浜松ruby#58 その1

shuffle!

#!/usr/bin/env ruby

class Model
  attr_accessor :a, :b, :c, :d, :e, :f, :g, :h

  def attributes(arr)
    @a = arr[0]
    @b = arr[1]
    @c = arr[2]
    @d = arr[3]
    @e = arr[4]
    @f = arr[5]
    @g = arr[6]
    @h = arr[7]
    self
  end

  def calc
    _calc(a, b, c) + _calc(c, d, e) + _calc(e, f, g) + _calc(g, h, a)
  end

  def _calc(x, y, z)
    (100 * x) + (10 * y) + z
  end

  def answer
    b + d + f + h
  end
end

arr = (1..8).to_a
model = Model.new
while model.attributes(arr).calc != 1725
  arr.shuffle!
end
puts model.answer