defmodule Main do
  def input, do: IO.read(:line) |> String.trim
  def ii, do: input() |> String.to_integer
  def li, do: input() |> String.split |> Enum.map(&String.to_integer/1)
  def yn(b), do: IO.puts (if b, do: "Yes", else: "No")

  def main do
    n = ii()
    r = input() |> String.to_float

    Stream.iterate(100, fn x -> (1 - r) * x end)
    |> Enum.take(n)
    |> Enum.sum
    |> IO.puts
  end
end