Rikka with Tree Accepts: 207 Submissions: 815 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) 问题描述 众所周知,萌萌哒六花不擅长数学,所以勇太给了她一些数学问题做练习,其中有一道是这样的: 对于一棵树TT,令F(T,i)F(T,i)为点1到点ii的最短距离(边长是1). 两棵树AA和BB是相似的当且仅当他们顶点数相同且对于任意的…
Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: For a tree T, let F(T,i) be the distance between vertice and vertice i.(The length of e…
题目链接:http://acm.split.hdu.edu.cn/showproblem.php?pid=5423 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: For a tree T, let F(T,i) be t…
http://acm.hdu.edu.cn/showproblem.php?pid=2680 Problem Description One day , Kiki wants to visit one of her friends. As she is liable to carsickness , she wants to arrive at her friend's home as soon as possible . Now give you a map of the city's tra…