2,913 problems · Solve with AI-powered hints & explanations
| # | Title | Difficulty |
|---|---|---|
| 552 | Student Attendance Record II | Hard |
| 553 | Optimal Division | Medium |
| 554 | Brick Wall | Medium |
Page 10 of 59
| 556 |
| Next Greater Element III |
| Medium |
| 557 | Reverse Words in a String III | Easy |
| 558 | Logical OR of Two Binary Grids Represented as Quad-Trees | Medium |
| 559 | Maximum Depth of N-ary Tree | Easy |
| 560 | Subarray Sum Equals K | Medium |
| 561 | Array Partition | Easy |
| 563 | Binary Tree Tilt | Easy |
| 564 | Find the Closest Palindrome | Hard |
| 565 | Array Nesting | Medium |
| 566 | Reshape the Matrix | Easy |
| 567 | Permutation in String | Medium |
| 570 | Managers with at Least 5 Direct Reports | Medium |
| 572 | Subtree of Another Tree | Easy |
| 575 | Distribute Candies | Easy |
| 576 | Out of Boundary Paths | Medium |
| 577 | Employee Bonus | Easy |
| 581 | Shortest Unsorted Continuous Subarray | Medium |
| 583 | Delete Operation for Two Strings | Medium |
| 584 | Find Customer Referee | Easy |
| 585 | Investments in 2016 | Medium |
| 586 | Customer Placing the Largest Number of Orders | Easy |
| 587 | Erect the Fence | Hard |
| 589 | N-ary Tree Preorder Traversal | Easy |
| 590 | N-ary Tree Postorder Traversal | Easy |
| 591 | Tag Validator | Hard |
| 592 | Fraction Addition and Subtraction | Medium |
| 593 | Valid Square | Medium |
| 594 | Longest Harmonious Subsequence | Easy |
| 595 | Big Countries | Easy |
| 596 | Classes With at Least 5 Students | Easy |
| 598 | Range Addition II | Easy |
| 599 | Minimum Index Sum of Two Lists | Easy |
| 600 | Non-negative Integers without Consecutive Ones | Hard |
| 601 | Human Traffic of Stadium | Hard |
| 602 | Friend Requests II: Who Has the Most Friends | Medium |
| 605 | Can Place Flowers | Easy |
| 606 | Construct String from Binary Tree | Medium |
| 607 | Sales Person | Easy |
| 608 | Tree Node | Medium |
| 609 | Find Duplicate File in System | Medium |
| 610 | Triangle Judgement | Easy |
| 611 | Valid Triangle Number | Medium |
| 617 | Merge Two Binary Trees | Easy |
| 619 | Biggest Single Number | Easy |
| 620 | Not Boring Movies | Easy |
| 621 | Task Scheduler | Medium |
| 622 | Design Circular Queue | Medium |
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