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Ranked list — switch sort or use Random for a fresh mix each visit.
| # | Problem | Topic | Difficulty | XP | Acceptance | Actions |
|---|---|---|---|---|---|---|
| 1 | Two Sum two-sum | Easy | 10 | 67% | ||
| 2 | 0-1 BFS: Minimum Obstacle Removal ds257 | Shortest Path Algorithms | Hard | 80 | — | |
| 3 | 0/1 Knapsack ds151 | Dynamic Programming | Medium | 40 | — | |
| 4 | 01 Matrix (Distance to Nearest Zero) ds394 | Grid Search (BFS & DFS) | Medium | 40 | — | |
| 5 | 132 Pattern ds344 | Stack (Advanced) | Medium | 40 | — | |
| 6 | 3-Day Moving Average sql044 | Window Functions | Medium | 40 | — | |
| 7 | 3Sum ds061 | Two Pointers & Sliding Window | Medium | 40 | — | |
| 8 | Abandoned Carts sql315 | Sales Funnel & Conversion | Easy | 10 | — | |
| 9 | Above Department Average Salary sql296 | Correlated Subqueries | Medium | 40 | — | |
| 10 | Accounts Merge ds171 | Disjoint Set (Union-Find) | Medium | 40 | — | |
| 11 | Accounts That Went Into Overdraft sql164 | Banking & HR Case Studies | Medium | 40 | — | |
| 12 | Accounts That Went Negative sql307 | Reconciliation & Balances | Medium | 40 | — |
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