class Manage_list
attr_reader :list_detail
@@processing_number = 0
  def initialize
    @list_detail = []
  end
  def self.display_processing_number
    @@processing_number
  end

  def add_applicant(name)
    @list_detail << name
    @@processing_number += 1
  end
  
  def remove_applicant(name)
    @list_detail.delete(name)
    @@processing_number -= 1
  end
end