defmodule Main do
    def getsAll(device \\ :stdio, prompt), do: getsAll(device, prompt, "")
    defp getsAll(device, prompt, input) do
        x = IO.gets(device, prompt)
        case x do
            {:error, _} -> x
            :eof -> input
            _ -> getsAll(device, prompt, input <> x)
        end
    end
    def main do

        inputs = getsAll(nil) |> String.split

        as = inputs |> Enum.slice(1..-1) |> Enum.map(&(String.to_integer(&1)))

        IO.puts Enum.sum(as)

    end
end