initial + day01

.gitignore

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+.stack-work/
+*~

AOC22.cabal

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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.2.
+--
+-- see: https://github.com/sol/hpack
+
+name:           AOC22
+version:        0.1.0.0
+description:    Please see the README on GitHub at <https://github.com/githubuser/AOC22#readme>
+homepage:       https://github.com/githubuser/AOC22#readme
+bug-reports:    https://github.com/githubuser/AOC22/issues
+author:         Author name here
+maintainer:     example@example.com
+copyright:      2022 Author name here
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    CHANGELOG.md
+
+source-repository head
+  type: git
+  location: https://github.com/githubuser/AOC22
+
+executable AOC22-exe
+  main-is: Main.hs
+  other-modules:
+      AOCUtil
+      Days.Day01
+      Paths_AOC22
+  hs-source-dirs:
+      src
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      AOC22
+    , base >=4.7 && <5
+  default-language: Haskell2010

LICENSE

@@ -0,0 +1,30 @@
+Copyright Author name here (c) 2022
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# AOC22

package.yaml

@@ -0,0 +1,59 @@
+name:                AOC22
+version:             0.1.0.0
+github:              "githubuser/AOC22"
+license:             BSD3
+author:              "Author name here"
+maintainer:          "example@example.com"
+copyright:           "2022 Author name here"
+
+extra-source-files:
+- README.md
+- CHANGELOG.md
+
+# Metadata used when publishing your package
+# synopsis:            Short description of your package
+# category:            Web
+
+# To avoid duplicated efforts in documentation and dealing with the
+# complications of embedding Haddock markup inside cabal files, it is
+# common to point users to the README.md file.
+description:         Please see the README on GitHub at <https://github.com/githubuser/AOC22#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+
+ghc-options:
+- -Wall
+- -Wcompat
+- -Widentities
+- -Wincomplete-record-updates
+- -Wincomplete-uni-patterns
+- -Wmissing-export-lists
+- -Wmissing-home-modules
+- -Wpartial-fields
+- -Wredundant-constraints
+
+# library:
+  # source-dirs: src
+
+executables:
+  AOC22-exe:
+    main:                Main.hs
+    source-dirs:         src
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - AOC22
+
+# tests:
+#   AOC22-test:
+#     main:                Spec.hs
+#     source-dirs:         test
+#     ghc-options:
+#     - -threaded
+#     - -rtsopts
+#     - -with-rtsopts=-N
+#     dependencies:
+#     - AOC22

src/AOCUtil.hs

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+module AOCUtil where
+import           Data.List
+import           Data.Ord
+
+interactF :: String -> (String -> String) -> IO ()
+interactF file fun = (putStrLn . fun) =<< readFile file
+
+
+splitOn :: Eq a => a -> [a] -> [[a]]
+splitOn p s = case dropWhile (p ==) s of
+  [] -> []
+  s' -> w : splitOn p s'' where (w, s'') = break (== p) s'
+
+
+impl :: Bool -> Bool -> Bool
+impl a b = not a || b
+
+unDigits :: [Int] -> Int
+unDigits []  = 0
+unDigits [i] = i
+unDigits is  = unDigits (init is) * 10 + last is
+
+middle :: [a] -> a
+middle [] = error "called AOCUtil.middle on empty list."
+middle ls = ls !! (length ls `div` 2)
+
+
+-- mapFst :: (a->c) -> (a,b) -> (c,b)
+-- mapFst f (a, b) = (f a, b)
+
+-- mapSnd :: (b->c) -> (a,b) -> (a,c)
+-- mapSnd f (a, b) = (a, f b)
+
+
+readBin :: String -> Int
+readBin [] = 0
+readBin ls = readBin (init ls) * 2 + toBin (last ls)
+ where
+  toBin '0' = 0
+  toBin '1' = 1
+
+
+first2 :: [a] -> (a, a)
+first2 (a : b : _) = (a, b)
+
+first3 :: [a] -> (a, a, a)
+first3 (a : b : c : _) = (a, b, c)
+
+asList2 :: (a, a) -> [a]
+asList2 (a, b) = [a, b]
+
+asList3 :: (a, a, a) -> [a]
+asList3 (a, b, c) = [a, b, c]
+
+in2 :: Eq a => a -> (a, a) -> Bool
+in2 a = (a `elem`) . asList2
+
+in3 :: Eq a => a -> (a, a, a) -> Bool
+in3 a = (a `elem`) . asList3
+
+mapT :: (a -> b) -> (a, a) -> (b, b)
+mapT f (a1, a2) = (f a1, f a2)
+
+mapT3 :: (a -> b) -> (a, a, a) -> (b, b, b)
+mapT3 f (a1, a2, a3) = (f a1, f a2, f a3)
+
+applyT :: (a -> b, a -> c) -> a -> (b, c)
+applyT (f1, f2) a = (f1 a, f2 a)
+
+
+mostCommon :: Ord a => [a] -> a
+mostCommon = head . head . sortOn (Down . length) . group . sort
+
+without :: Int -> [a] -> [a]
+without _ []       = []
+without 0 (a : as) = as
+without i (a : as) = a : without (i - 1) as
+
+clamp :: Ord a => (a, a) -> a -> a
+clamp (l, u) v = min u $ max l v
+
+
+rotateR :: Int -> [a] -> [a]
+rotateR 0 ls = ls
+rotateR i ls | i < 0     = rotateL (-i) ls
+             | otherwise = rotateR (i - 1) (last ls : init ls)
+
+rotateL :: Int -> [a] -> [a]
+rotateL 0 ls = ls
+rotateL i ls | i < 0     = rotateR (-i) ls
+             | otherwise = rotateL (i - 1) (tail ls ++ [head ls])

src/Days/Day01.hs

@@ -0,0 +1,15 @@
+module Days.Day01 where
+import AOCUtil
+import Data.List
+
+runA :: IO()
+runA = interactF "data/day01.txt" (show. solve . lines) 
+
+runB :: IO()
+runB = interactF "data/day01.txt" (show. solveB . lines)
+
+solve :: [String]-> Int 
+solve = maximum .  map (sum . (map read)) . splitOn "" 
+
+solveB :: [String] -> Int
+solveB = sum . take 3 .reverse. sort .  map (sum . (map read)) . splitOn "" 

src/Main.hs

@@ -0,0 +1,8 @@
+module Main where
+
+import Days.Day01
+
+main :: IO ()
+main = Days.Day01.runA
+
+

stack.yaml

@@ -0,0 +1,66 @@
+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver: lts-20.2
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+# extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=2.3"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

stack.yaml.lock

@@ -0,0 +1,12 @@
+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    size: 648432
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/2.yaml
+    sha256: fc39d8afc97531d53d87b10abdef593bce503c0c1e46c2e9a84ebcbc78bf8470
+  original: lts-20.2