Advent of Code 2022 Solutions

This repo contains my Advent of Code 2022 solutions in Java 17. After providing it with your puzzle inputs (or your session token), running the program will print out the answers to all days of the puzzle. A Docker image is provided to ensure compatibility with machines that do not want to install the Java 17 runtime.

The goal of this repo is to provide fast, highly tested, and easy-to-use solutions. When run on my PC (an AMD Ryzen 9 3950X), all answers are output in ~3.6 seconds. OCR is also automatically performed for Day 10's puzzle to avoid requiring interpretation.

This repo may see changes in the future to improve runtime. If you have any suggestions, issues running the code, or find a correctness error: please open an issue or pull request.

Example output:

Day 01 Part 1: 75622
Day 01 Part 2: 213159
Day 02 Part 1: 15572
Day 02 Part 2: 16098
Day 03 Part 1: 7875
Day 03 Part 2: 2479
Day 04 Part 1: 540
Day 04 Part 2: 872
Day 05 Part 1: FJSRQCFTN
Day 05 Part 2: CJVLJQPHS
Day 06 Part 1: 1855
Day 06 Part 2: 3256
Day 07 Part 1: 1307902
Day 07 Part 2: 7068748
Day 08 Part 1: 1779
Day 08 Part 2: 172224
Day 09 Part 1: 6090
Day 09 Part 2: 2566
Day 10 Part 1: 14720
Day 10 Part 2: FZBPBFZF
Day 11 Part 1: 76728
Day 11 Part 2: 21553910156
Day 12 Part 1: 408
Day 12 Part 2: 399
Day 13 Part 1: 6272
Day 13 Part 2: 22288
Day 14 Part 1: 795
Day 14 Part 2: 30214
Day 15 Part 1: 5299855
Day 15 Part 2: 13615843289729
Day 16 Part 1: 1741
Day 16 Part 2: 2316
Day 17 Part 1: 3181
Day 17 Part 2: 1570434782634
Day 18 Part 1: 4628
Day 18 Part 2: 2582
Day 19 Part 1: 1418
Day 19 Part 2: 4114
Day 20 Part 1: 7004
Day 20 Part 2: 17200008919529
Day 21 Part 1: 142707821472432
Day 21 Part 2: 3587647562851
Day 22 Part 1: 30552
Day 22 Part 2: 184106
Day 23 Part 1: 4082
Day 23 Part 2: 1065
Day 24 Part 1: 326
Day 24 Part 2: 976
Day 25 Part 1: 121=2=1==0=10=2-20=2
Day 25 Part 2: Day 25 has no part 2

Providing Your Puzzle Input

There are two supported methods for inputting your puzzle data into this application.

Automatic Puzzle Fetcher (via Session Cookie)

First, get your cookie session data.

You will need to log into the Advent of Code website and then inspect your cookies. If you are using Chrome, you can follow the directions here.

You will be looking for a cookie called session. It will contain a long sequence of hexadecimal digits.

Place that data into a file called cookie.txt in the project directory.

The application will use that data to automatically fetch your puzzle input for each day.

Manual Input

This code will also look in a particular location on your local machine for puzzle input.

In the project directory, it will check a directory called puzzle. Within that directory it will expect Day 1's input to be in a file called 1, Day 2's input to be in a file called 2, etc.

You can find your puzzle input for a given day by logging into the Advent of Code website and then navigating to the URL for that puzzle's input.

The URL for your puzzle input will be at:

https://adventofcode.com/2022/day/${DAY}/input

where ${DAY} is the day number of the puzzle.

As an example, Day 1's input is at https://adventofcode.com/2022/day/1/input, Day 2's input is at https://adventofcode.com/2022/day/2/input, etc.

Docker Instructions (Mac/Linux)

1. Follow the instructions above for providing your puzzle input.
2. Run docker run --rm -it $(docker build -q .)

Windows Instructions

1. Follow the instructions above for providing your puzzle input.
2. Install JDK 17. You can follow the installation instructions here.
3. Open a command prompt and navigate to the project directory.
4. Run .\gradlew.bat run

Mac Instructions

1. Follow the instructions above for providing your puzzle input.
2. Install JDK 17. You can follow the installation instructions here.
3. Open Terminal and navigate to the project directory.
4. Run ./gradlew run

Linux Instructions

1. Follow the instructions above for providing your puzzle input.
2. Install JDK 17. You can follow the generic installation instructions here. Alternatively, you may want to search on Google for installation instructions specific to your distro.
3. Open a shell and navigate to the project directory.
4. Run ./gradlew run