AdventOfCode2020.cabal

@@ -17,13 +17,11 @@ maintainer:          gael@depreeuw.dev
 extra-source-files:  CHANGELOG.md, README.md
 
 library
-  exposed-modules:     Day1, Day2
+  exposed-modules:     Day1
   -- other-modules:
   -- other-extensions:
   build-depends:       base ^>=4.13.0.0
                      , containers ^>=0.6.4.1
-                     , text ^>=1.2.4.0
-                     , attoparsec ^>=0.13.2.4
   hs-source-dirs:      src
   default-language:    Haskell2010
 

Main.hs

@@ -1,9 +1,16 @@
 module Main where
 
-import Day1 (day1)
+import qualified Day1 (fixExpenseReport)
-import Day2 (day2)
+
+day1 :: IO ()
+day1 = do
+  r <- readFile "./input/day1"
+  putStr "[Day 1-1] fix: "
+  print . Day1.fixExpenseReport 2020 2 . fmap read . lines $ r
+  putStr "[Day 1-2] fix: "
+  print . Day1.fixExpenseReport 2020 3 . fmap read . lines $ r
+
 
 main :: IO ()
 main = do
   day1
-  day2

src/Day1.hs

@@ -1,4 +1,4 @@
-module Day1 (day1) where
+module Day1 (fixExpenseReport) where
 
 import qualified Data.IntSet as DIS
 import Data.Maybe (mapMaybe)
@@ -7,14 +7,6 @@ type Target = Int
 type Expenses = [Int]
 type Expenses' = DIS.IntSet
 
-day1 :: IO ()
-day1 = do
-  r <- readFile "./input/day1"
-  putStr "[Day 1-1] fix: "
-  print . fixExpenseReport 2020 2 . fmap read . lines $ r
-  putStr "[Day 1-2] fix: "
-  print . fixExpenseReport 2020 3 . fmap read . lines $ r
-
 -- Turn the list into an IntSet. For each element in the set, look up the
 -- number in the set to make it 2020. If found, return the multiplication of
 -- the two numbers.

src/Day2.hs

@@ -1,43 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-
-module Day2 (day2) where
-
-import qualified Data.Text as T
-import qualified Data.Attoparsec.Text as P
-
-type Max = Integer
-type Min = Integer
-type Letter = Char
-
-data Policy = Policy { lBound :: Min
-                     , uBound :: Max
-                     , letter :: Letter
-                     }
-
-parserPolicy :: P.Parser Policy
-parserPolicy = do
-    lB <- P.decimal
-    _ <- P.char '-'
-    uB <- P.decimal
-    _ <- P.char ' '
-    le <- P.letter
-    _ <- P.string ": "
-    return $ Policy lB uB le
-
-validatePolicy :: Policy -> String -> Bool
-validatePolicy p s =
-    let l = toInteger . length $ filter (== letter p) s in
-    l >= lBound p && l <= uBound p
-
-validateLine :: String -> Bool
-validateLine s =
-    case P.parse parserPolicy (T.pack s) of
-        P.Fail {} -> error "day2 - parser error"
-        P.Partial _ -> error "day2 - input error"
-        P.Done i r -> validatePolicy r (T.unpack i)
-
-day2 :: IO ()
-day2 = do
-  r <- readFile "./input/day2"
-  putStr "[Day 1-1] # valid passwords: "
-  print . length . filter (==True) . fmap validateLine . lines $ r