摘要：
Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This 阅读全文
摘要：
Given an unsorted array of integers, find the length of longest increasing subsequence. Example: Input: [10,9,2,5,3,7,101,18] Output: 4 Explanation: T 阅读全文