/tags/adventofcode/ Recent content in adventofcode on luis space Hugo -- gohugo.io en-us This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Fri, 17 Dec 2021 22:25:00 +0100 /posts/zet-8-aoc-2021-07/ Fri, 17 Dec 2021 22:25:00 +0100 /posts/zet-8-aoc-2021-07/ The challenge A giant whale has decided your submarine is its next meal, and it’s much faster than you are. There’s nowhere to run! Suddenly, a swarm of crabs (each in its own tiny submarine - it’s too deep for them otherwise) zooms in to rescue you! They seem to be preparing to blast a hole in the ocean floor; sensors indicate a massive underground cave system just beyond where they’re aiming! /posts/zet-7-aoc-2021-06/ Fri, 17 Dec 2021 22:19:00 +0100 /posts/zet-7-aoc-2021-06/ The challenge Part 1 The sea floor is getting steeper. Maybe the sleigh keys got carried this way? A massive school of glowing lanternfish swims past. They must spawn quickly to reach such large numbers - maybe exponentially quickly? You should model their growth rate to be sure. Although you know nothing about this specific species of lanternfish, you make some guesses about their attributes. Surely, each lanternfish creates a new lanternfish once every 7 days. /posts/zet-6-aoc-2021-05/ Fri, 17 Dec 2021 22:11:00 +0100 /posts/zet-6-aoc-2021-05/ The challenge Part 1 You come across a field of hydrothermal vents on the ocean floor! These vents constantly produce large, opaque clouds, so it would be best to avoid them if possible. They tend to form in lines; the submarine helpfully produces a list of nearby lines of vents (your puzzle input) for you to review. […] Each line of vents is given as a line segment in the format x1,y1 -> x2,y2 where x1,y1 are the coordinates of one end the line segment and x2,y2 are the coordinates of the other end. /posts/zet-5-aoc-2021-04/ Fri, 17 Dec 2021 22:04:00 +0100 /posts/zet-5-aoc-2021-04/ The challenge You’re already almost 1.5km (almost a mile) below the surface of the ocean, already so deep that you can’t see any sunlight. What you can see, however, is a giant squid that has attached itself to the outside of your submarine. Maybe it wants to play bingo? Bingo is played on a set of boards each consisting of a 5x5 grid of numbers. Numbers are chosen at random, and the chosen number is marked on all boards on which it appears. /posts/zet-4-aoc-2021-03/ Sat, 04 Dec 2021 00:08:00 +0100 /posts/zet-4-aoc-2021-03/ The challenge The submarine has been making some odd creaking noises, so you ask it to produce a diagnostic report just in case. The diagnostic report (your puzzle input) consists of a list of binary numbers which, when decoded properly, can tell you many useful things about the conditions of the submarine. The first parameter to check is the power consumption. You need to use the binary numbers in the diagnostic report to generate two new binary numbers (called the gamma rate and the epsilon rate). /posts/zet-3-aoc-2021-02/ Thu, 02 Dec 2021 19:02:00 +0100 /posts/zet-3-aoc-2021-02/ The challenge It seems like the submarine can take a series of commands like forward 1, down 2, or up 3: forward X increases the horizontal position by X units. down X increases the depth by X units. up X decreases the depth by X units. Note that since you’re on a submarine, down and up affect your depth, and so they have the opposite result of what you might expect. /posts/zet-2-aoc-2021-01/ Wed, 01 Dec 2021 18:03:00 +0100 /posts/zet-2-aoc-2021-01/ The challenge As the submarine drops below the surface of the ocean, it automatically performs a sonar sweep of the nearby sea floor. On a small screen, the sonar sweep report (your puzzle input) appears: each line is a measurement of the sea floor depth as the sweep looks further and further away from the submarine. […] The first order of business is to figure out how quickly the depth increases, just so you know what you’re dealing with - you never know if the keys will get carried into deeper water by an ocean current or a fish or something.