| Problem | Difficulty |
|---|---|
| 700. Search in a Binary Search Tree | Easy |
| 98. Validate Binary Search Tree | Medium |
| 1038. Binary Search Tree to Greater Sum Tree | Medium (1375) |
| 235. Lowest Common Ancestor of a Binary Search Tree | Easy |
| 230. Kth Smallest Element in a BST | Medium |
| 653. Two Sum IV - Input is a BST | Easy |
| 530. Minimum Absolute Difference in BST | Easy |
| 173. Binary Search Tree Iterator | Medium |
- https://leetcode.com/problems/all-elements-in-two-binary-search-trees/description/ 1260
- https://leetcode.com/problems/minimum-distance-between-bst-nodes/description/ 1303
- https://leetcode.com/problems/range-sum-of-bst/ 1335
- https://leetcode.com/problems/find-mode-in-binary-search-tree/description/ e
- https://leetcode.com/problems/recover-binary-search-tree/description/ m
- https://leetcode.com/problems/convert-bst-to-greater-tree/description/ m
- https://leetcode.com/problems/closest-nodes-queries-in-a-binary-search-tree/description/ 1596
- https://leetcode.com/problems/maximum-sum-bst-in-binary-tree/description/ 1913
| Problem | Difficulty |
|---|---|
| 108. Convert Sorted Array to Binary Search Tree | Easy |
| 897. Increasing Order Search Tree | Easy (1473) |
| 701. Insert into a Binary Search Tree | Medium |
| @@450. Delete Node in a BST | Medium |
| **669. Trim a Binary Search Tree | Medium |
| 1382. Balance a Binary Search Tree | Medium (1540) |