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广度优先搜索 - BFS(2) 数论 - 素数(3) 未归档(1) 深度优先搜索 - DFS(1)

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[CF739B] Alyona and a tree 详解

B. Alyona and a tree Alyona has a tree with n vertices. The root of the tree is the vertex 1. In each vertex Alyona wrote an positive integer, in the ...

2019-03-12

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