2019-2020 ICPC Asia Hong Kong Regional Contest
C. Constructing Ranches 题意： 一棵树上每个节点有权值\(a_i\)，问你有多少路径满足以下条件：路径经过的每个点权作为边长，可以构成一个多边形。 解法： 三条边能构成 ...
原文：2019-2020 ICPC Asia Hong Kong Regional Contest
题解： https: files.cnblogs.com files clrs HKEditorial V .zip Code： Part A. Axis of Symmetry include lt cstdio gt include lt algorithm gt include lt vector gt using namespace std typedef long long ll con ...
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