https://blog.csdn.net/HarderXin/article/details/103971493?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase
https://blog.csdn.net/bjweimengshu/article/details/88053329
模拟面试
https://leetcode-cn.com/