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apue和unp的学习之旅10——基本udp套接字编程
使用UDP编写的一些常见的应用程序有:DNS(域名系统),NFS(网络文件系统),SNMP(简单网络管理协议)。      //---------------------------------1.recvfrom函数和sendto函数---------------------------------- #include ssize_t  recvfrom(int sockfd, voi...
分类:其他好文   时间:2014-05-10 10:14:46    阅读次数:466
HDU 1102 && POJ 2421 Constructing Roads (经典MST~Prim)
链接:http://poj.org/problem?id=2421  或   http://acm.hdu.edu.cn/showproblem.php?pid=1102 Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads ...
分类:其他好文   时间:2014-05-10 09:34:09    阅读次数:389
LeetCode OJ - Validate Binary Search Tree
验证二叉树是否是查找树,可以通过查看它的中序遍历是否是升序的。下面是AC代码: 1 /** 2 * Given a binary tree, determine if it is a valid binary search tree (BST). 3 * solution : 4...
分类:其他好文   时间:2014-05-07 09:01:45    阅读次数:250
POJ-1042 Gone Fishing (贪心法求最佳钓鱼方案
John is going on a fishing trip. He has h hours available (1 <= h <= 16), and there are n lakes in the area (2 <= n <= 25) all reachable along a single, one-way road. John starts at lake 1, but he can finish at any lake he wants. He can only travel from on...
分类:其他好文   时间:2014-05-07 08:48:52    阅读次数:515
sql语句执行顺序
一、逻辑查询处理的各个阶段 (5)SELECT DISTINCT TOP()                        (1)FROM JOIN ON   (2)WHERE (3)GROUP BY (4)HAVING (6)ORDER BY 上边语句是一个普通格式的查询语句,基本包含了所有的查询条件和关键字。你可能会发现前边的序号并不是按顺序来的,被你说对了,这...
分类:数据库   时间:2014-05-07 08:26:11    阅读次数:476
Sql_Server中如何判断表中某列是否存在
/*判断表AA中是否存在AA_ID这一列,如果不存在,则新增*/ IF NOT EXISTS (SELECT 1 FROM syscolumns INNER JOIN sysobjects ON sysobjects.id = syscolumns.id WHERE syscolumns.name = 'AA_ID' AND sysobjects.name = 'AA') ALTER TA...
分类:数据库   时间:2014-05-07 07:33:47    阅读次数:373
数字图像和视频处理的基础-第5周中值滤波PSNR练习题
In this problem you will perform median filtering to enhance the quality of a noise corrupted image. Recall from the video lecture that median filtering is effective for removing "salt-and-pepper" n...
分类:其他好文   时间:2014-05-07 07:20:09    阅读次数:326
LeetCode合集
一 线性表 1.1  数组 1.1.1 Remove Duplicates from Sorted Array 1.1.2 Remove Duplicates from Sorted Array II 1.1.3 Search in Rotated Sorted Array 1.1.4 Search in Rotated Sorted Array II 1.1.5 Median of...
分类:其他好文   时间:2014-05-07 04:24:26    阅读次数:363
codechef Popular Rice Recipe题解
Popular Rice Recipe Did you know that there are over 40,000 varieties of Rice in the world ? There are so many dishes that can be prepared with Rice too. A famous chef from Mumbai, Tid Gusto prep...
分类:其他好文   时间:2014-05-07 04:05:46    阅读次数:428
POJ3525 Most Distant Point from the Sea(半平面交)
今天打算做两道半平面交,一题卡太久了,心都碎了。。。#pragma warning(disable:4996)#include #include #include #include #include #include #include using namespace std;#define maxn...
分类:其他好文   时间:2014-05-06 12:27:57    阅读次数:389
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