From: Neil Smith <NeilNjae@users.noreply.github.com>
Date: Sat, 2 Dec 2023 11:10:53 +0000 (+0000)
Subject: Done day 2
X-Git-Url: https://git.njae.me.uk/?a=commitdiff_plain;h=af2928ada523abf40d427402ba93d11b326d013c;p=advent-of-code-23.git

Done day 2
---

diff --git a/advent-of-code23.cabal b/advent-of-code23.cabal
index 916090c..d2f2d16 100644
--- a/advent-of-code23.cabal
+++ b/advent-of-code23.cabal
@@ -100,5 +100,9 @@ library
 executable advent01
   import: common-extensions, build-directives
   main-is: advent01/Main.hs
-  build-depends: split
-  
\ No newline at end of file
+
+executable advent02
+  import: common-extensions, build-directives
+  main-is: advent02/Main.hs
+  build-depends: text, attoparsec
+    
\ No newline at end of file
diff --git a/advent02/Main.hs b/advent02/Main.hs
new file mode 100644
index 0000000..d33a26b
--- /dev/null
+++ b/advent02/Main.hs
@@ -0,0 +1,110 @@
+-- Writeup at https://work.njae.me.uk/2022/12/02/advent-of-code-2022-day-2/
+
+import AoC
+import Data.Text (Text)
+import qualified Data.Text.IO as TIO
+import Data.Attoparsec.Text hiding (Result)
+import Control.Applicative
+
+
+data Game = Game {getID :: Int, getRevelations :: [Revelation]} 
+  deriving (Eq, Show)
+data Revelation = Revelation Int Int Int deriving (Eq, Show)
+
+instance Semigroup Revelation where
+  (Revelation r0 g0 b0) <> (Revelation r1 g1 b1) = 
+    Revelation (max r0 r1) (max g0 g1) (max b0 b1)
+
+instance Monoid Revelation where
+  mempty = Revelation 0 0 0
+
+
+newtype Merging = Merging { getMerging :: Revelation } deriving (Eq, Show)
+
+instance Semigroup Merging where
+  (Merging (Revelation r0 g0 b0)) <> (Merging (Revelation r1 g1 b1)) = 
+    Merging (Revelation (r0 + r1) (g0 + g1) (b0 + b1))
+
+instance Monoid Merging where
+  mempty = Merging (Revelation 0 0 0)
+
+data ParsedGame = ParsedGame Int [Showings] deriving (Eq, Show)
+type Showings = [Cube]
+data Cube = Cube Colour Int deriving (Eq, Show)
+data Colour = Red | Green | Blue deriving (Eq, Show)
+
+main :: IO ()
+main = 
+  do  dataFileName <- getDataFileName
+      text <- TIO.readFile dataFileName
+      let parsedGames = successfulParse text
+      -- print parsedGames
+      let games = fmap engame parsedGames
+      -- print games
+      print $ part1 games
+      print $ part2 games
+
+
+part1, part2 :: [Game] -> Int
+part1 games = sum $ fmap getID $ filter (`possible` limit) games
+  where limit = Revelation 12 13 14
+
+part2 = sum . fmap (power . required)
+
+
+compatibleWith :: Revelation -> Revelation -> Bool
+compatibleWith (Revelation r0 g0 b0) (Revelation r1 g1 b1) = 
+  (r0 <= r1) && (g0 <= g1) && (b0 <= b1)
+
+possible :: Game -> Revelation -> Bool
+possible game limit = 
+  all (`compatibleWith` limit) $ getRevelations game
+
+required :: Game -> Revelation
+required = mconcat . getRevelations
+
+power :: Revelation -> Int
+power (Revelation r g b) = r * g * b
+
+
+-- conversion from parsed to real data
+
+engame :: ParsedGame -> Game
+engame (ParsedGame n showings) = Game n (fmap revealify showings)
+
+revealify :: Showings -> Revelation
+revealify = getMerging . mconcat . (fmap reveal)
+
+reveal :: Cube -> Merging
+reveal (Cube Red   n) = Merging (Revelation n 0 0)
+reveal (Cube Green n) = Merging (Revelation 0 n 0)
+reveal (Cube Blue  n) = Merging (Revelation 0 0 n)
+
+
+-- Parse the input file
+
+gamesP :: Parser [ParsedGame]
+gameP :: Parser ParsedGame
+showingsP :: Parser [Showings]
+showingP :: Parser Showings
+cubeP :: Parser Cube
+colourP, redP, greenP, blueP :: Parser Colour
+
+gamesP = gameP `sepBy` endOfLine
+gameP = ParsedGame <$> (("Game " *> decimal) <* ": ") <*> showingsP
+
+showingsP = showingP `sepBy` "; "
+showingP = cubeP `sepBy` ", "
+cubeP = (flip Cube) <$> (decimal  <* " ") <*> colourP 
+
+colourP = redP <|> greenP <|> blueP
+redP = Red <$ "red"
+greenP = Green <$ "green"
+blueP = Blue <$ "blue"
+
+
+successfulParse :: Text -> [ParsedGame]
+successfulParse input = 
+  case parseOnly gamesP input of
+    Left  _err -> [] -- TIO.putStr $ T.pack $ parseErrorPretty err
+    Right matches -> matches
diff --git a/data/advent02.txt b/data/advent02.txt
new file mode 100644
index 0000000..a7a25fb
--- /dev/null
+++ b/data/advent02.txt
@@ -0,0 +1,100 @@
+Game 1: 7 green, 14 red, 5 blue; 8 red, 4 green; 6 green, 18 red, 9 blue
+Game 2: 3 blue, 15 red, 5 green; 1 blue, 14 red, 5 green; 11 red; 4 green, 1 blue, 3 red; 4 green, 1 blue; 10 red, 1 green
+Game 3: 11 green, 3 red; 4 green, 15 blue; 14 blue, 2 red, 10 green; 1 red, 3 green, 10 blue
+Game 4: 1 green, 6 red, 11 blue; 3 blue, 12 red; 1 green, 14 red, 8 blue; 3 blue, 7 red; 8 blue, 5 red; 7 red, 1 green
+Game 5: 14 green, 3 red, 3 blue; 2 red, 1 green, 1 blue; 8 green, 3 blue, 1 red; 15 green, 8 blue, 1 red
+Game 6: 4 blue, 8 green, 5 red; 9 green, 10 blue, 7 red; 11 blue, 10 red, 7 green; 8 red, 6 blue, 9 green
+Game 7: 5 green, 11 blue, 9 red; 2 green, 6 red, 12 blue; 8 red, 4 blue, 3 green; 7 green, 8 red, 9 blue; 8 green, 5 red
+Game 8: 7 red, 12 green; 9 blue, 15 red, 8 green; 3 blue, 11 green, 6 red; 8 blue, 12 red, 5 green
+Game 9: 8 blue, 6 red, 7 green; 2 blue, 3 red, 10 green; 10 blue, 6 red, 7 green; 11 red, 7 blue, 5 green; 10 red, 11 green
+Game 10: 5 red, 14 green; 2 red, 6 blue, 15 green; 3 red, 4 blue, 7 green; 6 red, 1 green, 4 blue
+Game 11: 4 blue, 11 green, 6 red; 12 red, 1 blue, 5 green; 7 red, 1 blue; 11 red, 2 green, 3 blue; 2 blue, 6 red, 7 green
+Game 12: 1 green, 8 red, 3 blue; 3 green, 2 red; 2 blue, 5 red, 1 green
+Game 13: 2 green; 8 green, 1 blue, 12 red; 1 blue, 14 green, 2 red; 1 blue, 6 red, 6 green; 7 green, 10 red
+Game 14: 9 green, 4 red, 1 blue; 5 red, 2 green; 17 green, 1 red; 6 red, 10 green; 4 green, 3 red, 1 blue
+Game 15: 7 green, 13 blue, 4 red; 1 blue, 7 green, 9 red; 13 blue, 13 red, 7 green; 8 red, 9 blue; 9 red, 14 blue; 2 green, 7 red, 9 blue
+Game 16: 6 green, 18 blue, 6 red; 5 green, 2 blue, 2 red; 6 green, 2 red, 17 blue; 2 red, 2 green, 8 blue; 2 red, 10 blue
+Game 17: 17 red, 8 green; 4 blue, 10 green, 3 red; 8 red, 5 green, 3 blue; 12 green, 3 red
+Game 18: 6 red, 1 green, 14 blue; 1 red, 10 blue, 1 green; 1 red, 17 blue, 1 green; 5 red, 1 blue; 5 red, 18 blue; 2 red, 3 blue
+Game 19: 5 blue, 12 red; 6 blue, 3 red, 6 green; 8 blue, 6 red, 6 green; 8 green, 8 blue, 2 red; 4 green, 6 red, 6 blue; 1 green, 3 red, 13 blue
+Game 20: 7 green, 2 blue; 4 blue, 12 red, 2 green; 7 red, 2 green, 6 blue
+Game 21: 8 green, 1 red; 1 red, 9 green; 1 red, 6 green, 4 blue; 1 red, 3 green, 5 blue; 2 red, 6 green
+Game 22: 11 green, 12 red, 5 blue; 5 blue, 9 red, 11 green; 8 green, 4 red, 5 blue; 7 green, 1 blue, 1 red
+Game 23: 11 blue, 9 red, 5 green; 3 green, 3 blue; 11 blue, 9 red, 1 green; 2 red, 7 green; 4 green, 3 blue, 1 red; 5 green, 4 blue
+Game 24: 1 green, 4 blue, 9 red; 1 green, 2 blue, 11 red; 1 green, 13 red; 1 green, 2 blue, 3 red
+Game 25: 1 red, 7 green, 4 blue; 2 red, 1 green, 3 blue; 10 blue, 1 red; 7 blue, 2 red, 6 green; 7 green, 15 blue, 2 red; 14 green, 13 blue
+Game 26: 5 red, 2 blue; 9 red, 2 green, 12 blue; 15 red, 1 green, 5 blue; 1 green, 16 blue, 17 red
+Game 27: 2 green, 4 red; 4 red, 1 green; 1 blue, 3 red; 2 red
+Game 28: 3 green; 8 green, 9 red; 9 red, 3 blue, 10 green; 16 green, 4 blue, 4 red
+Game 29: 3 green, 1 red, 7 blue; 5 blue, 5 green, 2 red; 5 blue, 6 green, 2 red; 2 green, 2 red, 4 blue; 1 green, 3 red, 8 blue
+Game 30: 7 red, 3 green, 7 blue; 3 green, 10 red; 5 red, 5 blue, 1 green; 9 blue, 2 green, 7 red; 1 red, 10 blue; 10 blue, 2 red, 4 green
+Game 31: 9 green, 1 red; 9 blue, 6 red, 9 green; 17 blue, 4 green, 10 red; 19 blue, 11 green
+Game 32: 1 red, 1 blue, 6 green; 10 blue, 4 green; 1 red, 5 blue; 9 blue, 3 green
+Game 33: 4 red; 3 red; 2 red, 1 green, 1 blue; 1 green; 1 blue, 1 red
+Game 34: 2 green, 9 blue, 1 red; 5 blue, 7 green, 1 red; 2 green, 1 red, 16 blue; 1 blue, 5 green, 6 red
+Game 35: 11 red, 10 blue; 2 blue, 12 green, 12 red; 3 green, 6 red, 6 blue; 14 blue, 10 green, 1 red
+Game 36: 2 blue, 3 red, 15 green; 2 blue, 6 green, 2 red; 14 blue, 4 red, 7 green; 13 blue, 12 green, 2 red
+Game 37: 6 green, 14 blue, 7 red; 7 blue, 2 red, 6 green; 1 blue, 2 green, 6 red
+Game 38: 2 green, 15 red, 2 blue; 14 red, 1 blue; 14 red, 2 green, 12 blue
+Game 39: 5 green, 1 blue, 10 red; 4 red, 3 blue, 7 green; 2 red, 2 green, 4 blue; 10 blue, 5 green
+Game 40: 7 red, 10 green, 2 blue; 7 green, 3 red, 2 blue; 10 red, 9 blue, 7 green; 3 green, 5 blue, 10 red
+Game 41: 5 blue, 2 green, 11 red; 2 green, 18 red, 3 blue; 8 green, 10 red, 1 blue; 16 red, 13 green; 17 green, 2 blue, 17 red; 1 green, 1 blue, 9 red
+Game 42: 5 red, 2 green, 1 blue; 6 red, 2 blue; 3 red, 1 blue; 9 red, 5 blue; 1 green, 8 red, 1 blue
+Game 43: 1 red, 2 green; 12 red, 4 green, 5 blue; 4 blue, 9 red; 4 green, 10 red, 2 blue
+Game 44: 2 blue, 9 green, 3 red; 6 red, 4 blue, 4 green; 3 red, 4 blue; 5 red, 2 green, 1 blue; 4 blue, 1 green; 8 green, 1 red, 4 blue
+Game 45: 7 blue, 1 red; 2 red, 4 green, 9 blue; 3 red, 15 blue; 4 red, 4 green, 12 blue; 1 red, 18 blue
+Game 46: 4 red, 14 blue, 11 green; 5 blue, 6 red, 17 green; 10 red, 8 green, 17 blue; 7 red, 10 blue, 19 green
+Game 47: 7 blue, 3 red; 7 blue, 1 green, 2 red; 2 red, 6 blue; 1 green, 9 blue, 2 red; 3 red; 2 green, 1 blue
+Game 48: 12 red, 6 blue, 6 green; 9 green, 19 red, 1 blue; 2 blue, 12 green, 8 red
+Game 49: 1 green, 11 red, 11 blue; 10 red, 10 blue, 11 green; 4 red, 19 green, 6 blue; 11 blue, 19 green, 13 red; 9 green, 9 blue
+Game 50: 1 blue, 12 green, 4 red; 1 blue, 18 green, 1 red; 1 blue, 12 green, 3 red; 1 blue, 4 green
+Game 51: 10 red, 5 blue, 1 green; 10 red, 4 blue; 6 red, 8 blue
+Game 52: 1 blue; 5 green, 9 red; 2 blue, 1 green, 11 red; 2 blue, 13 red, 5 green; 6 green, 1 blue, 9 red
+Game 53: 8 blue, 15 red; 2 green, 4 red, 12 blue; 6 blue, 1 green, 15 red; 20 red, 12 blue; 6 red, 1 green, 2 blue
+Game 54: 5 red, 16 blue; 5 green, 3 red, 17 blue; 5 red, 3 blue, 5 green; 4 green, 6 blue, 9 red; 2 blue, 6 green, 2 red
+Game 55: 1 blue, 1 red; 1 green, 1 red, 3 blue; 4 blue, 1 green, 1 red; 5 blue; 2 blue
+Game 56: 4 red, 4 blue; 7 blue, 11 red; 1 red, 2 green, 9 blue; 4 blue, 16 red, 2 green; 1 red; 2 green, 5 blue, 1 red
+Game 57: 1 green, 8 blue; 1 red; 10 blue, 5 green; 3 blue, 4 green; 11 blue, 1 red; 4 blue, 3 green, 1 red
+Game 58: 8 green, 5 blue; 9 blue, 8 red, 5 green; 6 red, 6 blue, 9 green; 1 green, 5 blue, 2 red; 3 red, 3 green, 2 blue; 2 green, 1 red, 1 blue
+Game 59: 15 red, 4 blue, 8 green; 12 red, 6 green; 3 red
+Game 60: 14 blue, 11 red; 12 blue, 6 red; 11 blue, 6 red; 5 red, 13 blue; 15 blue; 1 green, 1 blue, 16 red
+Game 61: 5 red, 1 green; 4 red, 9 green; 1 blue, 6 green, 14 red
+Game 62: 19 red, 1 green; 1 blue, 3 red; 15 red, 1 blue; 1 blue, 3 red; 5 red, 1 green, 1 blue
+Game 63: 1 red, 3 green, 10 blue; 2 green, 1 red, 14 blue; 1 green, 5 blue, 1 red; 6 blue, 4 green, 1 red
+Game 64: 5 red, 2 green; 5 green, 2 red, 2 blue; 3 red, 3 blue, 1 green; 3 blue, 3 green, 3 red; 1 green, 3 red
+Game 65: 13 red, 2 green, 3 blue; 1 red, 2 blue, 1 green; 1 blue; 2 green, 1 red
+Game 66: 7 red, 12 blue, 6 green; 2 red, 5 green, 11 blue; 3 green, 2 blue, 2 red; 9 blue, 1 red, 2 green
+Game 67: 4 red, 3 green, 7 blue; 8 blue, 3 red; 2 red; 9 blue, 5 red, 2 green
+Game 68: 12 blue; 10 green, 5 blue; 8 blue; 9 blue, 7 red, 18 green; 5 red, 12 blue, 8 green; 8 green, 13 red, 10 blue
+Game 69: 1 green, 1 red; 2 red, 1 green, 3 blue; 1 red, 1 green, 4 blue; 1 green, 8 red
+Game 70: 12 green, 1 blue, 4 red; 8 green, 1 red; 1 blue, 8 green; 2 green, 3 red; 5 green, 4 red; 2 blue, 12 green, 1 red
+Game 71: 10 blue, 4 red, 14 green; 6 green, 7 red, 8 blue; 1 red, 1 blue, 13 green; 10 red, 6 blue, 3 green; 8 blue, 7 green, 4 red
+Game 72: 1 green; 1 blue, 12 green, 14 red; 3 blue, 7 green, 8 red; 12 red, 18 green; 13 green, 11 red, 1 blue; 2 blue, 6 green, 6 red
+Game 73: 17 red, 3 green, 15 blue; 15 blue, 2 red; 15 red, 7 blue, 4 green; 9 blue, 1 green, 18 red
+Game 74: 10 red, 2 blue; 1 blue, 7 red; 5 blue, 2 green, 2 red; 3 blue, 15 red, 3 green; 4 blue, 3 green, 13 red
+Game 75: 6 blue, 10 red; 2 green, 2 blue, 10 red; 10 green, 1 blue, 10 red; 4 blue, 6 red, 11 green
+Game 76: 10 blue, 1 red, 2 green; 6 blue, 2 green, 10 red; 3 red, 15 green, 1 blue
+Game 77: 5 green, 1 red; 2 blue, 1 green; 13 green, 2 red, 5 blue; 12 green, 1 blue, 2 red; 3 blue, 2 green, 2 red
+Game 78: 1 green, 16 red; 6 red, 1 blue, 1 green; 13 red; 12 red, 3 green; 1 blue, 7 red
+Game 79: 3 green, 7 blue; 1 red, 8 blue, 5 green; 1 red, 6 green, 7 blue; 11 green, 1 red, 7 blue; 1 blue
+Game 80: 3 green, 13 red, 8 blue; 17 red, 9 blue; 7 blue, 1 green, 2 red; 8 red, 6 blue, 3 green; 1 red, 2 blue; 2 green, 4 blue, 10 red
+Game 81: 3 red, 1 green, 7 blue; 2 green, 2 blue, 3 red; 3 red, 1 blue, 7 green; 6 green, 12 blue
+Game 82: 11 red, 3 green, 2 blue; 3 red, 1 green, 1 blue; 16 red, 1 green
+Game 83: 8 green, 3 blue, 2 red; 1 blue, 13 green, 6 red; 4 blue, 5 red, 1 green; 12 green, 4 red, 12 blue; 17 green, 7 blue, 3 red
+Game 84: 2 blue, 13 red, 5 green; 3 green, 3 blue, 19 red; 2 red, 11 green, 5 blue; 3 green, 3 blue, 15 red; 7 green, 4 blue, 11 red; 1 red, 10 green
+Game 85: 1 red, 3 blue, 4 green; 2 red, 11 green, 2 blue; 2 blue, 7 green, 1 red
+Game 86: 3 blue, 4 green, 8 red; 4 green, 2 red; 9 red, 4 blue, 1 green; 18 red, 1 blue
+Game 87: 3 red, 14 blue, 1 green; 10 blue, 1 green; 1 green, 4 red, 14 blue; 8 blue, 7 green, 4 red; 2 green, 7 red, 7 blue; 2 green, 10 blue
+Game 88: 12 green, 6 red; 6 red, 3 blue, 2 green; 4 red, 4 blue, 9 green; 3 red, 4 green, 8 blue; 1 blue, 3 red
+Game 89: 3 green, 3 red, 2 blue; 3 red, 2 green, 1 blue; 6 green, 4 blue, 12 red; 13 red, 14 blue, 1 green; 5 red; 10 red, 8 blue, 7 green
+Game 90: 7 green, 10 blue; 6 green, 1 red, 2 blue; 6 blue; 5 green, 9 blue, 1 red; 10 blue, 1 red, 6 green
+Game 91: 6 red, 2 blue; 3 blue, 3 red, 1 green; 19 blue, 7 red
+Game 92: 9 green, 3 blue; 1 red, 5 green; 13 green, 3 blue, 2 red; 1 red, 3 blue, 7 green
+Game 93: 11 red, 3 green, 11 blue; 7 green, 3 red, 10 blue; 11 green, 4 blue, 8 red; 14 green, 8 blue
+Game 94: 7 blue; 1 green, 11 blue, 2 red; 1 green, 1 red, 19 blue; 7 green, 2 red, 10 blue
+Game 95: 15 blue, 1 red, 9 green; 5 green, 1 red, 4 blue; 6 green, 17 blue; 9 blue, 11 green; 10 blue, 9 green; 9 blue, 7 green
+Game 96: 7 red, 13 blue; 6 blue, 15 red, 3 green; 1 green, 1 red, 1 blue; 9 red, 2 green, 8 blue; 5 green, 8 red, 1 blue; 6 blue, 3 green, 13 red
+Game 97: 19 blue, 10 red, 4 green; 8 red, 17 blue; 8 blue
+Game 98: 2 blue, 2 red, 4 green; 5 green, 3 blue, 2 red; 5 green, 15 blue; 15 blue, 5 green, 1 red
+Game 99: 1 blue, 2 green, 8 red; 1 blue, 7 red, 1 green; 11 red, 2 green; 1 red, 1 blue
+Game 100: 8 green; 2 red, 20 green; 12 green, 1 red, 1 blue; 4 red, 1 blue; 1 blue, 6 red
\ No newline at end of file
diff --git a/data/advent02a.txt b/data/advent02a.txt
new file mode 100644
index 0000000..295c36d
--- /dev/null
+++ b/data/advent02a.txt
@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
diff --git a/problems/day02.html b/problems/day02.html
new file mode 100644
index 0000000..7f5e6a6
--- /dev/null
+++ b/problems/day02.html
@@ -0,0 +1,154 @@
+<!DOCTYPE html>
+<html lang="en-us">
+<head>
+<meta charset="utf-8"/>
+<title>Day 2 - Advent of Code 2023</title>
+<link rel="stylesheet" type="text/css" href="/static/style.css?31"/>
+<link rel="stylesheet alternate" type="text/css" href="/static/highcontrast.css?1" title="High Contrast"/>
+<link rel="shortcut icon" href="/favicon.png"/>
+<script>window.addEventListener('click', function(e,s,r){if(e.target.nodeName==='CODE'&&e.detail===3){s=window.getSelection();s.removeAllRanges();r=document.createRange();r.selectNodeContents(e.target);s.addRange(r);}});</script>
+</head><!--
+
+
+
+
+Oh, hello!  Funny seeing you here.
+
+I appreciate your enthusiasm, but you aren't going to find much down here.
+There certainly aren't clues to any of the puzzles.  The best surprises don't
+even appear in the source until you unlock them for real.
+
+Please be careful with automated requests; I'm not a massive company, and I can
+only take so much traffic.  Please be considerate so that everyone gets to play.
+
+If you're curious about how Advent of Code works, it's running on some custom
+Perl code. Other than a few integrations (auth, analytics, social media), I
+built the whole thing myself, including the design, animations, prose, and all
+of the puzzles.
+
+The puzzles are most of the work; preparing a new calendar and a new set of
+puzzles each year takes all of my free time for 4-5 months. A lot of effort
+went into building this thing - I hope you're enjoying playing it as much as I
+enjoyed making it for you!
+
+If you'd like to hang out, I'm @ericwastl@hachyderm.io on Mastodon and
+@ericwastl on Twitter.
+
+- Eric Wastl
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+-->
+<body>
+<header><div><h1 class="title-global"><a href="/">Advent of Code</a></h1><nav><ul><li><a href="/2023/about">[About]</a></li><li><a href="/2023/events">[Events]</a></li><li><a href="https://teespring.com/stores/advent-of-code" target="_blank">[Shop]</a></li><li><a href="/2023/settings">[Settings]</a></li><li><a href="/2023/auth/logout">[Log Out]</a></li></ul></nav><div class="user">Neil Smith <a href="/2023/support" class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a> <span class="star-count">4*</span></div></div><div><h1 class="title-event">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="title-event-wrap"></span><a href="/2023">2023</a><span class="title-event-wrap"></span></h1><nav><ul><li><a href="/2023">[Calendar]</a></li><li><a href="/2023/support">[AoC++]</a></li><li><a href="/2023/sponsors">[Sponsors]</a></li><li><a href="/2023/leaderboard">[Leaderboard]</a></li><li><a href="/2023/stats">[Stats]</a></li></ul></nav></div></header>
+
+<div id="sidebar">
+<div id="sponsor"><div class="quiet">Our <a href="/2023/sponsors">sponsors</a> help make Advent of Code possible:</div><div class="sponsor"><a href="https://www.catawiki.com/en/p/917-catawiki-advent-of-code-2023-raffle" target="_blank" onclick="if(ga)ga('send','event','sponsor','sidebar',this.href);" rel="noopener">Catawiki</a> - Turn your passion into your career. Join us! bit.ly/join-cw</div></div>
+</div><!--/sidebar-->
+
+<main>
+<article class="day-desc"><h2>--- Day 2: Cube Conundrum ---</h2><p>You're launched high into the atmosphere! The apex of your trajectory just barely reaches the surface of a large island floating in the sky. You gently land in a fluffy pile of leaves. It's quite cold, but you don't see much snow. An Elf runs over to greet you.</p>
+<p>The Elf explains that you've arrived at <em>Snow Island</em> and apologizes for the lack of snow. He'll be happy to explain the situation, but it's a bit of a walk, so you have some time. They don't get many visitors up here; <span title="No, the Elf's name is not 'WOPR'. It's Joshua.">would you like to play a game</span> in the meantime?</p>
+<p>As you walk, the Elf shows you a small bag and some cubes which are either red, green, or blue. Each time you play this game, he will hide a secret number of cubes of each color in the bag, and your goal is to figure out information about the number of cubes.</p>
+<p>To get information, once a bag has been loaded with cubes, the Elf will reach into the bag, grab a handful of random cubes, show them to you, and then put them back in the bag. He'll do this a few times per game.</p>
+<p>You play several games and record the information from each game (your puzzle input). Each game is listed with its ID number (like the <code>11</code> in <code>Game 11: ...</code>) followed by a semicolon-separated list of subsets of cubes that were revealed from the bag (like <code>3 red, 5 green, 4 blue</code>).</p>
+<p>For example, the record of a few games might look like this:</p>
+<pre><code>Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
+</code></pre>
+<p>In game 1, three sets of cubes are revealed from the bag (and then put back again). The first set is 3 blue cubes and 4 red cubes; the second set is 1 red cube, 2 green cubes, and 6 blue cubes; the third set is only 2 green cubes.</p>
+<p>The Elf would first like to know which games would have been possible if the bag contained <em>only 12 red cubes, 13 green cubes, and 14 blue cubes</em>?</p>
+<p>In the example above, games 1, 2, and 5 would have been <em>possible</em> if the bag had been loaded with that configuration. However, game 3 would have been <em>impossible</em> because at one point the Elf showed you 20 red cubes at once; similarly, game 4 would also have been <em>impossible</em> because the Elf showed you 15 blue cubes at once. If you add up the IDs of the games that would have been possible, you get <code><em>8</em></code>.</p>
+<p>Determine which games would have been possible if the bag had been loaded with only 12 red cubes, 13 green cubes, and 14 blue cubes. <em>What is the sum of the IDs of those games?</em></p>
+</article>
+<p>Your puzzle answer was <code>2101</code>.</p><article class="day-desc"><h2 id="part2">--- Part Two ---</h2><p>The Elf says they've stopped producing snow because they aren't getting any <em>water</em>! He isn't sure why the water stopped; however, he can show you how to get to the water source to check it out for yourself. It's just up ahead!</p>
+<p>As you continue your walk, the Elf poses a second question: in each game you played, what is the <em>fewest number of cubes of each color</em> that could have been in the bag to make the game possible?</p>
+<p>Again consider the example games from earlier:</p>
+<pre><code>Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
+</code></pre>
+<ul>
+<li>In game 1, the game could have been played with as few as 4 red, 2 green, and 6 blue cubes. If any color had even one fewer cube, the game would have been impossible.</li>
+<li>Game 2 could have been played with a minimum of 1 red, 3 green, and 4 blue cubes.<li>
+<li>Game 3 must have been played with at least 20 red, 13 green, and 6 blue cubes.</li>
+<li>Game 4 required at least 14 red, 3 green, and 15 blue cubes.</li>
+<li>Game 5 needed no fewer than 6 red, 3 green, and 2 blue cubes in the bag.</li>
+</ul>
+<p>The <em>power</em> of a set of cubes is equal to the numbers of red, green, and blue cubes multiplied together. The power of the minimum set of cubes in game 1 is <code>48</code>. In games 2-5 it was <code>12</code>, <code>1560</code>, <code>630</code>, and <code>36</code>, respectively. Adding up these five powers produces the sum <code><em>2286</em></code>.</p>
+<p>For each game, find the minimum set of cubes that must have been present. <em>What is the sum of the power of these sets?</em></p>
+</article>
+<p>Your puzzle answer was <code>58269</code>.</p><p class="day-success">Both parts of this puzzle are complete! They provide two gold stars: **</p>
+<p>At this point, you should <a href="/2023">return to your Advent calendar</a> and try another puzzle.</p>
+<p>If you still want to see it, you can <a href="2/input" target="_blank">get your puzzle input</a>.</p>
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+></span>]</span> this puzzle.</p>
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