defmodule Main do
  def main do
    [p, q, n] =
      1..3
      |> Enum.map(fn _ ->
        IO.read(:line)
        |> String.trim()
        |> String.to_integer()
      end)

    s =
      1..n
      |> Enum.map(fn _ ->
        IO.read(:line)
        |> String.trim()
        |> String.to_integer()
      end)

    solve(s, p, q)
    |> IO.puts()
  end

  def solve(s, p, q) do
    ((s |> length) - (s |> Enum.uniq() |> length)) * (p + q)
  end
end