Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 585 | Investments in 2016 | Medium | Database |
| 586 | Customer Placing the Largest Number of Orders | Easy | Database |
| 588 | Design In-Memory File System | Hard | Hash TableStringDesign |
| 589 | N-ary Tree Preorder Traversal | Easy | StackTreeDepth-First Search |
| 590 | N-ary Tree Postorder Traversal | Easy | StackTreeDepth-First Search |
| 591 | Tag Validator | Hard | StringStack |
| 592 | Fraction Addition and Subtraction | Medium | MathStringSimulation |
| 593 | Valid Square | Medium | MathGeometry |
| 594 | Longest Harmonious Subsequence | Easy | ArrayHash TableSliding Window |
| 595 | Big Countries | Easy | Database |
| 596 | Classes With at Least 5 Students | Easy | Database |
| 597 | Friend Requests I: Overall Acceptance Rate | Unknown | Database |
| 597 | Non-negative Integers without Consecutive Ones | Hard | Dynamic Programming |
| 598 | Range Addition II | Easy | ArrayMath |
| 599 | Minimum Index Sum of Two Lists | Easy | ArrayHash TableString |
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