defmodule Main do
  def main do
    _ = IO.gets("")
    sorted_list = IO.gets("") |> String.trim |> String.split |> Enum.map(&String.to_integer/1) |> Enum.sort 
    index = median_index(sorted_list)
    median(sorted_list, index) |> IO.puts
  end
  
  def median(sorted_list, index) when is_integer(index) do
    sorted_list |> Enum.at(index)
  end
  
  def median(sorted_list, index) when is_list(index) do
    index |> Enum.map(&Enum.at(sorted_list, &1)) |> Enum.sum |> (fn sum -> sum/2 end).()
  end
  
  def median_index(sorted_list) do
    list_count = sorted_list |> Enum.count
    case list_count |> rem(2) do
      0 -> list_count/2 - 0.5 |> (fn hoge -> [floor(hoge), ceil(hoge)] end).()
      1 -> list_count/2 - 0.5 |> ceil
    end
  end
end