可能算是道中规中矩的套路题吧…… Time limit : 2sec / Memory limit : 256MB Problem Statement You are given a tree with N vertices. The vertices are numbered 0 through N−1, and the edges are numbered 1 through N−1. Edge i connects Vertex xi and yi, and has a value ai.…
Corn Fields Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 17749 Accepted: 9342 Description Farmer John has purchased a lush new rectangular pasture composed of M by N (1 ≤ M ≤ 12; 1 ≤ N ≤ 12) square parcels. He wants to grow some yum…