input

2 6

rabbits.rb

class Rabbit

  @result = 0 

  def read
    File.open("./input", "r") do |file|  
      file.each_line do |line|
        args = line.split
        jump = args[0].to_i
        stairs = args[1].to_i
        trace(jump, stairs)
      end
    end    
  end

private 

  def trace(jump, stairs, position = 0)
    for i in 1..jump do 
      if position + i < stairs
        puts "before increment #{position}"
        position += i
        puts "after increment #{position}"
        trace(jump, stairs, position) 
      elsif position + jump == stairs 
        puts "stairs end!"
        @result += 1
        puts "result #{@result}"
      end    
    end
    
  end
    

  def show(res)
    puts "SUM #{res}"
  end

end


check = Rabbit.new
check.read