[AtCoder] We have a tree with N vertices and N-1 edges, respectively numbered 1, 2,\cdots, N and 1, 2, \cdots, N-1. Edge i connects Vertex u_i and v_i. - 题解

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题目信息
题号 P14908
标题 [AtCoder] We have a tree with N vertices and N-1 edges, respectively numbered 1, 2,\cdots, N and 1, 2, \cdots, N-1. Edge i connects Vertex u_i and v_i.
难度 提高-
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