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2021.07.06

C. Parsa's Humongous Tree #722 Div.2

u v (1 ≤ u, v ≤ n, u≠v) To make Parsa's tree look even more majestic, Nima wants to assign a number av (lv ≤ av ≤ rv) to each vertex v such that the beauty of Parsa's tree is maximized. He defines the beauty of the tree ...

2021.07.062021.07.06

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