toyamarb_q2.rb

toyamarb_q2.rb

#解けてない

module Q2
  def self.strike
    strikes = [1, 2]

    #5以外を抜くボールの枚数の重複なし組み合わせを求める
    result1 = []
    (1..8).each do |n|
      strikes.repeated_combination(n).each do |ss|
        result1 << ss if ss.inject(:+) == 8
      end
    end
    #result1 = (1,1,1,1, 1,1,1,1), (1,1,1,1, 1,1,2), ... (2,2,2,2)
    
    #5以外を2枚抜くパターンを求める
    result2 = []
    result1.each do |r|
      r.permutation(r.count).each do |rr|
        result2 << rr
      end
    end

    final = 0
    result2.each{|r| final = final + r.count + 1}
    final
  end
end

puts "answer : #{Q2.strike}"