AdventOfCode2021 VS Advent-of-Code

Full program on GitHub.

Full program including code to deal with heaps, on GitHub.

Program I used for the above results

See my solution on GitHub.

Note also that you can solve this without a complexity dependency on n. Most solutions I have seen, including mine run in time O(tD), where t is the maximum value of a timer, and D the number of generation, requiring O(t) memory. (This is assuming we can do the required arithmetic operations in constant time, and each numbers require a fixed around of memory storage; if the number of fish gets huge, throw in an additional log n in the complexities, where n is the number of fish on the final day).

Based on my matrix exponentiation solution, here is a closed-form solution:

In my Perl solution of today (I assume, you mean 2021, Day 4), I read stuff in paragraph mode ($/ = "") which makes Perl split input on 2 or more newlines.

I considered doing that for my (Perl) solution, but given the cards are small, that seemed overkill.

Python implementation on GitHub

Fun one :D

Way trickier than I was expecting

:D

Classic LCM

Who wants spaghetti?

Much easier than yesterday's :D

195/242

Messy. Thankfully got part two pretty quickly recognizing that we can mod the worry level by the product of the test integers. Might refactor / clean this up tomorrow morning

2343 / 2119

Impressive how fast everyone was with this one today