# Day 01

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

## Section

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```elixir
{:ok, puzzle_input} =
  KinoAOC.download_puzzle("2024", "1", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
```

```elixir
{left, right} =
puzzle_input
|> String.split("\n", trim: true)
|> Enum.map(fn line ->
  line
  |> String.split(" ", trim: true)
  |> Enum.map(&String.to_integer/1)
  |> List.to_tuple()
end)
|> Enum.unzip()
```

## Part 1

```elixir
left
|> Enum.sort()
|> Enum.zip_with(Enum.sort(right), &abs(&1 - &2))
|> Enum.sum()
```

## Part 2

```elixir
freq_left = Enum.frequencies(left)
freq_right = Enum.frequencies(right)

freq_left
|> Enum.map(fn {id, n} -> id * n * Map.get(freq_right, id, 0) end)
|> Enum.sum()
```

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