Advent of code reddit

Something advent of code reddit wrong with global snow production, and you've been selected to take a look. The Elves have even given you a map; on it, they've used stars to mark the top fifty locations that are likely to be having problems. You've been doing this long enough to know that to restore snow operations, you need to check all fifty stars by December 25th. Collect stars by solving puzzles.

Advent of Code is an excellent annual collection of programming puzzles. It's quickly become my favorite part of the holiday season as a celebration of programming: carefully crafted puzzles, amazing solutions spanning astonishing technical stacks, beautiful visualizations — with a sense of humor and joy around it all. The reason I recommend AoC strongly is because it's simply so much fun : there's a surreal and light-hearted Santa-themed story wound around each year's story, an amazing — and inspiring — community on Reddit ; and the puzzles are generally aimed towards teaching something new. I'd strongly recommend it even if you don't generally enjoy programming competitions like Code Jam or Hacker Cup. Very briefly: a new puzzle unlocks every night at midnight, Eastern time from 1st to 25th December. Each puzzle has 2 parts, with the 2nd part generally being a more complex variation on the theme. Inputs vary and can be large; occasionally involve ASCII art or other sentences that need to be parsed.

Advent of code reddit

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I'd strongly recommend it even if you don't generally enjoy programming competitions like Code Jam or Hacker Cup.

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You may have recently heard some talk about Advent of Code - every developer's favourite advent calendar. In this article, I'm going to try and explain why everyone can get something out of it. Advent of Code is a website that sets daily challenges for each day of advent. The context for each challenge tells part of a story that spans the full 25 days. Each day, you are presented with two problems that are designed to be challenging whilst remaining accessible to those without much programming experience.

Advent of code reddit

You're already almost 1. 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.

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It's quickly become my favorite part of the holiday season as a celebration of programming: carefully crafted puzzles, amazing solutions spanning astonishing technical stacks, beautiful visualizations — with a sense of humor and joy around it all. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the first. I do wish there was a way to ask for more compact output. Eric provides an excellent and easy to use API to fetch inputs, and submit solutions: so I wrote a small program that would fetch the input and write to stdout — which I could then pipe into my solution. For the first couple of weeks I was basically trying to write Python in Rust: not really relying on the typing system, keeping all the "business" logic in my head and simply manipulating plain data structures. I suspect this was my favorite day from AoC Writing about them — perhaps as notes in your code repo, tweets, blog posts, perhaps even a Substack if you're with the zeitgeist and an extrovert, or a Zettelkasten if you're an introvert — goes a very long way. The opportunity to see what others do on the same problem with similar constraints is extremely rare for me: so I really enjoy comparing my solutions with others' and learning from them. Consider your entire calibration document. For part 2, I ended up creating trees and then re-rooting them while parsing according to manually determined operator precedence rules. I ended up writing a CLI to speed me up and stop filling up my Downloads folder with input1. And people do. Blitzen One part of Advent of Code that I dislike is having to manually save the input files, and then pass them into my solution program somehow. My favorites include:. Sadly, that also meant giving up any hope of making it to the top this time around I achieved it once in !

You feel the ground rumble again as the distress signal leads you to a large network of subterranean tunnels. You don't have time to search them all, but you don't need to: your pack contains a set of deployable sensors that you imagine were originally built to locate lost Elves.

I wrote some code to break the input into tokens manually, and then simply evaluate left to right eagerly for part 1. I tried to profile my solution to Day I was a little surprised to learn that benchmarks needed nightly support, and ultimately ended up settling on using Inferno to generate Flamegraphs instead. Figuring out how this solution worked was fairly gratifying in itself:. I do wish there was a way to ask for more compact output. I rolled my own function to get a modular inverse and then successively reduced the equations by combining 2 constraints into 1 repeatedly till I got a single modular congruence, which I solved to get the least positive integer that worked.. After spending far too much time debugging my solution to Day 20 I decided to start leveraging the compiler instead and actually defining types and structs and enums. Using AoC as means to polish up my command of Rust seemed like an excellent opportunity. My favorites include:. And people do. Hexagonal grids and indexing Figuring out how to translate hexagonal movement into absolute coordinates was a lot of fun: the key insight to making this all work was realizing that I could represent a single point with several hexagonal paths — and a single set of x, y coordinates. Instead of looping from My favorite functions include cartesian product which is very useful for generating all possible neighbors for a given grid point. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the first.