d01.livemd

AoC 2022, D1

Section

defmodule D01 do
  def read_input(path \\ "inputs/d01") do
    {curr, final} =
      File.read!(path)
      |> String.split("\n", trim: false)
      |> Enum.reduce({0, []}, fn
        "", {curr, final} ->
          {0, [curr | final]}

        num, {curr, final} ->
          {num, ""} = Integer.parse(num)
          {curr + num, final}
      end)

    [curr | final] |> Enum.reverse()
  end

  def p1(calories), do: Enum.max(calories)

  def p2(calories) do
    calories
    |> Enum.sort(:desc)
    |> Enum.take(3)
    |> Enum.sum()
  end
end

{:module, D01, <<70, 79, 82, 49, 0, 0, 11, ...>>, {:p2, 1}}

ExUnit.start(autorun: false)

defmodule MyTest do
  use ExUnit.Case, async: true

  test "p1" do
    calories = D01.read_input()
    assert D01.p1(calories) == 69281
  end

  test "p2" do
    calories = D01.read_input()
    assert D01.p2(calories) == 201_524
  end
end

ExUnit.run()

..
Finished in 0.00 seconds (0.00s async, 0.00s sync)
2 tests, 0 failures

Randomized with seed 499033

%{excluded: 0, failures: 0, skipped: 0, total: 2}