HDU 4081 Qin Shi Huang's National Road System (次小生成树算法)
链接:http://acm.hdu.edu.cn/showproblem.php?pid=4081题目:ProblemDescriptionDuringtheWarringStatesPeriodofancientChina(476BCto221BC),thereweresevenkingdomsinChina----theywereQi,Chu,Yan,Han,Zhao,WeiandQin.Yi