19 lines
417 B
Elixir
19 lines
417 B
Elixir
defmodule Day5Part1 do
|
|
def run do
|
|
File.stream!("input")
|
|
|> Stream.map(&String.trim/1)
|
|
|> Stream.map(&seat_id/1)
|
|
|> Enum.max()
|
|
|> IO.puts()
|
|
end
|
|
|
|
def char_to_bit(c) when c in 'FL', do: <<0::1>>
|
|
def char_to_bit(c) when c in 'BR', do: <<1::1>>
|
|
|
|
def seat_id(boarding_pass) do
|
|
<<id::10>> = for <<char <- boarding_pass>>, into: <<>>, do: char_to_bit(char)
|
|
id
|
|
end
|
|
end
|
|
|
|
Day5Part1.run()
|