zhanghill

2016年1月15日

摘要： There are a total ofncourses you have to take, labeled from0ton - 1.Some courses may have prerequisites, for example to take course 0 you have to firs... 阅读全文

posted @ 2016-01-15 11:46 zhanghill 阅读(850) 评论(0) 推荐(0)

209. Minimum Size Subarray Sum

摘要： Given an array ofnpositive integers and a positive integers, find the minimal length of a subarray of which the sum ≥s. If there isn't one, return 0 i... 阅读全文

posted @ 2016-01-15 11:29 zhanghill 阅读(429) 评论(0) 推荐(0)

2016年1月14日

207. Course Schedule (易理解拓扑排序解法)

摘要： There are a total ofncourses you have to take, labeled from0ton - 1.Some courses may have prerequisites, for example to take course 0 you have to firs... 阅读全文

posted @ 2016-01-14 17:04 zhanghill 阅读(420) 评论(0) 推荐(0)

2016年1月11日

122. Best Time to Buy and Sell Stock II

摘要： Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complete a... 阅读全文

posted @ 2016-01-11 16:47 zhanghill 阅读(113) 评论(0) 推荐(0)

121. Best Time to Buy and Sell Stock

摘要： Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction (ie... 阅读全文

posted @ 2016-01-11 16:35 zhanghill 阅读(266) 评论(0) 推荐(0)

117. Populating Next Right Pointers in Each Node II

摘要： Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Would your previous solution stil... 阅读全文

posted @ 2016-01-11 14:14 zhanghill 阅读(136) 评论(0) 推荐(0)

116. Populating Next Right Pointers in Each Node

摘要： Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; }Populate each next pointe... 阅读全文

posted @ 2016-01-11 14:08 zhanghill 阅读(149) 评论(0) 推荐(0)

2016年1月6日

109.Convert Sorted List to Binary Search Tree

摘要：问题： Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.思路：先遍历一遍链表，将值存入一个vector中，再讲vector中有序... 阅读全文

posted @ 2016-01-06 16:13 zhanghill 阅读(275) 评论(0) 推荐(0)

2015年12月23日

35. Search Insert Position

摘要： Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in or... 阅读全文

posted @ 2015-12-23 16:53 zhanghill 阅读(122) 评论(0) 推荐(0)

2015年12月22日

31. Next Permutation（解法）

摘要： Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not possibl... 阅读全文

posted @ 2015-12-22 16:19 zhanghill 阅读(1456) 评论(0) 推荐(0)

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