Day 3: Mull It Over
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FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
- Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
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Elixir
defmodule AdventOfCode.Solution.Year2024.Day03 do
def part1(input) do
Regex.scan(~r/mul\((?<l>\d+),(?<r>\d+)\)/, input, capture: ["l", "r"])
|> Stream.map(fn l -> Enum.reduce(l, 1, &(&2 * String.to_integer(&1))) end)
|> Enum.sum()
end
def part2(input) do
input |> String.replace(~r/don't\(\).*(do\(\)|$)/Us, "") |> part1
end
end
