2012年,美国的顶尖大学陆续设立网络学习平台,在网上提供免费课程,Coursera.Udacity.edX三大课程提供商的兴起.给很多其它学生提供了系统学习的可能.这就是大型开放式网络课程.即MOOC(massive open online courses).很多其它信息可參考百度百度http://baike.baidu.com/view/10187188.htm?from_id=8301540&type=search&fromtitle=MOOC&fr=alad…
Magic boy Bi Luo with his excited tree Problem Description Bi Luo is a magic boy, he also has a migic tree, the tree has N nodes , in each node , there is a treasure, it's value is V[i], and for each edge, there is a cost C[i], which means every time…
题目传送门:http://acm.hdu.edu.cn/showproblem.php?pid=6438 Buy and Resell Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1233 Accepted Submission(s): 407 Problem Description The Power Cube is used…