day02

AOC22.cabal

@@ -1,6 +1,6 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.34.2.
+-- This file has been generated from package.yaml by hpack version 0.35.0.
 --
 -- see: https://github.com/sol/hpack
 
@@ -28,6 +28,7 @@ executable AOC22-exe
   other-modules:
       AOCUtil
       Days.Day01
+      Days.Day02
       Paths_AOC22
   hs-source-dirs:
       src

src/Days/Day02.hs

@@ -0,0 +1,57 @@
+module Days.Day02 where
+
+import AOCUtil
+import Data.List
+
+runA :: IO ()
+runA = interactF "data/day02.txt" (show . solve . lines)
+
+runB :: IO ()
+runB = interactF "data/day02.txt" (show . sum . map (scoreB . words) . lines)
+
+solve :: [String] -> Int
+solve = sum . map (score . words)
+
+score :: [String] -> Int
+score [a, b] = myScore b + winScore a b
+score _ = undefined
+
+-- data Symbol = Rock | Paper | Scissor
+
+-- readSymbol :: String -> Symbol
+-- readSymbol "A" = Rock
+-- readSymbol "X" = Rock
+-- readSymbol "B" = Paper
+-- readSymbol "Y" = Paper
+-- readSymbol "C" = Scissor
+-- readSymbol "Z" = Scissor
+-- readSymbol _ = undefined
+
+scoreB :: [String] -> Int
+scoreB [a, b] = myScore (choose a b) + winScore a (choose a b)
+scoreB _ = undefined
+
+myScore :: String -> Int
+myScore "X" = 1
+myScore "Y" = 2
+myScore "Z" = 3
+
+winScore :: String -> String -> Int
+winScore "A" "Y" = 6
+winScore "B" "Z" = 6
+winScore "C" "X" = 6
+winScore "A" "X" = 3
+winScore "B" "Y" = 3
+winScore "C" "Z" = 3
+winScore _ _ = 0
+
+choose :: String -> String -> String
+choose "A" "X" = "Z"
+choose "A" "Y" = "X"
+choose "A" "Z" = "Y"
+choose "B" "X" = "X"
+choose "B" "Y" = "Y"
+choose "B" "Z" = "Z"
+choose "C" "X" = "Y"
+choose "C" "Y" = "Z"
+choose "C" "Z" = "X"

stack.yaml

@@ -17,7 +17,8 @@
 #
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2018-01-01.yaml
-resolver: lts-20.2
+resolver: 
+  compiler: ghc-9.2.4
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.

stack.yaml.lock

@@ -4,9 +4,4 @@
 #   https://docs.haskellstack.org/en/stable/lock_files
 
 packages: []
-snapshots:
+snapshots: []
-- completed:
-    size: 648432
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/2.yaml
-    sha256: fc39d8afc97531d53d87b10abdef593bce503c0c1e46c2e9a84ebcbc78bf8470
-  original: lts-20.2