The number of trees in the valley P5659
Title Description
Given a tree with a size of ∼ nn ∼ it has ∼ nn nodes and ∼ n - 1n − 1 edges. The nodes are numbered from ∼ 1 \sim n1 ∼ n. Initially, each node has a number of ∼ 1 \sim n1 ∼ n, and each number of ∼ 1 \sim n1 ∼ n only appears on exactly one node.
Next, you need to delete the edge e ...
Posted by dksmarte on Sat, 18 Dec 2021 08:57:16 +0100