From: Mart Lubbers <mart@martlubbers.net>
Date: Sat, 19 Dec 2020 17:52:13 +0000 (+0100)
Subject: 19
X-Git-Url: https://git.martlubbers.net/?a=commitdiff_plain;h=6c50879055ce68f1885f48104591a45d00a6fe16;p=aoc20.git

19
---

diff --git a/13/input b/13/input
new file mode 100644
index 0000000..8875fc8
--- /dev/null
+++ b/13/input
@@ -0,0 +1,2 @@
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diff --git a/19/input b/19/input
new file mode 100644
index 0000000..8fec690
--- /dev/null
+++ b/19/input
@@ -0,0 +1,514 @@
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+aaaabbababbbaabbbababbbbaaababbbabbaabab
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diff --git a/19/one.icl b/19/one.icl
new file mode 100644
index 0000000..8bff425
--- /dev/null
+++ b/19/one.icl
@@ -0,0 +1,50 @@
+module one
+
+import StdEnv
+import Data.Either
+import Data.Func
+import Data.Functor
+import Data.List
+import Data.Maybe
+import Data.Tuple
+import Control.Applicative
+import Control.Monad => qualified join
+import Text
+import Text.Parsers.Simple.ParserCombinators
+
+read :: *File -> [Char]
+read f
+	# (ok, c, f) = freadc f
+	| not ok = []
+	= [c:read f]
+
+Start w
+	# (io, w) = stdio w
+	= case split ['\n\n'] $ read io of
+		[gram,ip] = case parse pGram gram of
+			Right gram
+				= (both gram ip, both
+					[(8, [[Left 42], [Left 42,Left 8]])
+					,(11, [[Left 42, Left 31], [Left 42, Left 11, Left 31]]):gram] ip)
+where
+	both gram = length o rights o map (parse $ toParser 0 gram) o split ['\n'] o trim
+
+toParser :: Int [(Int, [[Either Int Char]])] -> Parser Char [Char]
+toParser i m = foldr (<|>) empty $ map (fmap flatten o sequence o map toP) $ fromJust $ lookup i m
+where
+	toP (Left i) = toParser i m
+	toP (Right c) = (\x->[x]) <$> pToken c
+
+pGram :: Parser Char [(Int, [[Either Int Char]])]
+pGram = pSepBy1
+	(tuple <$> pInt <* pStr [': '] <*> pSepBy1
+		(pSepBy (Left <$> pInt <|> Right <$> pChar) (pToken ' '))
+		(pStr [' | ']))
+	(pToken '\n')
+
+pInt :: Parser Char Int
+pInt = toInt o toString <$> some pDigit
+pChar :: Parser Char Char
+pChar = pToken '"' *> pAlpha <* pToken'"'
+pStr :: ([Char] -> Parser Char [Char])
+pStr = sequence o map pToken