Created
January 3, 2020 00:44
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module Main where | |
import System.Environment (getArgs) | |
import System.Random | |
import Data.List | |
scan2020 :: [Int] -> [[Int]] | |
scan2020 [] = [] | |
scan2020 ls@(x:xs) | |
| isPrefixOf the2020 ls = the2020 : (scan2020 $ drop 4 ls) | |
| otherwise = [x] : scan2020 xs | |
where the2020 = [2, 0, 2, 0] | |
hl2020 :: [[Int]] -> [String] | |
hl2020 [] = [] | |
hl2020 (x:xs) | |
| length x == 4 = | |
concat ["\ESC[31m", intercalate " " $ map show x, "\ESC[m"] : hl2020 xs | |
| otherwise = concatMap show x : hl2020 xs | |
main :: IO () | |
main = do | |
a <- fmap (read . head) getArgs | |
s <- getStdGen | |
putStrLn $ intercalate " " $ hl2020 $ take a $ scan2020 $ twoandzero s | |
where | |
twoandzero s = map ((*2) . flip mod 2) (randoms s :: [Int]) |
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