简要题意: 给一n(n<=2000)个点的有标号无向图,在图上从1出发走六步回到1,问有多少种不是六元简单环的情况. 解法: 用暴力找到31种走法,环有9种形状: 分为9种,统计出每一种情况的方案数*相应形状的走法即为答案. 1.对于情况1,方案数等于边数. 2.对于情况2,$\sum{}$…

在 叶小钗 的博客中看到一段关于遍历的代码 var ajQuery = {}; function dir(elem, dir, until) { var matched = [], truncate = until !== undefined; while ((elem = elem[dir]) && elem.nodeType !== 9) { if (elem.nodeType === 1) { if (truncate) { if (elem.nodeName.toLowerCase…

Control Structures of PL/SQL Control structures are probably the most useful (and important) part of PL/pgSQL.With PL/pgSQL's control structures, you can manipulate PostgreSQL data in a very flexible and powerful way. 1.Returning From a Function RETU…

上一篇的项目只有一个单独的模板页面,加入了相应的controller,filter,使得页面上的数据能够动态的变化.现在我们开始建立并整合多个模板,加入购物车模块和结账checkout模块. 一.在页面中处理Ajax的错误 在storesSport.js中我们已经有了在申请Ajax请求错误时候的处理代码,其实在页面中也可以加入Ajax请求错误的信息,这样更容易调试,更加符合用户经验(user experience)设计原则.…

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4603    Accepted Submission(s): 1671 Problem DescriptionJimmy experiences a lot of stress at work these days, especially…

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5679    Accepted Submission(s): 2086 Problem Description Jimmy experiences a lot of stress at work these days, especiall…

A Walk Through the Forest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4383    Accepted Submission(s): 1573 Problem Description Jimmy experiences a lot of stress at work these days, especiall…

A Walk Through the Forest Time Limit:1000MS  Memory Limit:65536K Total Submit:48 Accepted:15 Description Jimmy experiences a lot of stress at work these days, especially since his accident made working difficult. To relax after a hard day, he likes t…

Walk Through Squares Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 944 Accepted Submission(s): 277 Problem Description On the beaming day of 60th anniversary of NJUST, as a military college whic…

A Walk Through the Forest Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 3   Accepted Submission(s) : 1 Problem Description Jimmy experiences a lot of stress at work these days, especially since…