class Calc0051
  def initialize
    args = STDIN.readlines.map { |l| l.chomp.split(/\s+/) }
    @w = args.shift.first.to_i
    @d = args.shift.first.to_i
  end

  def calc
    w = @w
    @d.step(2, -1) do |d|
      w -= Rational(w, d ** 2).floor
    end
    w
  end

  def run
    puts calc
  end
end

Calc0051.new.run if __FILE__ == $0