База - [[Графы]]
## Примеры задач
- [[Префиксные деревья]]
- [[Binary Tree Maximum Path Sum]]
- [[BST]]
- [[Lowest Common Ancestor of a Binary Tree]]
- [[Lowest Common Ancestor of a Binary Tree III]]
- [[Max Stack]]
- [[Range Sum of BST]]
- [[Symmetric Tree]]
- [[Validate Binary Search Tree]]