Removed needless directory

[advent-of-code-16.git] / adventofcode16 / app / advent18f.hs

diff --git a/adventofcode16/app/advent18f.hs b/adventofcode16/app/advent18f.hs
deleted file mode 100644 (file)
index d1650e6..0000000
--- a/adventofcode16/app/advent18f.hs
+++ /dev/null
@@ -1,50 +0,0 @@
-module Main(main) where
-
-import Data.List (tails, foldl')
-
--- input = "..^^."
--- input = ".^^.^.^^^^"
-input = "^.^^^.^..^....^^....^^^^.^^.^...^^.^.^^.^^.^^..^.^...^.^..^.^^.^..^.....^^^.^.^^^..^^...^^^...^...^."
-
-main :: IO ()
-main = do 
-        part1 
-        part2
-
-part1 :: IO ()
-part1 = print $ fst $ foldl' nextRowFold (countSafe row, row) [2..40]
-    where row = readRow input
-
-part2 :: IO ()
-part2 = print $ fst $ foldl' nextRowFold (countSafe row, row) [2..400000]
-    where row = readRow input
-
-readRow :: String -> [Bool]
-readRow = map (=='^')
-
-showRow :: [Bool] -> String
-showRow = map (\c -> if c then '^' else '.')
-
-extended :: [Bool] -> [Bool]
-extended row = [False] ++ row ++ [False]
-
-nextRow :: [Bool] -> [Bool]
-nextRow = map (isTrap) . segments . extended
-
-nextRowFold :: (Int, [Bool]) -> Int -> (Int, [Bool])
-nextRowFold (n, row) _ = (n + countSafe newRow, newRow)
-    where newRow = nextRow row
-
-countSafe :: [Bool] -> Int
-countSafe = length . filter (not)
-
-segments :: [a] -> [[a]]
-segments = filter ((==3) . length) . map (take 3) . tails
-
-isTrap :: [Bool] -> Bool
-isTrap segment
-    | segment == [True, True, False] = True
-    | segment == [False, True, True] = True
-    | segment == [True, False, False] = True
-    | segment == [False, False, True] = True
-    | otherwise = False