题目链接:codeforces 1065F Up and Down the Tree 题意:给出一棵树的节点数\(n\)以及一次移动的最大距离\(k\),现在有一个标记在根节点1处,每一次可以进行一下的两个操作之一: 1.将标记移动至当前节点的子树中的某一个叶子 2.将当前标记向上移,向上移的距离不得超过\(k\) 求最多可以访问到多少个叶子结点 分析:一看就知道应该用树形dp去维护它 我们记\(dp[u]\)表示以\(u\)为根节点的子树中最多可以访问多少个叶子结点 \(dp[u]\)由两部分…

Codeforces 914H Ember and Storm's Tree Game 题目链接 ORZ佬 果然出了一套自闭题 这题让你算出第一个人有必胜策略的方案数 然后我们就发现必胜的条件就是树上的每条路径都是单调或者单峰的 所以我们考虑DP一个每条路径都是单调或单峰的树出来 所以考虑DPf[i][j]" role="presentation" style="position: relative;">f[i][j]f[i][j]表示大小是i的子树…

E. Anton and Tree 题目连接: http://codeforces.com/contest/734/problem/E Description Anton is growing a tree in his garden. In case you forgot, the tree is a connected acyclic undirected graph. There are n vertices in the tree, each of them is painted bla…

A. Link/Cut Tree 题目连接: http://www.codeforces.com/contest/614/problem/A Description Programmer Rostislav got seriously interested in the Link/Cut Tree data structure, which is based on Splay trees. Specifically, he is now studying the expose procedure…

B. Invariance of Tree Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/576/problem/B Description A tree of size n is an undirected connected graph consisting of n vertices without cycles. Consider some tree with n vertices. W…

题目链接:http://codeforces.com/contest/734/problem/E E. Anton and Tree time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Anton is growing a tree in his garden. In case you forgot, the tree is a…

题目链接:http://codeforces.com/contest/699/problem/D D. Fix a Tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A tree is an undirected connected graph without cycles. Let's consider a root…

E. Anton and Tree time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Anton is growing a tree in his garden. In case you forgot, the tree is a connected acyclic undirected graph. There are n v…

题目链接 D. Appleman and Tree time limit per test :2 seconds memory limit per test: 256 megabytes input :standard input output:standard output Appleman has a tree with n vertices. Some of the vertices (at least one) are colored black and other vertices a…

E. Ostap and Tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Ostap already settled down in Rio de Janiero suburb and started to grow a tree in his garden. Recall that a tree is a conn…