# Day 4
```elixir
Mix.install([
{:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
])
```
## Helper
<!-- livebook:{"attrs":{"day":"4","session_secret":"AOC_SESSION","variable":"puzzle_input","year":"2022"},"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
```elixir
{:ok, puzzle_input} = KinoAOC.download_puzzle("2022", "4", System.fetch_env!("LB_AOC_SESSION"))
```
```elixir
puzzle_input =
puzzle_input
|> String.split("\n", trim: true)
|> Enum.map(fn ranges ->
[first_range, second_range] = String.split(ranges, ",")
[first_range_start, first_range_end] = String.split(first_range, "-")
[second_range_start, second_range_end] = String.split(second_range, "-")
first_range = String.to_integer(first_range_start)..String.to_integer(first_range_end)
second_range = String.to_integer(second_range_start)..String.to_integer(second_range_end)
{MapSet.new(first_range), MapSet.new(second_range)}
end)
```
## Part 1
```elixir
puzzle_input
|> Enum.reduce(0, fn {first_range, second_range}, sum ->
case MapSet.subset?(first_range, second_range) ||
MapSet.subset?(second_range, first_range) do
false -> sum
true -> sum + 1
end
end)
```
## Part 2
```elixir
puzzle_input
|> Enum.reduce(0, fn {first_range, second_range}, sum ->
case MapSet.disjoint?(first_range, second_range) do
false -> sum + 1
true -> sum
end
end)
```
