1. 997. Find the Town Judge

  2. 270. Closest Binary Search Tree Value

  3. 687. Longest Univalue Path

  4. 783. Minimum Distance Between BST Nodes

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

  6. 671. Second Minimum Node In a Binary Tree

  7. 669. Trim a Binary Search Tree

  8. 110. Balanced Binary Tree

  9. 257. Binary Tree Paths

  10. 112. Path Sum

  11. 108. Convert Sorted Array to Binary Search Tree

  12. 1108. Defanging an IP Address

  13. [todo] 687. Longest Univalue Path

  14. 111. Minimum Depth of Binary Tree

  15. 559. Maximum Depth of N-ary Tree

  16. 993. Cousins in Binary Tree

  17. 690. Employee Importance

  18. team game

  19. fib

  20. hashmap

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