Leetcode-Quesition-30: Substring with Concatenation of All Words

Original Link:

https://leetcode.com/problems/substring-with-concatenation-of-all-words/

Solution:

【Approach #1】Native Method

【Approach#2】

 

Leetcode-Question-65: Valid Number

原文链接:

https://leetcode.com/problems/valid-number/

解析: