defmodule Main do
  
  def main do
    [n, k] = IO.read(:line) |> String.trim() |> String.split(" ") |> Enum.map(&String.to_integer/1)
    an = IO.read(:line) |> String.trim() |> String.split(" ") |> Enum.map(&String.to_integer/1)
    solve(n, k, an) |> IO.puts()
  end

  def solve(n, k, an) when 1 <= k and k <= n and n <= 100 do
    an
    |> Enum.sort(&(&1 > &2))
    |> Enum.reject(&(&1 < 1))
    |> (fn
      [] ->
        [t | _] = an
        [t]
      x ->
        x
    end).()
    |> Stream.take(k)
    |> Enum.reduce(0, &(&1 + &2))
  end

end