http://poj.org/problem?id=3013 题意: Because of a technical difficulty, price of an edge will be (sum of weights of all descendant nodes) × (unit price of the edge).这句话一直没看懂。后面还以为是最小生成树。 正确题意是
Father Christmas Retelling|Father Christmas I'm going I'm going to talk about Christmas and the question of whether he exists or not, all children would answer to this question. They a
洛谷题目链接 Atcoder题目链接 分析 发现将每个红色连通块涂成绿色连通块后,绿色连通块个数会加一,但是如果这个连通块之前已经跟绿色连通块相邻,则连通块数量减一。 代码 #include <bits/stdc++.h>#define int long longusing namespace std;const int N = 1005, mod = 998244353;int n
此处传送门 Christmas Spruce time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Consider a rooted tree. A rooted tree has one special vertex calle
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传送门:Big Christmas Tree Big Christmas Tree Time Limit: 3000MS Memory Limit: 131072KTotal Submissions: 19794 Accepted: 4248 Description Christmas is coming to KCM city. Suby the loyal civ
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