Advent Of Code 2015, Day 13: Cutting Down On Permutations

Day 13 is very similar to day 9, just this time we are looking for the optimal seating arrangement around a Christmas table. Both puzzles are very similar but they have slightly different properties which means... we only need a subset of permutations to solve today's one. Getting the arrangements For day 9 we had…

Advent Of Code 2015, Day 11: Getting Valid Passwords

Even Santa must change his password from time to time. Unfortunately, this time he needs our help because his new Security-Elf imposed some additional password requirements. A new password should be generated using Santa's incremental method and then validated to ensure it is not breaking any safety rules. Generating Passwords The first step to get…