+++ /dev/null
-import Data.List (nub, tails, null)
-import Data.Hash.MD5 (md5s, Str(..))
-
-salt = "yjdafjpo"
--- salt = "abc"
-
-main :: IO ()
-main = do
- part1
- part2
-
-part1 :: IO ()
-part1 = print $ head $ drop 63 $ filter (\i -> possibleKey sq i && confirmKey sq i) [0..]
- where sq = md5sequence
-
-part2 :: IO ()
-part2 = print $ head $ drop 63 $ filter (\i -> possibleKey sq i && confirmKey sq i) [0..]
- where sq = md5sequenceS
-
-md5sequence :: [String]
-md5sequence = [makeMd5 i | i <- [0..]]
- where makeMd5 i = md5s (Str (salt ++ show i))
-
-md5sequenceS :: [String]
-md5sequenceS = [makeMd5 i | i <- [0..]]
- where makeMd5 i = stretch $ md5s (Str (salt ++ show i))
- stretch h0 = foldr (\_ h -> md5s (Str h)) h0 [1..2016]
-
-possibleKey :: [String] -> Int-> Bool
-possibleKey s = not . null . repeats 3 . ((!!) s)
-
-confirmKey :: [String] -> Int -> Bool
-confirmKey s i = any (confirmation) $ take 1000 $ drop (i+1) s
- where c = head $ repeats 3 $ s!!i
- confirmation m = c `elem` (repeats 5 m)
-
-repeats :: Int -> String -> [String]
-repeats n = filter (null . tail) . map (nub) . substrings n
-
-substrings :: Int -> [a] -> [[a]]
-substrings l = filter (\s -> (length s) == l) . map (take l) . tails