AdventOfCode/2020/elixir/day6/day6part2.exs

20 lines
413 B
Elixir

defmodule Day6Part2 do
def run do
File.stream!("input")
|> Stream.chunk_by(&(&1 == "\n"))
|> Stream.map(fn group ->
{count, frequencies} =
group
|> Enum.join()
|> String.to_charlist()
|> Enum.frequencies()
|> Map.pop(?\n)
Enum.count(frequencies, fn {_, v} -> v == count end)
end)
|> Enum.sum()
|> IO.puts()
end
end
Day6Part2.run()