Dec 12, 2025 · 7 min read · Tetris, but make it elves. Today was all about figuring out whether oddly shaped presents could tile a given rectangle without overlaps. On paper it sounds like a straight polyomino packing question; in practice it turned into a tour through three di...
Join discussionDec 12, 2025 · 6 min read · Today’s problem looked like a straight "count the wire paths" exercise, but the density of the wiring diagram quickly turned it into a combinatorics workout. I ended up treating the factory like a directed acyclic graph of devices and tallying every ...
Join discussionDec 12, 2025 · 8 min read · Today’s puzzle felt like fixing two halves of the same machine: first we snap indicator lights into place with toggles, then we flip a lever and treat those same buttons like little add-one circuits. Two different algebra problems, one pile of schema...
Join discussionDec 9, 2025 · 8 min read · North Pole interior decorators handed me a loop of red tiles laid out on a huge floor. Part 1 wanted the largest axis-aligned rectangle that uses any two red tiles as opposite corners. Part 2 limited the rectangle to stay entirely inside the red/gree...
Join discussionDec 8, 2025 · 5 min read · Advent of Code 2025 — Day 8: Connecting Points with Union-Find It's that time of year again! For developers, December isn't just about hot cocoa and holiday lights; it’s about Advent of Code (AoC), the annual series of festive programming puzzles tha...
Join discussion
Dec 8, 2025 · 5 min read · Day 8 was basically a geometric Kruskal party. Every junction box is a point in 3D space, and connecting two points merges their electrical circuits. Part 1 stops after the 1000 closest connections; Part 2 runs until everything is fused into one mega...
Join discussionDec 8, 2025 · 6 min read · We find ourselves in a teleporter lab trying to fix a tachyon manifold. The puzzle input is a 2D grid representing the manifold. A tachyon beam starts at S and moves downwards. Empty space (.) allows the beam to continue straight down. However, split...
Join discussionDec 7, 2025 · 6 min read · Day 6 brings us into a garbage compactor where we meet a family of cephalopods. To pass the time while they open the door, we help the youngest one with her math homework. The puzzle involves parsing a 2D grid of characters representing math problems...
Join discussionDec 2, 2025 · 3 min read · It's that time of year again! For developers, December isn't just about hot cocoa and holiday lights; it’s about Advent of Code (AoC), the annual series of festive programming puzzles that challenge our logic, coding skills, and sometimes, our sanity...
Join discussion
Dec 1, 2025 · 7 min read · Hi guys, today was Day 2 of AoC 2025, and boy it was fun one Puzzle 1 Deduced problem: Given a set of ranges in the form [a, b], we had to find sum of all possible invalid IDs in these ranges. Invalid ID is an ID which is made only of some sequence o...
Join discussion