[AtCoder] Given is a tree T with N vertices. The i-th edge connects Vertex A_i and B_i (1 \leq A_i,B_i \leq N). - 题解

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题目信息
题号 P19510
标题 [AtCoder] Given is a tree T with N vertices. The i-th edge connects Vertex A_i and B_i (1 \leq A_i,B_i \leq N).
难度 提高-
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