经典刷题大全

https://algorithm.yuanbin.me/en/

code123刷题笔记

http://www.code123.cc/docs/leetcode-notes/integer_array/partition_array.html

算法笔记

https://www.kancloud.cn/kancloud/data-structure-and-algorithm-notes/73018

http://blog.csdn.net/lzuacm/article/details/51161721