原題:http://hoj.twbbs.org/judge/problem/view/101 AC:http://hoj.twbbs.org/judge/judge/submission/33133 我們先找出直徑上最遠的點R,將R為根作樹鍊剖分,不果剖的是最深的鏈,並將鏈縮成點權為鏈上點數的點 ...