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LeetCode-Lowest Common Ancestor of a Binary Tree 深度解析
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two node...
分类:其他好文   时间:2015-08-16 19:52:31    阅读次数:105
Mac OS X安装redis-php扩展
1.获取github中的redis-php扩展代码:git clone https://github.com/phpredis/phpredis.git2.cd phpredis/ 3.phpize !!!!!!!!!!!!!!!!!!!!!!! 3.5 mac os 如果这里有Cannot find autoconf. Please check your autoconf installat...
分类:Web程序   时间:2015-08-16 19:50:50    阅读次数:150
UVA 11987 Almost Union-Find
就是比普通的并查集多了个删除操作,显然叶子节点容易删,问题在于可能删根节点。 既然叶子节点容易,我们就把所有的点都变成叶子。我是多开了n个虚拟节点。 (因为我的集合合并是直接连两个根,所以那些有效节点的父亲肯定一直是虚拟节点,所以删除的时候只要考虑一个点就行....其实我是后来才发现,这算是水过吗 QAQ)...
分类:其他好文   时间:2015-08-16 19:49:49    阅读次数:90
LeetCode解题报告--3 Sum
题目: 3 个数和问题 Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Note: Elements in a triplet (a,b...
分类:其他好文   时间:2015-08-16 18:25:29    阅读次数:173
LeetCode解题报告--3Sum Closest
题目:与3数和最接近的和 Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would...
分类:其他好文   时间:2015-08-16 18:25:25    阅读次数:126
How many prime numbers(素数)
Problem DescriptionGive you a lot of positive integers, just to find out how many prime numbers there are.InputThere are a lot of cases. In each case,...
分类:其他好文   时间:2015-08-16 16:31:59    阅读次数:101
[LeetCode] Lowest Common Ancestor of a Binary Search Tree
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to thedefinition of LCA on Wikipedia: ...
分类:其他好文   时间:2015-08-16 16:26:47    阅读次数:96
[python leetcode] Word Ladder II (very hard)[非常难,放弃]
Word Ladder II描述Given two words (start and end), and a dictionary, find all shortest transformation sequence(s) from startto end, such that:? Only one...
分类:编程语言   时间:2015-08-16 15:12:33    阅读次数:266
HDU 1598 find the most comfortable road
链接:http://acm.hdu.edu.cn/showproblem.php?pid=1598 find the most comfortable road Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5043 A...
分类:其他好文   时间:2015-08-16 13:53:31    阅读次数:121
[LeetCode] Minimum Size Subarray Sum
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...
分类:其他好文   时间:2015-08-16 12:04:38    阅读次数:80
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