + +closing :: Char -> Maybe Char +closing '(' = Just ')' +closing '[' = Just ']' +closing '{' = Just '}' +closing '<' = Just '>' +closing _ = Nothing + +score1 :: Char -> Int +score1 ')' = 3 +score1 ']' = 3 * 19 +score1 '}' = 3^2 * 7 * 19 +score1 '>' = 3^3 * 7^2 * 19 +score1 _ = 0 + +score2 :: Char -> Int +score2 = fromMaybe 0 . fmap succ . flip elemIndex ")]}>" + +data Result = SErr Char | Incomplete String | Ok + deriving (Show) + +parse :: String -> Result +parse = go [] + where go s (c : cs) | Just cl <- closing c = go (cl : s) cs + go (c:s) (c':cs) | c == c' = go s cs + go _ (c:_) = SErr c + go s [] = Incomplete s + +main :: IO () +main = do + inp <- getInput 10 + print $ sum [score1 c | SErr c <- map parse inp] + let middle l = sort l !! (length l `div` 2) + print $ middle [sum (zipWith (*) (reverse $ map score2 s) (iterate (*5) 1)) + | Incomplete s <- map parse inp] diff --git a/2021/10.in b/2021/10.in new file mode 100644 index 0000000..27355e5 --- /dev/null +++ b/2021/10.in @@ -0,0 +1,102 @@ +[<[{<[(([<[[{[()()]}]{<<<>[]>[()[]]>{(<>[]){<>[]}}}]<{(<()<>>{()<>})(<()>)}([{()[]}](<()<>> +<[(<({[<(<<({({}[])[<>]}[<<>{}>[()()]])>>)>]})>{[([({[{{<[[]{}]{{}}><{()[]}[{}]>}}{{[<<>()>((){}) +{<({([<([[<<[(<>())({}{})](<()()>{{}})>(([[]{}]<[][]>){<{}>{<>{}}})>]][[((<[<>()]<<>[]>>{{()[]}{[]{} +([{({<<{<<<{([{}[]]([]())){[(){}]}}{[<{}()>(<>[])]}][({[()<>][<><>]}{{{}[]}})<<<{}()>>>]>([[<[{}<>] +{([{({(<{[<(<(()()){{}()}>[(<><>)<<>[]>])[{{{}()}[(){}]}[<()[]>[{}[])]]>{([{{}{}}{[]}][{{}<>}{<><>}]){[[[]() +[{(([[{([(({(<{}()>({}<>))((()())(<>[]))}{<{{}[]}[{}()]>{{()()})})<{{([]{})[<>[]]}[{<>[]}{ +<<([{{({{{[(<[<>()][()<>]>)]}<(<<<<>()><{}()>>><({{}<>}{()[]}){<(){}>}>)>>})<[{[<([[{}{}]{{}()}] +<[{{[<[{(<<([([]{})]<[[]{}]{<>()}>)(<<<>{}>{{}[]]>(<[]()>(()[])))><<[{[][]}{[]}](([])([]))><({{}{}}{[][]}) +{{{({{{([<<<{[()]({}{})}((()[])<()<>>)>{{<{}<>><{}()>}}>(<<(())({}())>{{{}}({}())}>{<[{}<>]<{}{}>>[{<>()} +{<({<[{[<<{{[[[][]][<><>]](([]{})<()[]>)}<<((){})><[[][]](<><>)>>}{(<<{}<>><<>>><((){})([]<>)>)<(([]))( +({{{([({<((<<<()>[[]<>]>(<<><>>(()()))>))>})]){({[<[<<[[{}{}]][([]<>)]><{<{}()><()<>>}(<[][]>[{}()])]>{({{ +(<{<<[[[(<{<({<>()}{{}<>})<<()()>(<>[])>>(({{}()}([])))}>([[<({}())({}())]((<>{})<<><>>)][[<( +[([({{{[<([<[(<>[])[{}[]]]<[[]{}][<>]>>])<(((<()<>>(<>{}])({<>{}}[{}<>]))<([()()]{[]<>})({<>()}[{} +<(<<([{{[<((({<><>}<<>>)[[[]<>]({}())]){(<<>()>{[]()})[<()>{[][]}]})>]<[[[{(<>{})<(){}>}[{<>{}}]]]][ +{[[[{[(((<{[{([]{})[[][]]}(<{}()><<>[]>)][<[<>{}]>]}>({([(()())<[]{}>](([]{})[<>{}])][[{[]{}}<<>{}>]({{}}[<> +{{{([[<[({<<<({}{})<[]()>>[[<>[]>{<>[]}]>[({<>[]}({}<>))[[[]()][()<>]]]>})]>]<(<<<<[<((){})<{}{}>><{()()}(( 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