Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1486 | Lexicographically Smallest String After Applying Operations | Medium | StringDepth-First SearchBreadth-First Search |
| 1487 | Lexicographically Smallest String After Operations With Constraint | Medium | StringGreedy |
| 1488 | Lexicographically Smallest String After Substring Operation | Medium | StringGreedy |
| 1489 | License Key Formatting | Easy | String |
| 1490 | Line Reflection | Medium | ArrayHash TableMath |
| 1491 | Linked List Components | Medium | ArrayHash TableLinked List |
| 1492 | Linked List Cycle | Easy | Hash TableLinked ListTwo Pointers |
| 1493 | Linked List Cycle II | Medium | Hash TableLinked ListTwo Pointers |
| 1494 | Linked List Frequency | Unknown | Hash TableLinked ListCounting |
| 1495 | Linked List in Binary Tree | Medium | Linked ListTreeDepth-First Search |
| 1496 | Linked List Random Node | Medium | Linked ListMathReservoir Sampling |
| 1497 | List the Products Ordered in a Period | Easy | Database |
| 1498 | Loan Types | Easy | Database |
| 1499 | Logger Rate Limiter | Easy | Hash TableDesignData Stream |
| 1500 | Lonely Pixel I | Medium | ArrayHash TableMatrix |
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