# Day 12

```elixir
Mix.install([:kino_aoc])
```

## Parsing

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```elixir
{:ok, puzzle_input} =
  KinoAOC.download_puzzle("2025", "12", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
```

```elixir
{areas, boxes} =
  puzzle_input
  |> String.split("\n\n")
  |> List.pop_at(-1)
```

```elixir
areas =
  areas
  |> String.split("\n")
  |> Enum.map(fn raw ->
    [area | counts] = String.split(raw)

    area =
      area
      |> String.trim(":") 
      |> String.split("x")
      |> Enum.map(&String.to_integer/1)
      |> Enum.product()

    counts = Enum.map(counts, &String.to_integer/1)

    {area, counts}
  end)
```

```elixir
boxes =
  boxes
  |> Enum.map(fn <<_::binary-3>> <> rest ->
    rest
    |> String.to_charlist()
    |> Enum.count(&(&1 == ?#))
  end)
```

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## Part 1

```elixir
areas
|> Enum.count(fn {max, counts} ->
  counts
  |> Enum.zip_with(boxes, &*/2)
  |> Enum.sum()
  |> then(& &1 <= max)
end)
```

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## Part 2

FIN

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