setup and day 1 part 1

Author: PFCM

.gitignore

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+inputs/
+
 dist
 dist-*
 cabal-dev

README.md

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+# adventofcode2017
+it's a thing

Setup.hs

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+import Distribution.Simple
+main = defaultMain

adventofcode2017.cabal

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+name:                adventofcode2017
+version:             0.1.0.0
+synopsis:            Short description of your package
+homepage:            https://github.com/pfcm/adventofcode2017#readme
+license:             BSD3
+author:              pfcm
+maintainer:          pfcmathews@gmail.com
+copyright:           2017 pfcm
+category:            ???
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+
+-- 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/adventofcode2017#readme>
+
+library
+  hs-source-dirs:      days
+  build-depends:       base >= 4.7 && < 5
+  default-language:    Haskell2010
+
+executable first
+  hs-source-dirs:      days
+  main-is:             First.hs
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  build-depends:       base
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/githubuser/adventofcode2017

days/First.hs

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+import Data.Char
+
+
+circularSqueeze :: Eq a => [a] -> [a]
+circularSqueeze [] = []
+circularSqueeze [x] = []
+circularSqueeze list =
+  let
+    front = head list
+    squeeze (x:y:xs)
+      | x == y = x : squeeze (y:xs)
+      | otherwise = squeeze $ y:xs
+    squeeze [x] = [x | x == front]
+    squeeze _ = []
+    in squeeze list
+
+
+solveCaptcha :: [Int] -> Int
+solveCaptcha = sum . circularSqueeze
+
+
+main = do
+  inputs <- getLine
+  print . solveCaptcha . map digitToInt $ inputs

stack.yaml

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+# 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
+# resolver: ghcjs-0.1.0_ghc-7.10.2
+# resolver:
+#  name: custom-snapshot
+#  location: "./custom-snapshot.yaml"
+resolver: lts-9.14
+
+# 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
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#   extra-dep: true
+#  subdirs:
+#  - auto-update
+#  - wai
+#
+# A package marked 'extra-dep: true' will only be built if demanded by a
+# non-dependency (i.e. a user package), and its test suites and benchmarks
+# will not be run. This is useful for tweaking upstream packages.
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver
+# (e.g., acme-missiles-0.3)
+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: ">=1.5"
+#
+# 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