AoC 2023 Day 2: Playinator

2023-12-02

Source: Day 2: Cube Conundrum

Full solution for today (spoilers!). Note: I did slightly change my solutions template after writing this blog post, so the final solution is structured slightly differently than the code in this post. The functionality itself hasn’t changed.

Part 1

Play a game where you have some number of red, green, and blue dice in a cup, which you draw and roll (without replacement). Which game is possible with only 12 red, 13 gree, and 14 blue cubes?

Input will look like: Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green

AoC 2023 Day 1: Calibrationinator

2023-12-01

Source: Day 1: Trebuchet?!

Part 1

Given a list of alphanumeric strings, find the first and last digit on each line (they may be the same). Concatenate each pair and sum them.

Advent of Code 2023

2023-12-01

Another year, another Advent of Code.

Like last year, we’re doing Rust. I’ve really grown to love the language since last year… and hopefully I’ve learned a bit more about how to write more ‘proper’ Rust. I know I had some issues last year. Functional… but it could be better.

Let’s see how it goes!

For full solutions, as always, I post to GitHub (including previous years and possibly some I haven’t written up yet): jpverkamp/advent-of-code

AoC 2022 Day 25: Snafuinator

2022-12-25

Source: Full of Hot Air

Part 1

Let a Snafu number be a base 5 number with the curious property that in addition to the digits 0, 1, and 2, it has the numbers - as -1 and = as -2. Sum up a list of Snafu numbers.

AoC 2022 Day 24: Blizzinator

2022-12-24

Source: Blizzard Basin

Part 1

Given a map with a series of moving walls (that wrap when the hit the edges of the simulation), calculate the fastest route from the top left to the bottom right.

AoC 2022 Day 23: Elf Scattinator

2022-12-23

Source: Unstable Diffusion

Part 1

Implement a cellular automaton with the following rules:

If you have no neighbors, don’t move (important, I forgot this one for a while)
Otherwise:
- Calculate a potential move:
  - If you have no neighbors to the north, move north
  - If not, check likewise for south, then west, than east
- If no other agent is moving to the same space, move to your potential move
- Otherwise, don’t move
On each frame, rotate the order the directions are checked in (NSWE, SWEN, WENS, ENSW, NSWE, …)

AoC 2022 Day 22: Wonderator

2022-12-22

Source: Monkey Map

Part 1

Given a map and a series of instructions formatted as distance + turn (L or R), find the final position. Any time you would walk off the edge of the map, wrap to the opposite edge.

AoC 2022 Day 21: Yellinator

2022-12-21

Source: Monkey Math

Part 1

Given a series of equations of either the form dbpl: 5 or cczh: sllz + lgvd, determine what the value of the node labeled root is.

AoC 2022 Day 20: Deencryptinator

2022-12-20

Source: Grove Positioning System

Part 1

Given a list of numbers mix them by moving each number forward/backward in the list based on it’s value. For example, in 4, -2, 5, 6, 7, 8, 9 moving the -2 will result in 4, 5, 6, 7, 8, -2, 9. Each number should be moved exactly once in the original order they appeared in the list.

AoC 2022 Day 19: Blueprintinator

2022-12-19

Source: Not Enough Minerals

Part 1

Given a series of given a series of blueprints, each of which gives instructions for how to build a single robot from a collection of materials that in turn will produce one of a given material per turn, determine the best order of builds to maximize your geode (the most valuable material) production for each blueprint given a time limit of 24 minutes.