摘要： 题目描述：Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity.解题思路：分治方法。将K个List不断地分解为前半部分和后半部分。分别进行两个List的合并。... 阅读全文

摘要： 题目描述：Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, given n = 3, a solution set i... 阅读全文