| # | title | topic | type | difficulty |
|---|---|---|---|---|
| 1 | Quicksort from scratch | Sorting Algorithms | Coding | Hard |
| 2 | Merge sort — prove it's stable | Sorting Algorithms | Coding | Hard |
| 3 | Multi-key sort with a composed comparator | Sorting Algorithms | Coding | Hard |
| 4 | The move with no score went last, and the comparator never saw it | Sorting Algorithms | Multiple choice |
| Hard |