bu.ex

input = File.read!("/Users/anton/Desktop/input") |> String.split("\n")

a = input |> Enum.map(&String.length/1) |> Enum.sum
b = input |> Enum.map(fn a -> Regex.scan(~r/(\\x[a-f0-9]{2}|\\\"|\\\\|\")/, a) |> length end) |> Enum.map(&(&1 - 2)) |> Enum.sum
c = input |> Enum.map(fn a -> Regex.split(~r/(\\x[a-f0-9]{2}|\\\"|\\\\|\")/, a, trim: true) |> Enum.map(&String.length/1) |> Enum.sum end) |> Enum.sum

a - b - c

## Part 2

input = File.read!("/Users/anton/Desktop/input") |> String.split("\n")

a = input |> Enum.map(&String.length/1) |> Enum.sum
b = input |> Enum.map(fn a -> Regex.scan(~r/(\"|\\)/, a) |> Enum.map(&length/1) |> Enum.sum end) |> Enum.map(&(&1 + 2)) |> Enum.sum
c = input |> Enum.map(fn a -> Regex.split(~r/(\"|\\)/, a, trim: true) |> Enum.map(&String.length/1) |> Enum.sum end) |> Enum.sum

b + c - a