http://adventofcode.com/2022

• write as little code as possible
• while maintaining readability
• try maximizing performance
• no dependencies, just a PHP8 environment

Each day's solution resides in a numbered directory containing a text file input.txt as input data and solve.php for processing.

Run using php-cli, e.g.:

php 01/solve.php

To profile execution time and memory usage, use (for day 1 for example):

php profile.php 1

For the following days you can generate SVGs (output_1.svg resp. output_2.svg in the day's folder). Just include visualize.php and uncomment the createSVG() calls.

• Day 8: overall tree map (darker = higher), best tree hilighted in part 2
• Day 9: trails of tails color coded from red (beginning) to blue (end)
• Day 12: height map with the found path
• Day 14: the rock structure and sand piles