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Leetcode 树 Binary Tree Zigzag Level Order Traversal
题意:给定一棵二叉树,返回按zigzag层次遍历的结果 思路: 还是跟前面的Binary Tree Level Order Traversal的思路一样 即从上往下按层遍历二叉树,将每一层的节点存放到该层对应的数组中 最后将得到的总数组中奇数层(从0层开始计数)的子数组reverse一下就可以了 复杂度:时间O(n),空间O(n)...
分类:其他好文   时间:2014-05-15 15:15:50    阅读次数:374
[LeetCode]Single Number
Given an array of integers, every element appears twice except for one. Find that single one....
分类:其他好文   时间:2014-05-15 07:20:39    阅读次数:264
LeetCode-004 Add Two Numbers
【题目】 You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4 -> 3) + (5 -> 6 -> 4) Out...
分类:其他好文   时间:2014-05-15 05:13:49    阅读次数:306
LeetCode-001 Two Sum
LeetCode-001 Two Sum Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2...
分类:其他好文   时间:2014-05-15 04:34:50    阅读次数:293
boost
std::auto_ptr 析构的时候调用 delete 操作符来自动释放所包含的对象boost::scoped_ptr / boost::scoped_array不能传递它所包含的对象的所有权 到另一个作用域指针boost::shared_ptr /boost::shared_array在内部记录...
分类:其他好文   时间:2014-05-15 02:01:07    阅读次数:353
Leetcode:Best Time to Buy and Sell Stock
Best Time to Buy and Sell Stock1Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to comp...
分类:其他好文   时间:2014-05-14 22:36:11    阅读次数:353
Leetcode 线性表 Remove Duplicates from Sorted Array II
题意:从一个已排序的数组中移除掉重复的元素,每个元素最多可重复两次 思路: 思路和Remove Duplicates from Sorted Array一样,不过要设置一个计数变量,表示当前值出现的次数 出现次数少于2可以加入到新数组,多于2则不可以。每次遇到一个新变量要把计数变量重新设置为1,加入新数组要加1 复杂度:时间O(n), 空间O(1)...
分类:其他好文   时间:2014-05-14 21:03:00    阅读次数:262
php获取服务器端mac和客户端mac的地址
获取服务器mac <?php /** 获取网卡的MAC地址原码;目前支持WIN/LINUX系统 获取机器网卡的物理(MAC)地址 **/ class GetmacAddr{ var $result = array(); // 返回带有MAC地址的字串数组 var $macAddr; /*构造*/ function __construct($...
分类:Web程序   时间:2014-05-14 20:48:33    阅读次数:387
LeetCode 007 Reverse Integer
【题目】 Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 【题意】 反转int型整数,输出的也是int型的整数 【思路】 如要考虑两种特殊情况: 1. 类似100这样的整数翻转之后为1 2. 翻转之后的值溢出该如何处理, 本题的测试用例中似乎没有给出溢出的情况 ...
分类:其他好文   时间:2014-05-14 20:41:19    阅读次数:244
Best Time to Buy and Sell Stock III
Total Accepted: 8400 Total Submissions: 38235 My Submissions Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profi...
分类:其他好文   时间:2014-05-14 19:39:53    阅读次数:275
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