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algos.rb
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algos.rb
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require 'set'
require './grid'
require './dict'
module Boggle
module Algos
class BruteForce
attr_reader :solutions, :grid
def initialize(grid, dict)
@grid = grid
@dict = dict
@solutions = Set.new
end
def solve
init_steps = (0...GRID_SIZE * GRID_SIZE).map{ |n| [n / GRID_SIZE, n % GRID_SIZE] }
explore!(init_steps)
end
private
def explore!(steps)
steps.each do |coord|
grid.move_to!(coord)
@solutions << grid.word if grid.word.size >= 3 && @dict.exists?(grid.word)
explore!(grid.next_steps)
grid.move_back!
end
end
end
class Subtil
attr_reader :solutions, :grid
def initialize(grid, dict)
@grid = grid
@dict = dict
@solutions = Set.new
end
def solve
init_steps = (0...GRID_SIZE * GRID_SIZE).map{ |n| [n / GRID_SIZE, n % GRID_SIZE] }
explore!(init_steps)
end
private
def explore!(steps)
steps.each do |coord|
grid.move_to!(coord)
case @dict.exists?(grid.word)
when :found
@solutions << grid.word
explore!(grid.next_steps)
when :prefix
explore!(grid.next_steps)
else
# do nothing
end
grid.move_back!
end
end
end
end
end