From 44f12be1a7004e39cb6e4064a335bcecf7cc728a Mon Sep 17 00:00:00 2001
From: Neil Smith <neil.git@njae.me.uk>
Date: Mon, 4 Dec 2017 09:47:39 +0000
Subject: [PATCH] Day 4

---
 advent-of-code.cabal        |  17 ++
 data/advent04.txt           | 512 ++++++++++++++++++++++++++++++++++++
 src/advent04/advent04.hs    |  28 ++
 src/advent04/advent04.ipynb | 362 +++++++++++++++++++++++++
 4 files changed, 919 insertions(+)
 create mode 100644 data/advent04.txt
 create mode 100644 src/advent04/advent04.hs
 create mode 100644 src/advent04/advent04.ipynb

diff --git a/advent-of-code.cabal b/advent-of-code.cabal
index 53e492c..f00fc9b 100644
--- a/advent-of-code.cabal
+++ b/advent-of-code.cabal
@@ -39,3 +39,20 @@ executable advent02
   build-depends:       base >= 4.7 && < 5
                      , parsec
                      , parsec-numbers
+
+executable advent03
+  hs-source-dirs:      src/advent03
+  main-is:             advent03.hs
+  default-language:    Haskell2010
+  build-depends:       base >= 4.7 && < 5
+                     , unordered-containers
+                     , mtl
+
+executable advent04
+  hs-source-dirs:      src/advent04
+  main-is:             advent04.hs
+  default-language:    Haskell2010
+  build-depends:       base >= 4.7 && < 5
+                     , containers
+                     , split
+                     
\ No newline at end of file
diff --git a/data/advent04.txt b/data/advent04.txt
new file mode 100644
index 0000000..6d3a137
--- /dev/null
+++ b/data/advent04.txt
@@ -0,0 +1,512 @@
+sayndz zfxlkl attjtww cti sokkmty brx fhh suelqbp
+xmuf znkhaes pggrlp zia znkhaes znkhaes
+nti rxr bogebb zdwrin
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+bssqn wbmdc rigc zketu ketichh enkixg bmdwc stnsdf jnz mqovwg ixgken
+flawt cpott xth ucwgg xce jcubx wvl qsysa nlg
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\ No newline at end of file
diff --git a/src/advent04/advent04.hs b/src/advent04/advent04.hs
new file mode 100644
index 0000000..b8ae85c
--- /dev/null
+++ b/src/advent04/advent04.hs
@@ -0,0 +1,28 @@
+import Data.List (sort)
+import Data.List.Split (splitOn)
+import qualified Data.Map.Strict as M
+
+main :: IO ()
+main = do 
+        text <- readFile "data/advent04.txt"
+        let passphrases = map parseLine $ lines text
+        print $ part1 passphrases
+        print $ part2 passphrases
+
+part1 :: [[String]] -> Int
+part1 = length . filter (not . containsDuplicates) 
+
+part2 :: [[String]] -> Int
+part2 = length . filter (not . containsAnagrams) 
+
+parseLine :: String -> [String]
+parseLine = filter (not . null) . splitOn " "    
+
+frequency :: (Ord a) => [a] -> M.Map a Int 
+frequency xs = M.fromListWith (+) [(x, 1) | x <- xs]
+
+containsDuplicates :: [String] -> Bool
+containsDuplicates = (not . M.null) . M.filter (> 1) . frequency
+
+containsAnagrams :: [String] -> Bool
+containsAnagrams = containsDuplicates . (map sort)
diff --git a/src/advent04/advent04.ipynb b/src/advent04/advent04.ipynb
new file mode 100644
index 0000000..63a54e5
--- /dev/null
+++ b/src/advent04/advent04.ipynb
@@ -0,0 +1,362 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "{-# LANGUAGE NegativeLiterals #-}\n",
+    "{-# LANGUAGE FlexibleContexts #-}"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 57,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import Data.List.Split (splitOn)\n",
+    "import qualified Data.Map.Strict as M\n",
+    "import Data.Map.Strict ((!))\n",
+    "import Data.List (sort)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 62,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "main :: IO ()\n",
+    "main = do \n",
+    "        text <- readFile \"../../data/advent04.txt\"\n",
+    "        let passphrases = map parseLine $ lines text\n",
+    "        print $ take 10 passphrases\n",
+    "        print $ part1 passphrases\n",
+    "        print $ part2 passphrases\n",
+    "--         print $ take 10 passphrases\n",
+    "--         part1 triangles\n",
+    "--         part2 triangles"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "parseLine :: String -> [String]\n",
+    "parseLine = filter (not . null) . splitOn \" \""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "frequency :: (Ord a) => [a] -> M.Map a Int \n",
+    "frequency xs = M.fromListWith (+) [(x, 1) | x <- xs]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 63,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[[\"sayndz\",\"zfxlkl\",\"attjtww\",\"cti\",\"sokkmty\",\"brx\",\"fhh\",\"suelqbp\"],[\"xmuf\",\"znkhaes\",\"pggrlp\",\"zia\",\"znkhaes\",\"znkhaes\"],[\"nti\",\"rxr\",\"bogebb\",\"zdwrin\"],[\"sryookh\",\"unrudn\",\"zrkz\",\"jxhrdo\",\"gctlyz\"],[\"bssqn\",\"wbmdc\",\"rigc\",\"zketu\",\"ketichh\",\"enkixg\",\"bmdwc\",\"stnsdf\",\"jnz\",\"mqovwg\",\"ixgken\"],[\"flawt\",\"cpott\",\"xth\",\"ucwgg\",\"xce\",\"jcubx\",\"wvl\",\"qsysa\",\"nlg\"],[\"qovcqn\",\"zxcz\",\"vojsno\",\"nqoqvc\",\"hnf\",\"gqewlkd\",\"uevax\",\"vuna\",\"fxjkbll\",\"vfge\"],[\"qrzf\",\"phwuf\",\"ligf\",\"xgen\",\"vkig\",\"elptd\",\"njdm\",\"gvqiu\",\"epfzsvk\",\"urbltg\",\"dqg\"],[\"sfpku\",\"viwihi\",\"fje\",\"umdkwvi\",\"ejzhzj\",\"qrbl\",\"sfpku\",\"sad\",\"nawnow\",\"ksnku\"],[\"nzhj\",\"mfudick\",\"ueaa\",\"jnhz\",\"kpy\",\"pzk\"]]\n",
+       "383\n",
+       "265"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "main"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 38,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList [(\"eild\",1),(\"gcne\",1),(\"jxczomh\",1),(\"kebx\",1),(\"meja\",1),(\"nrskdr\",1)]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "frequency $ parseLine \"kebx eild nrskdr meja jxczomh gcne\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 40,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "containsDuplicates passphrase = (not . M.null) $ M.filter (> 1) $ frequency passphrase"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 64,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "containsDuplicates = (not . M.null) . M.filter (> 1) . frequency"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 65,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "containsDuplicates $ parseLine \"kebx eild nrskdr meja jxczomh gcne\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 66,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "containsDuplicates $ parseLine \"kebx eild nrskdr meja jxczomh gcne meja\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 43,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "part1 passphrases = length $ filter (not . containsDuplicates) passphrases"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 46,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[[\"sayndz\",\"zfxlkl\",\"attjtww\",\"cti\",\"sokkmty\",\"brx\",\"fhh\",\"suelqbp\"],[\"xmuf\",\"znkhaes\",\"pggrlp\",\"zia\",\"znkhaes\",\"znkhaes\"],[\"nti\",\"rxr\",\"bogebb\",\"zdwrin\"],[\"sryookh\",\"unrudn\",\"zrkz\",\"jxhrdo\",\"gctlyz\"],[\"bssqn\",\"wbmdc\",\"rigc\",\"zketu\",\"ketichh\",\"enkixg\",\"bmdwc\",\"stnsdf\",\"jnz\",\"mqovwg\",\"ixgken\"],[\"flawt\",\"cpott\",\"xth\",\"ucwgg\",\"xce\",\"jcubx\",\"wvl\",\"qsysa\",\"nlg\"],[\"qovcqn\",\"zxcz\",\"vojsno\",\"nqoqvc\",\"hnf\",\"gqewlkd\",\"uevax\",\"vuna\",\"fxjkbll\",\"vfge\"],[\"qrzf\",\"phwuf\",\"ligf\",\"xgen\",\"vkig\",\"elptd\",\"njdm\",\"gvqiu\",\"epfzsvk\",\"urbltg\",\"dqg\"],[\"sfpku\",\"viwihi\",\"fje\",\"umdkwvi\",\"ejzhzj\",\"qrbl\",\"sfpku\",\"sad\",\"nawnow\",\"ksnku\"],[\"nzhj\",\"mfudick\",\"ueaa\",\"jnhz\",\"kpy\",\"pzk\"]]\n",
+       "383"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "main"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 47,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList [('e',1),('h',1),('l',2),('o',1)]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "frequency \"hello\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 48,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList [('e',1),('h',1),('l',2),('o',1)]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "frequency \"olleh\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 50,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList []"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "M.difference (frequency \"hello\") (frequency \"olleh\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 53,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList []"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "M.difference (frequency \"olleho\") (frequency \"hello\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 56,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "fromList [('e',1),('h',1),('l',2),('o',1)]"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "M.intersection (frequency \"olleh\") (frequency \"oohello\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 58,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "\"ehllo\""
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "sort \"hello\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 59,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "\"ehllo\""
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "sort \"olleh\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 60,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "containsAnagrams passphrase = containsDuplicates $ map sort passphrase"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 61,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "part2 passphrases = length $ filter (not . containsAnagrams) passphrases"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Haskell",
+   "language": "haskell",
+   "name": "haskell"
+  },
+  "language_info": {
+   "codemirror_mode": "ihaskell",
+   "file_extension": ".hs",
+   "name": "haskell",
+   "version": "8.0.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
-- 
2.34.1