52 lines
1.1 KiB
Elixir
52 lines
1.1 KiB
Elixir
defmodule AdventOfCode.Day02 do
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@moduledoc """
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Day 2
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"""
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end
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defmodule AdventOfCode.Day02.Part1 do
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@moduledoc """
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Day 2, Part 1
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"""
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alias AdventOfCode.PuzzleSolver
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use PuzzleSolver
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import AdventOfCode.Day02, warn: false
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@impl PuzzleSolver
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def solve(input_stream) do
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input_stream
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|> Stream.map(&String.trim/1)
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|> Stream.map(&parse_action/1)
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|> Enum.reduce({0, 0}, &apply_action/2)
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|> product()
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end
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defp parse_action("forward " <> v), do: {:forward, String.to_integer(v)}
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defp parse_action("down " <> v), do: {:down, String.to_integer(v)}
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defp parse_action("up " <> v), do: {:up, String.to_integer(v)}
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defp apply_action({:forward, v}, {horiz, depth}), do: {horiz + v, depth}
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defp apply_action({:down, v}, {horiz, depth}), do: {horiz, depth + v}
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defp apply_action({:up, v}, {horiz, depth}), do: {horiz, depth - v}
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defp product({x, y}), do: x * y
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end
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defmodule AdventOfCode.Day02.Part2 do
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@moduledoc """
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Day 2, Part 2
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"""
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alias AdventOfCode.PuzzleSolver
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use PuzzleSolver
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import AdventOfCode.Day02, warn: false
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@impl PuzzleSolver
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def solve(_input_stream) do
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:ok |> to_string()
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end
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end
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