平台
https://leetcode-cn.com/
https://github.com/selfboot/LeetCode
常用算法总结（方法论）
动态规划
回溯
解题办法
https://mp.weixin.qq.com/s/fECqsr3T4WKNcx7s-2ozuA
资料：
https://github.com/MisterBooo/LeetCodeAnimation
https://cxyxiaowu.com/
http://joshuablog.herokuapp.com/Leetcode-%E6%80%BB%E7%BB%93.html
https://coolshell.cn/articles/12052.html
