gistfile1.txt

module Main where

import Data.Either
import Text.Parsec
import Text.Parsec.String
import Control.Applicative hiding (many)

data Node = Node {
  nCoords :: (Int, Int),
  nSize :: Int,
  nUsed :: Int,
  nAvail :: Int,
  nUse :: Int
} deriving (Eq, Read, Show)

main :: IO ()
main = do
  inp <- readFile "input22.txt"
  let l = drop 2 $ lines inp
  let res = fmap (parse parseLine "") l
  putStrLn . show $ part1 (rights res)
  --mapM_ (putStrLn . show) res

parseLine :: Parser Node
parseLine = do
  string "/dev/grid/node-x"
  xcoord <- integer <* string "-y"
  ycoord <- integer <* spaces
  size <- parseSizeWithChar 'T' <* spaces
  used <- parseSizeWithChar 'T' <* spaces
  avail <- parseSizeWithChar 'T' <* spaces
  use <- parseSizeWithChar '%'
  return (Node (xcoord, ycoord) size used avail use)


integer = read <$> many1 digit

parseSizeWithChar :: Char -> Parser Int
parseSizeWithChar c = integer <* char c

part1 :: [Node] -> Int
part1 ns = length $ [(a,b) | a <- ns, b <- ns, a /= b, nUsed a /= 0, nUsed a <= nAvail b]