# 2023 - Day 01
```elixir
Mix.install([
{:kino_aoc, git: "https://github.com/ljgago/kino_aoc"},
:kino,
:kino_vega_lite,
:explorer
# :nx,
])
alias VegaLite, as: Vl
alias Explorer.DataFrame, as: DF
alias Explorer.Series
ExUnit.start()
```
## Puzzle
[https://adventofcode.com/2023/day/1](https://adventofcode.com/2023/day/1)
<!-- livebook:{"attrs":{"assign_to":"puzzle_input","day":"1","session_secret":"AOC_TOKEN","year":"2023"},"chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
```elixir
{:ok, puzzle_input} =
KinoAOC.download_puzzle("2023", "1", System.fetch_env!("LB_AOC_TOKEN"))
```
## Solution
```elixir
defmodule Parse do
@digits %{
"1" => "1",
"2" => "2",
"3" => "3",
"4" => "4",
"5" => "5",
"6" => "6",
"7" => "7",
"8" => "8",
"9" => "9",
"one" => "1",
"two" => "2",
"three" => "3",
"four" => "4",
"five" => "5",
"six" => "6",
"seven" => "7",
"eight" => "8",
"nine" => "9"
}
def parse(input, get_digits_from_line_fn) do
input
|> String.split("\n", trim: true)
|> Enum.filter(fn s -> String.trim(s) != "" end)
|> Enum.map(fn line -> get_digits_from_line_fn.(line |> String.trim()) end)
end
def get_digits1(line) do
nums =
line
|> String.split("", trim: true)
|> Enum.map(&Integer.parse/1)
|> Enum.filter(fn x -> x != :error end)
{{first, _}, {last, _}} = {List.first(nums), List.last(nums)}
10 * first + last
end
def get_digits2(line) do
len = String.length(line)
digit_str =
Enum.reduce(
0..len,
"",
fn idx, acc ->
slice = line |> String.slice(idx..-1)
maybe_digit =
Enum.find(
@digits,
fn {digitstr, _v} -> slice |> String.starts_with?(digitstr) end
)
next_char =
case maybe_digit do
{_str, val} -> val
_ -> ""
end
acc <> next_char
end
)
get_digits1(digit_str)
end
end
```
```elixir
defmodule DayOne do
import Parse
def part_one(input) do
input
|> parse(&get_digits1/1)
|> Enum.sum()
end
def part_two(input) do
input
|> Parse.parse(&get_digits2/1)
|> Enum.sum()
end
end
```
```elixir
defmodule Test do
use ExUnit.Case, async: true
@example_input ~s(
1abc2
pqr3stu8vwx
a1b2c3d4e5f
treb7uchet
)
test "part 1" do
assert DayOne.part_one(@example_input) == 142
end
@example_input2 ~s(
two1nine
eightwothree
abcone2threexyz
xtwone3four
4nineeightseven2
zoneight234
7pqrstsixteen
)
test "part 2" do
assert DayOne.part_two(@example_input2) == 281
end
end
ExUnit.run()
```
## Test
```elixir
DayOne.part_one(puzzle_input)
```
```elixir
DayOne.part_two(puzzle_input)
```
<!-- livebook:{"offset":2864,"stamp":{"token":"XCP.LNxXq2vcI746FFgVxDWRA8t4BPUITcIT-2jWoe7x0SxDqAwz4b0SBMbx0Q04qtP-r3wVCajeCTMOrTSWbVBwNTqTMHhOEsAw2s-eLKhptGwnTLr7VA","version":2}} -->
