G-Howe的博客

题意是找一个数做了几个数的祖先（做了多少次祖先）Write a program that takes as input a rooted tree and a list of pairs of vertices. For each pair (u,v) the program determines the closest common ancestor of u and v in the tr...

刚开始学，不知道该怎麽写，照着师哥代码敲的，当做模板吧A rooted tree is a well-known data structure in computer science and engineering. An example is shown below:In the figure, each node is labeled with an integer from {1, 2...

算法简介另一种理解方式是把T理解为一个无向无环图，而LCA(T,u,v)即u到v的最短路上深度最小的点。这里给出一个LCA的例子：对于T=<V,E>V={1,2,3,4,5}E={(1,2),(1,3),(3,4),(3,5)}则有：LCA(T,5,2)=1LCA(T,3,4)=3LCA(T,4,5)=3 算法编辑离线算法 Tarj...