# BST

- [669. Trim a Binary Search Tree](/cracking-leetcode/tree/bst/669.-trim-a-binary-search-tree.md)
- [99. Recover Binary Search Tree](/cracking-leetcode/tree/bst/99.-recover-binary-search-tree.md)
- [501. Find Mode in Binary Search Tree](/cracking-leetcode/tree/bst/501.-find-mode-in-binary-search-tree.md)
- [96. Unique Binary Search Trees](/cracking-leetcode/tree/bst/96.-unique-binary-search-trees.md)