class Calc0175
  def initialize(args)
    args = args.map { |l| l.chomp.split(/\s+/) }
    @l = args.shift.first.to_i
    @n = args.shift.first.to_i
    @ss = args
  end

  def run
    2 ** (@l - 3) * @n
  end
end

puts Calc0175.new(STDIN.readlines).run if __FILE__ == $0