Created
December 13, 2017 00:21
-
-
Save maruks/3913438fef74cdff7a056ea5df7565b3 to your computer and use it in GitHub Desktop.
Advent of Code, Day 12
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
defmodule Plumber do | |
def input do | |
"/Users/maris/Projects/Advent_of_code_2017/plumber/test/input" |> | |
File.stream!() |> | |
Enum.map(&(Regex.split(~r/\D+/, String.trim(&1)))) |> | |
Enum.reduce(%{}, fn([first | rest],acc) -> Map.put(acc,first,rest) end ) | |
end | |
def count([], acc, input) do | |
case Map.keys(input) do | |
[first | _ ] -> count(Map.get(input,first,[]), acc + 1, Map.delete(input, first)) | |
[] -> acc | |
end | |
end | |
def count([first | rest], acc, input) do | |
queue = Map.get(input, first, []) |> Enum.filter(&(Map.has_key?(input,&1))) | |
count(queue ++ rest, acc, Map.delete(input, first)) | |
end | |
def howMany do | |
count([], 0, input()) | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment