defmodule Ant do
  @enforce_keys [:azimuth, :x, :y]
  defstruct [:azimuth, :x, :y]
 
  def walk(_current, "PREPARE"), do: %__MODULE__{azimuth: 0, x: 0, y: 0}
 
  def walk(%__MODULE__{azimuth: az} = old, "TURN " <> num) do
    {rot, ""} = Integer.parse(num)
 
    %{old | azimuth: rem(az + rot, 360)}
  end
 
  def walk(%__MODULE__{azimuth: az, x: x, y: y}, "MOVE " <> num) do
    {steps, ""} = Integer.parse(num)
    a = az / 180.0 * :math.pi()
    dx = :math.sin(a) * steps
    dy = :math.cos(a) * steps
 
    %__MODULE__{azimuth: az, x: x + dx, y: y + dy}
  end
 
  def length(%__MODULE__{x: x, y: y}), do: :math.sqrt(x * x + y * y)
end
 
:stdio
|> IO.stream(:line)
|> Stream.map(&String.trim/1)
|> Enum.reduce(nil, &Ant.walk(&2, &1))
|> Ant.length
|> Float.round(2)
|> IO.puts

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

UFJFUEFSRQpNT1ZFIDEwMApUVVJOIDI3MApNT1ZFIDEwMA==

PREPARE
MOVE 100
TURN 270
MOVE 100