diff options
Diffstat (limited to '2019')
| -rw-r--r-- | 2019/13.hs | 83 | ||||
| -rw-r--r-- | 2019/13.in | 1 |
2 files changed, 84 insertions, 0 deletions
diff --git a/2019/13.hs b/2019/13.hs new file mode 100644 index 0000000..29fb9b9 --- /dev/null +++ b/2019/13.hs @@ -0,0 +1,83 @@ +{-# LANGUAGE MultiWayIf #-} +module Main where + +import Data.List +import qualified Data.Map.Strict as Map +import Data.Maybe + +import Input +import IntCode + + +blockBy :: Show a => Int -> [a] -> [[a]] +blockBy _ [] = [] +blockBy n l = case splitAt n l of + (pre, post@(_:_)) -> pre : blockBy n post + (pre, []) -> [pre] + +printMap :: (Integral i, Integral j) => Map.Map (i, i) j -> [String] +printMap mp = + let keys = Map.keys mp + (minx, maxx) = (minimum (map fst keys), maximum (map fst keys)) + (miny, maxy) = (minimum (map snd keys), maximum (map snd keys)) + in [[".#+=O" !! (fromIntegral (fromMaybe 0 (Map.lookup (x, y) mp))) + | x <- [minx..maxx]] + | y <- [miny..maxy]] + +type Pos = (Int, Int) +data AI = + AI { aiBall :: [Pos] + , aiPad :: [Int] + , aiScreen :: Map.Map Pos Int + , aiScore :: Integer } + +pos :: Integral i => (i, i) -> Pos +pos (a, b) = (fromIntegral a, fromIntegral b) + +initAI :: AI +initAI = AI [] [] Map.empty (-1) + +processOutput :: (Integer, Integer, Integer) -> AI -> AI +processOutput (-1, 0, score) ai = ai { aiScore = score } +processOutput (x, y, v) ai = + let p = pos (x, y) + removed = fromMaybe 0 (Map.lookup p (aiScreen ai)) + screen' = Map.insert (pos (x, y)) (fromIntegral v) (aiScreen ai) + ball' = if removed == 4 then aiBall ai \\ [p] else aiBall ai + ball'' = if v == 4 then p : ball' else ball' + pad' = if removed == 3 then aiPad ai \\ [fromIntegral x] else aiPad ai + pad'' = if v == 3 then fromIntegral x : pad' else pad' + in ai { aiScreen = screen', aiBall = ball'', aiPad = pad'' } + +provideInput :: AI -> Integer +provideInput ai = + case (aiBall ai, aiPad ai) of + ([(x, _)], [pad]) -> if | x < pad -> -1 + | x > pad -> 1 + | otherwise -> 0 + _ -> error "Ambiguous pad/ball!" + +main :: IO () +main = do + program <- parse . head <$> getInput 13 + + print $ let output = snd (run program []) + bd = foldl (\mp [x,y,t] -> Map.insert (x, y) t mp) + Map.empty (blockBy 3 output) + in length (filter (== 2) (Map.elems bd)) + + let program' = 2 : tail program + loop ai mcont output = do + let ai1 = foldl' (\ai' [a,b,c] -> processOutput (a, b, c) ai') ai (blockBy 3 output) + putStr "\x1B[H\x1B[2J" + putStr (unlines (printMap (aiScreen ai1))) + case mcont of + Just cont -> case runContinue cont [provideInput ai1] of + Left (cont', out) -> loop ai1 (Just cont') out + Right (_, out) -> loop ai1 Nothing out + Nothing -> return (aiScore ai1) + + score <- case runInterruptible program' [] of + Left (cont, output) -> loop initAI (Just cont) output + Right (_, output) -> loop initAI Nothing output + print score 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