1. 628. Maximum Product of Three Numbers

  2. 270. Closest Binary Search Tree Value

  3. 876. Middle of the Linked List

  4. 872. Leaf-Similar Trees

  5. 897. Increasing Order Search Tree

  6. 605. Can Place Flowers

  7. 56. Merge Intervals

  8. 448. Find All Numbers Disappeared in an Array

  9. 724. Find Pivot Index

  10. 687. Longest Univalue Path

  11. 997. Find the Town Judge

  12. 222. Count Complete Tree Nodes

  13. 783. Minimum Distance Between BST Nodes

  14. 532. K-diff Pairs in an Array

  15. 225. Implement Stack using Queues

  16. 235. Lowest Common Ancestor of a Binary Search Tree

  17. 697. Degree of an Array

  18. 844. Backspace String Compare

  19. 720. Longest Word in Dictionary

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