sarahzrf

require 'set'

def fold(line, val)
  if val < line
    val
  elsif val > line
    line - (val - line)
  else
    raise "dot on line!"
  end

sarahzrf

require 'set'

def fold(line, val)
  if val < line
    val
  elsif val > line
    line - (val - line)
  else
    raise "dot on line!"
  end

sarahzrf

require 'set'

class CaveSystem
  def initialize
    @adjs = {}
  end

  def link(a, b)
    (@adjs[a] ||= Set.new) << b
    (@adjs[b] ||= Set.new) << a

sarahzrf

require 'set'

class CaveSystem
  def initialize
    @adjs = {}
  end

  def link(a, b)
    (@adjs[a] ||= Set.new) << b
    (@adjs[b] ||= Set.new) << a

sarahzrf

require 'set'

class Octopus
  def initialize(cave, x, y)
    @cave = cave
    @x = x
    @y = y
  end

  attr_reader :x, :y

sarahzrf

require 'set'

class Octopus
  def initialize(cave, x, y)
    @cave = cave
    @x = x
    @y = y
  end

  attr_reader :x, :y

sarahzrf

class Corrupted < Exception
  def initialize(got)
    @got = got
  end

  attr_reader :got
end

class Parser
  def initialize(text)

sarahzrf

class Corrupted < Exception
  def initialize(got)
    @got = got
  end

  attr_reader :got
end

class Parser
  def initialize(text)

sarahzrf

class Corrupted < Exception
  def initialize(got)
    @got = got
  end

  attr_reader :got
end

class Parser
  def initialize(text)

sarahzrf

require 'set'

class Cell
  def initialize(cave, x, y)
    @cave = cave
    @x = x
    @y = y
  end

  attr_reader :x, :y