摘要：
http://poj.org/problem?id=2492 Background Professor Hopper is researching the sexual behavior of a rare species of bugs. He assumes that they feature 阅读全文
摘要：
https://leetcode.com/problems/remove-element/description/ Given an array nums and a value val, remove all instances of that value in-place and return 阅读全文
摘要：
https://leetcode.com/problems/valid-parentheses/description/ Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine 阅读全文