carlwiedemann

require_relative "main"

module Day018
  INPUT = File.read("INPUT.txt")
  SIDE = 71
  LIMIT = 1024

  CORRUPT = "#"
  SAFE = "."

carlwiedemann

require_relative "main"

module Day017
  INPUT = File.read("INPUT.txt")

  ##########
  # Part 1 #
  ##########

  parts = INPUT.split("\n\n")

carlwiedemann

require_relative "main"

module Day016
  INPUT = File.read("INPUT.txt")

  grid = INPUT.to_grid

  CHAR_START = "S"
  CHAR_END = "E"
  EAST = V[1, 0]

carlwiedemann

require_relative "main"

module Day015
  INPUT = File.read("INPUT.txt")

  ROBOT = "@"
  BOX = "O"
  WALL = "#"
  EMPTY = "."

carlwiedemann

require_relative "main"

module Day014
  INPUT = File.read("INPUT.txt")
  WIDTH = 101
  HEIGHT = 103

  rs = INPUT.split("\n").map do |line|
    line.split(" ").map do |chunk|
      V[*chunk.split("=").last.split(",").map(&:to_i)]

carlwiedemann

require_relative "main"

module Day013
  INPUT = File.read("INPUT.txt")

  answer1 = 0
  answer2 = 0

  INPUT.split("\n\n").each do |group|
    ax, ay, bx, by, px1, py1 = group.split("\n").map { |line| line.split(",").map { |s| s[/\d+/].to_i } }.flatten

carlwiedemann

require_relative "main"

module Day012
  INPUT = File.read("INPUT.txt")

  grid = INPUT.to_grid
  origins = grid.each_with_object(Hash.new { |h, k| h[k] = [] }) { |v, value, a| a[value].push(v) }

  answer1 = 0
  answer2 = 0

carlwiedemann

require_relative "main"

module Day011
  INPUT = File.read("INPUT.txt")

  s = INPUT.split.map { [_1.to_i, 1] }.to_h

  convert = ->(n) do
    return [1] if n == 0
    t = n.to_s

carlwiedemann

require_relative "main"

module Day009
  INPUT = File.read("INPUT.txt")

  s = INPUT.strip

  expand = ->(s) { s.chars.each_with_object([]).with_index { |(c, a), i| c.to_i.times { a.push(i.even? ? i / 2 : nil) } } }

  checksum = ->(a) { a.each_with_index.sum { _2 * _1.to_i } }

carlwiedemann

require_relative "main"

module Day010
  INPUT = File.read("INPUT.txt")

  grid = INPUT.to_grid(cast_int: true)

  v0s = grid.each_with_object([]) { |v, h, a| a.push(v) if h == 0 }

  ##########