算法导论 第三版 习题答案 及红黑树讲解视频
https://walkccc.me/CLRS/Chap02/2.2/
https://www.bilibili.com/video/BV135411h7wJ?p=13
红黑树原理 新增,删除,打印: https://www.cnblogs.com/hongdada/p/12165636.html
通过2-3-4树理解红黑树:
https://blog.csdn.net/t4i2b10X4c22nF6A/article/details/113064956
打印红黑树: https://blog.csdn.net/dean_gdp/article/details/41407545?utm_term=%E7%BA%A2%E9%BB%91%E6%A0%91%E5%8F%AF%E8%A7%86%E5%8C%96%E7%95%8C%E9%9D%A2&utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~sobaiduweb~default-3-41407545&spm=3001.4430