From bc8539d3615332f4f8ccd4addfa7db00a64992e3 Mon Sep 17 00:00:00 2001
From: Alpha Chen <alpha.chen@gmail.com>
Date: Wed, 9 Dec 2015 21:18:51 -0800
Subject: [PATCH] Day 8.0

---
 Gemfile      |   1 +
 Gemfile.lock |  20 +++
 day_08.rb    | 336 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 357 insertions(+)
 create mode 100644 day_08.rb

diff --git a/Gemfile b/Gemfile
index d0c1b96..1729954 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 source "https://rubygems.org"
 
+gem "letters"
 gem "minitest"
 gem "pry"
diff --git a/Gemfile.lock b/Gemfile.lock
index 6f0338c..a145e03 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,22 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    activesupport (4.2.5)
+      i18n (~> 0.7)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
+    awesome_print (1.6.1)
     coderay (1.1.0)
+    colorize (0.7.7)
+    i18n (0.7.0)
+    json (1.8.3)
+    letters (0.4.1)
+      activesupport
+      awesome_print
+      colorize
+      xml-simple
     method_source (0.8.2)
     minitest (5.8.3)
     pry (0.10.3)
@@ -9,11 +24,16 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     slop (3.6.0)
+    thread_safe (0.3.5)
+    tzinfo (1.2.2)
+      thread_safe (~> 0.1)
+    xml-simple (1.1.5)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  letters
   minitest
   pry
 
diff --git a/day_08.rb b/day_08.rb
new file mode 100644
index 0000000..3c07489
--- /dev/null
+++ b/day_08.rb
@@ -0,0 +1,336 @@
+require "letters"
+require "pry"
+
+class String
+  def escaped
+    escaped = ""
+
+    ss = StringScanner.new(self)
+    ss.scan(/"/)
+
+    while true
+      ss.scan(/[^\\]*/)
+      escaped << ss.matched if ss.matched?
+
+      break if ss.eos?
+
+      ss.skip(/\\/)
+
+      case ss.scan(/./)
+      when ?x
+        ss.skip(/../)
+        escaped << ?.
+      else
+        escaped << ss.matched
+      end
+    end
+
+    escaped.sub(/"$/, "")
+  end
+end
+
+num = DATA.read.each_line.map(&:chomp).inject(0) do |n,line|
+  n + line.size - line.escaped.size
+end
+puts num
+__END__
+"sjdivfriyaaqa\xd2v\"k\"mpcu\"yyu\"en"
+"vcqc"
+"zbcwgmbpijcxu\"yins\"sfxn"
+"yumngprx"
+"bbdj"
+"czbggabkzo\"wsnw\"voklp\"s"
+"acwt"
+"aqttwnsohbzian\"evtllfxwkog\"cunzw"
+"ugvsgfv"
+"xlnillibxg"
+"kexh\"pmi"
+"syvugow"
+"m\"ktqnw"
+"yrbajyndte\\rm"
+"f\"kak\x70sn\xc4kjri"
+"yxthr"
+"alvumfsjni\"kohg"
+"trajs\x5brom\xf1yoijaumkem\"\"tahlzs"
+"\"oedr\"pwdbnnrc"
+"qsmzhnx\""
+"\"msoytqimx\\tbklqz"
+"mjdfcgwdshrehgs"
+"\"rivyxahf\""
+"ciagc\x04bp"
+"xkfc"
+"xrgcripdu\x4c\xc4gszjhrvumvz\"mngbirb"
+"gvmae\"yiiujoqvr\"mkxmgbbut\"u"
+"ih"
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+"mkno\x43pcfdukmemycp"
+"uanzoqxkpsksbvdnkji\"feamp"
+"axoufpnbx\\ao\x61pfj\"b"
+"dz\\ztawzdjy"
+"ihne\"enumvswypgf"
+"\"dgazthrphbshdo\\vuqoiy\""
+"dlnmptzt\\zahwpylc\\b\"gmslrqysk"
+"mhxznyzcp"
+"rebr\"amvxw\x5fmbnfpkkeghlntavj"
+"lades\x47ncgdof\"\"jmbbk"
+"dwxuis\xa5wdkx\\z\"admgnoddpgkt\\zs"
+"g\\k\x27qsl\x34hwfglcdxqbeclt\xca\\"
+"lhyjky\\m\"pvnm\\xmynpxnlhndmahjl"
+"c\"uxabbgorrpprw\"xas\\vefkxioqpt"
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