Done part 1

[advent-of-code-19.git] / advent24 / src / advent24.hs

diff --git a/advent24/src/advent24.hs b/advent24/src/advent24.hs
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+-- import Debug.Trace
+
+
+import Data.Finite (Finite, modulo, getFinite)
+import GHC.TypeNats (KnownNat)
+
+
+-- import Data.Functor.Compose (Compose(..))
+import Data.Matrix (Matrix, matrix, safeGet, (!), prettyMatrix, mapPos, fromList, toList)
+import Data.Bool (bool)
+import Data.Distributive (Distributive(..))
+import Data.Functor.Rep (Representable(..), distributeRep)
+import Data.Functor.Identity (Identity(..))
+import Control.Comonad.Representable.Store (Store(..), StoreT(..), store, experiment, runStore)
+import Control.Comonad (Comonad(..))
+
+import Data.Maybe
+import Data.List
+import qualified Data.Set as S
+
+import Control.Concurrent (threadDelay)
+import Control.Monad (forM_)
+
+
+instance Ord Grid where
+    m1 `compare` m2 = (toList m1) `compare` (toList m2)
+
+
+type Coord = (Int, Int)
+type Grid = Matrix Bool
+type StoredGrid = Store Matrix Bool
+type Rule = StoredGrid -> Bool
+
+type GridCache = S.Set Grid
+
+-- mGet :: Coord -> Matrix a -> a
+-- mGet (r, c) mtx = fromMaybe False $ safeGet r c mtx
+-- mGet rc mtx = mtx ! rc
+
+
+validCoord :: Coord -> Bool
+validCoord (r, c) = r >= 1 && r <= gridSize && c >= 1 && c <= gridSize
+
+
+instance Distributive Matrix where
+  distribute = distributeRep
+
+instance Representable Matrix where
+  type Rep Matrix = Coord
+  index m c = m ! c -- mGet c m
+  tabulate = matrix gridSize gridSize
+
+gridSize :: Int
+gridSize = 5
+
+
+neighbourCoords :: [Coord]
+-- neighbourCoords = [(x, y) | x <- [-1, 0, 1], y <- [-1, 0, 1], (x, y) /= (0, 0)]
+neighbourCoords = [(-1, 0), (1, 0), (0, -1), (0, 1)]
+
+addCoords :: Coord -> Coord -> Coord
+addCoords (x, y) (x', y') = (x + x', y + y')
+
+basicRule :: Rule
+basicRule g = (alive && numNeighboursAlive == 1) || ((not alive) && (numNeighboursAlive == 1 || numNeighboursAlive == 2))
+  where
+    alive = extract g
+    neighbours = experiment ((filter validCoord) . (at neighbourCoords)) g
+    numNeighboursAlive = length (filter id neighbours)
+
+step :: Rule -> StoredGrid -> StoredGrid
+step = extend
+
+render :: StoredGrid -> String
+-- render (StoreT (Identity g) _) = foldMap ((++ "\n") . foldMap (bool "." "#")) g
+render grid = prettyMatrix $ mapPos (\_ c -> bool "." "#" c) g
+    where g = unGrid grid
+
+
+mkGrid :: [Coord] -> StoredGrid
+mkGrid xs = store (`elem` xs) (1, 1)
+
+unGrid :: StoredGrid -> Grid
+-- unGrid (StoreT (Identity g) _) = g
+unGrid grid = fromList gridSize gridSize gridList
+    where (sgf, _sgl) = runStore grid
+          gridList = [sgf (r, c) | r <- [1..gridSize], c <- [1..gridSize]]
+
+
+at :: [Coord] -> Coord -> [Coord]
+coords `at` origin = map (addCoords origin) coords
+
+-- glider, blinker, beacon :: [Coord]
+-- glider = [(1, 0), (2, 1), (0, 2), (1, 2), (2, 2)]
+-- blinker = [(0, 0), (1, 0), (2, 0)]
+-- beacon = [(0, 0), (1, 0), (0, 1), (3, 2), (2, 3), (3, 3)]
+
+
+tickTime :: Int
+tickTime = 200000
+
+start :: IO StoredGrid
+start = do coords <- readGrid
+           return $ mkGrid coords
+  --    glider `at` (1, 1)
+  -- ++ beacon `at` (15, 5)
+
+main :: IO ()
+main = 
+    do sG <- start
+       print $ part1 sG
+       -- let grids = map unGrid $ iterate (step basicRule) sG
+       -- forM_ (take 5 $ iterate (step basicRule) sG) $ \grid -> do
+       --      -- putStr "\ESC[2J" -- Clear terminal screen
+       --      putStrLn (render grid)
+       --      -- threadDelay tickTime
+
+
+readGrid = 
+    do  gs <- readFile "data/advent24.txt"
+        let grid = lines gs
+        let isBug r c = (grid!!r)!!c == '#'
+        let ng = gridSize - 1
+        return [(r + 1, c + 1) | r <- [0..ng], c <- [0..ng], isBug r c]
+
+
+-- part1 :: Grid -> [Grid]
+part1 :: StoredGrid -> Integer
+-- part1 startingGrid = map fst $ takeWhile (uncurry . S.notMember) (zip grids gridCache)
+-- part1 startingGrid = map fst $ takeWhile (\(g, c) -> S.notMember g c) (zip grids gridCache)
+-- part1 startingGrid = fst $ head $ dropWhile (\(g, c) -> S.notMember g c) (zip grids gridCache)
+part1 startingGrid = bioDiversity firstRepeat
+    where 
+          -- grids = map unGrid $ iterate (step basicRule) startingGrid
+          -- gridCache = scanl' (flip . S.insert) S.empty grids
+          grids = fGrids startingGrid
+          gridCache = fGridCache grids
+          firstRepeat = fst $ head $ dropWhile (uncurry S.notMember) (zip grids gridCache)
+
+fGrids :: StoredGrid -> [Grid]
+fGrids stG = map unGrid $ iterate (step basicRule) stG
+
+fGridCache :: [Grid] -> [S.Set Grid]
+fGridCache gs = scanl' (flip S.insert) S.empty gs
+-- fGridCache gs = scanl' (\s g -> S.insert g s) S.empty gs
+
+
+bioDiversity :: Grid -> Integer
+bioDiversity g = sum $ map snd $ filter (id . fst) $ zip bugs $ iterate ( * 2) 1
+    where bugs = toList g