2015年7月14日
Reverse Nodes in k-Group
摘要： Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then l 阅读全文
posted @ 2015-07-14 22:29 gqtc 阅读(95) 评论(0) 推荐(0)
Merge k Sorted Lists
摘要： Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 思路：要快速找到k个元素中的最小值，使用堆这种数据结构。找到最小值后，还需要知道该最小值出自哪个链表， 阅读全文
posted @ 2015-07-14 17:50 gqtc 阅读(118) 评论(0) 推荐(0)
Generate Parentheses
摘要： Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: " 阅读全文
posted @ 2015-07-14 11:32 gqtc 阅读(93) 评论(0) 推荐(0)