Advent of Code 2025

adventofcode11.rb

dial = 50
password = 0
File.read("./input.txt").split("\n").each do |dial_movement|
  movement, amount = dial_movement[0],dial_movement[1..-1].to_i
  amount *= -1 if movement == "L"

  dial += amount
  dial -= 100 while dial > 99
  dial += 100 while dial < 0

  password += 1 if dial == 0
end
puts "Password is #{password}"

adventofcode12.rb

dial = 50
password = 0
File.read("./input.txt").split(/\r?\n/).each do |dial_movement|
  movement, amount = dial_movement[0],dial_movement[1..-1].to_i
  amount *= -1 if movement == "L"

  dial = 100 if dial == 0 && movement == "L"

  dial += amount
  while dial > 100
    dial -= 100
    password += 1
  end
  while dial < 0
    dial += 100
    password += 1
  end
  dial = 0 if dial == 100
  password += 1 if dial == 0
end
puts "Password is #{password}"