題目鏈接
https://leetcode.com/problems/delete-operation-for-two-strings/description/
視頻鏈接：北大算法公開課
https://www.bilibili.com/video/av7134874/?p=42
解析
http://bookshadow.com/weblog/2017/05/15/leetcode-delete-operation-for-two-strings/
https://blog.csdn.net/C_Donald/article/details/77247758
這個(gè)題不一定是連續(xù)的子序列牺六。
