[HackerEarth] Water scarcity is a major problem for Graph city. Graph city has N nodes and N - 1 edges and there is a path between every pair of nodes. Now between every pair of cities that are connec - 题解

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题目信息
题号 P15946
标题 [HackerEarth] Water scarcity is a major problem for Graph city. Graph city has N nodes and N - 1 edges and there is a path between every pair of nodes. Now between every pair of cities that are connec
难度 普及-
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