| Day | Title | Code | Tests | Tags | Difficulty |
|---|---|---|---|---|---|
| Day 1 | Historian Hysteria | code | tests | num list comparison, abs value | 🧊 |
| Day 2 | Red-Nosed Reports | code | tests | increasing/decreasing num list, deltas | 🧊 |
| Day 3 | Mull It Over | code | tests | regex, compiler | 🧊 |
| Day 4 | Ceres Search | code | tests | grid, crosswords | 🧊🧊 |
| Day 5 | Print Queue | code | tests | graph, topological sort, Kahn's | 🧊🧊🧊 |
| Day 6 | Guard Gallivant | code | tests | grid, move & turn, detect loops | 🧊🧊 |
| Day 7 | Bridge Repair | code | tests | equations, combos of + * ||, binary and ternary | 🧊🧊 |
| Day 8 | Resonant Collinearity | code | tests | grid, Manhattan distance | 🧊🧊 |
| Day 9 | Disk Fragmented | code | tests | disk fragmenting | 🧊🧊🧊 |
| Day 10 | Hoof It | code | tests | topographic map, bfs, dfs | 🧊🧊 |
| Day 11 | Plutonian Pebbles | code | tests | list growing exponentially | 🧊🧊🧊 |
| Day 12 | Garden Groups | code | tests | flood fill; area, perimeter and sides | 🧊🧊🧊 |