438. Find All Anagrams in a String

Given a stringsand anon-emptystringp, find all the start indices ofp's anagrams ins.

Strings consists of lowercase English letters only and the length of both stringssandpwill not be larger than 20,100.
The order of output does not matter.
Example 1:
Input:s: "cbaebabacd" p: "abc"Output:[0, 6]Explanation:The substring with start index = 0 is "cba", which is an anagram of "abc".The substring with start index = 6 is "bac", which is an anagram of "abc".

滑动窗口 代码懂了， 但是不能变成自己的知识， 需要再看一遍。