Day 4 required solving an iterative spatial problem. I used spatial indexing for efficient neighbor counting and a BFS simulation to model the cascading removal of paper rolls.
The Day 3 challenge demanded maximizing a 12-digit sequence, testing our system's architectural resilience. See the journey from flawed assumptions to implementing the optimized stack, ensuring robustness against extreme scale via BigInt.
A Principal Architect's breakdown of AoC Day 2. See how TDD and architectural discipline hold up under new requirements, and the limits of AI in generating governed tests.