2-3-4 Search Trees

### Giai đoạn: Nền Tảng & Khái Niệm Cốt Lõi **2-3-4 Search Trees** In practice: For every 2-4 tree, there are corresponding red–black trees with data elements in the same order. The insertion and deletion operations on 2-4 trees are also equivalent to color-flipping and rotations in red–black trees. This makes 2-4 trees an important tool for understanding the logic behind red–black trees, and this is why many introductory algorithm texts introduce 2-4 trees just before red–black trees, even though 2-4 trees are not often used in practice. ### Khái niệm cốt lõi: 1. **In practice: For every 2-4 tree, there are corresponding red–black trees with data elements in the same order** ### Tài liệu tham khảo chính thống: - [CS 61B Lecture 26: Balanced Search Trees](https://archive.org/details/ucberkeley_webcast_zqrqYXkth6Q) (article) - [Bottom Up 234-Trees](https://www.youtube.com/watch?v=DQdMYevEyE4&index=4&list=PLA5Lqm4uh9Bbq-E0ZnqTIa8LRaL77ica6) (video) - [Top Down 234-Trees](https://www.youtube.com/watch?v=2679VQ26Fp4&list=PLA5Lqm4uh9Bbq-E0ZnqTIa8LRaL77ica6&index=5) (video)