You are given a tree (a connected undirected graph without cycles) of …

layout: post title: Codeforces Round 548 (Div. 2) author: "luowentaoaa" catalog: true tags: mathjax: true - codeforces https://codeforces.com/contest/1139/my D - Steps to One 思路…

C. Edgy Trees time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a tree (a connected undirected graph without cycles) of nn vertices. Each of the n−1n−1 edges of the tree is col…

一.题面 here 二.分析 这题刚开始没读懂题意,后来明白了,原来就是一个数连通块里点数的问题.首先在建图的时候,只考虑红色路径上的点.为什么呢,因为为了不走红色的快,那么我们可以反着想只走红色的路径,这样把所有的可能数再减去只走红色路径的数就是最终的答案了.这里要注意的是,如果连通块里只有一个点,那么就是K个点都是这个点的情况,根据题意是不满足的,也要减去. 三.AC代码 #include<bits/stdc++.h> using namespace std; typedef long l…

题目链接 http://codeforces.com/contest/711/problem/C Description ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be naughty and color the trees in the park. The trees are numbered wit…

Coloring Trees Problem Description: ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be naughty and color the trees in the park. The trees are numbered with integers from 1 to n fr…

C. Coloring Trees 题目连接: http://www.codeforces.com/contest/711/problem/C Description ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be naughty and color the trees in the park. The…

C. Coloring Trees   ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be naughty and color the trees in the park. The trees are numbered with integers from 1 to n from left to right…

C. Coloring Trees time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be…

题目:https://codeforces.com/problemset/problem/711/C 题意:给你n,m,k,代表n个数的序列,有m种颜色可以涂,0代表未涂颜色,其他代表已经涂好了,连着一段是相同颜色的是一个连通块,求正好有k个连通块的最小花费 思路:首先每个位置有可能有m中颜色,而且要满足k个,我们我们可以推出所有情况 dp[n][m][k] n代表前n个数 m代表当前涂m色 k代表满足k个了 #include<cstdio> #include<cmath> #in…