Advent of Code

My adventures with Advent of Code, written in PHP. You can explore some of the solutions below:

Some serious shit is going on at the North Pole
Ugh, a very traumatic challenge
Help! Some goblins surrounded me in a cavern
There are some carts running in circles along the drawn path!
Usage of the Summed-area Table algo (and a nice visualization)
Blink and you miss it — animating stars in outer space
How next solutions become just a higher-level abstraction over existing realms
Implementing disk defragmentator — with some nice and colourful animations
The visualizations become animated and colored!
Finding isolated groups within a larger set of connected members
Plotting some graphs — as well as an optimization of two orders of magnitude
Nice and simple trick to simplify the problem
Writing a parser — not really required to solve the task, but a very fun and rewarding solution.
Smart solution to the spiral case — visualizing the problem and some nice maths to come up with an elegant solution
Solving a maze — once again, standing on the shoulders of giants — reusing maps and pathfinding, with nice visualization to accompany it.
Optimizing the compiler — reusing the existing Processor implementation to detect multiplication via nested inc loops, which cut the run time from ~20 minutes to fraction of a second.
Reusing the map module — again, visualizng the problem allowed to come up with an elegant solution
Again some visualizations to help me spot edge cases
Visualizing to recognize patterns — I calculated some of the results by hand and visualized them to uncover a more general pattern that allowed me to build a smart solution.
Cinematic password decrypting animation
Some first experiments with visualizations
Optimized combinations calculator
Folding the medicine molecule — this one was one of the first real challenges to find the smart solution. Some explorations there, but ultimately, no happy ending.