摘要：
F - MST Query Problem Statement You are given a weighted undirected connected graph $G$ with $N$ vertices and $N-1$ edges, where vertices are numbered 阅读全文
摘要：
[USACO13DEC] Optimal Milking G 题目描述 Farmer John has recently purchased a new barn containing N milking machines (1 <= N <= 40,000), conveniently numbe 阅读全文