Day1

Mix.install([
  {:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
])

Get Input

{:ok, data} = KinoAOC.download_puzzle("2023", "1", System.fetch_env!("LB_AOC_SECRET"))

Task1

data
|> String.split()
|> Enum.map(fn row ->
  digits = Regex.scan(~r/\d/, row) |> List.flatten()
  [h | _t] = digits
  t = List.last(digits)
  (h <> t) |> String.to_integer()
end)
|> Enum.sum()

Task2

w2d = %{
  "one" => "o1e",
  "two" => "t2o",
  "three" => "t3e",
  "four" => "f4r",
  "five" => "f5e",
  "six" => "s6x",
  "seven" => "s7n",
  "eight" => "e8t",
  "nine" => "n9e"
}

keys = Map.keys(w2d)

dt = """
two1nine
eightwothree
abcone2threexyz
xtwone3four
4nineeightseven2
zoneight234
7pqrstsixteen
"""

data
|> String.split()
|> Enum.map(fn row ->
  drow =
    Enum.reduce(w2d, row, fn {word, digit}, acc ->
      String.replace(acc, word, digit)
    end)

  digits = Regex.scan(~r/\d/, drow) |> List.flatten()
  h = List.first(digits)
  t = List.last(digits)
  (h <> t) |> String.to_integer()
end)
|> Enum.sum()