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hauleth.dev
1# Day 06
2
3```elixir
4Mix.install([:kino_aoc])
5```
6
7## Setup
8
9<!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiI2Iiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjUifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
10
11```elixir
12{:ok, puzzle_input} =
13 KinoAOC.download_puzzle("2025", "6", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
14```
15
16```elixir
17{tasks, [ops]} =
18 puzzle_input
19 |> String.split("\n", trim: true)
20 |> Enum.split(-1)
21```
22
23```elixir
24ops =
25 ops
26 |> String.split()
27 |> Enum.map(&String.to_atom/1)
28```
29
30## Part 1
31
32```elixir
33tasks
34|> Enum.map(&String.split/1)
35|> Enum.zip_with(fn numbers -> Enum.map(numbers, &String.to_integer/1) end)
36|> Enum.zip(ops)
37|> Enum.sum_by(fn
38 {nums, :+} -> Enum.sum(nums)
39 {nums, :*} -> Enum.product(nums)
40end)
41```
42
43## Part 2
44
45```elixir
46tasks
47|> Enum.map(&String.to_charlist/1)
48|> Enum.zip_with(&(&1 |> List.to_string() |> String.trim()))
49|> Enum.chunk_while(
50 [],
51 fn
52 "", acc -> {:cont, acc, []}
53 num, acc -> {:cont, [String.to_integer(num) | acc]}
54 end,
55 &{:cont, &1, []}
56)
57|> Enum.zip(ops)
58|> Enum.sum_by(fn
59 {nums, :+} -> Enum.sum(nums)
60 {nums, :*} -> Enum.product(nums)
61end)
62```
63
64<!-- livebook:{"offset":1229,"stamp":{"token":"XCP.uuy6Ksg23kO8DXLs0nEHWRa2q8MnTF00fl1kNBDi-xlsQ1DZ_teumvy__d8PZSNG_VIsQ9fTr1rGiHu3aFBxxeOD5uVO2plujrne43wrcKxIt7wi6AInBo9LuC1gXgwFgw","version":2}} -->