[HackerEarth] You are given a tree consisting of N nodes, each node i has a value a[i] (0 ≤ a[i] ≤ 1) associated with it. - 题解

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题目信息
题号 P14950
标题 [HackerEarth] You are given a tree consisting of N nodes, each node i has a value a[i] (0 ≤ a[i] ≤ 1) associated with it.
难度 提高
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