1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
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

  def encoded
    "\"#{self.gsub(/(\\|")/, '\\\\\1')}\""
  end
end

num = DATA.read.each_line.map(&:chomp).inject(0) do |n,line|
  n + line.encoded.size - line.size
end
puts num
__END__