树链剖分【CF165D】Beard Graph】的更多相关文章

题面 题解 乍一看,单点修改,单链查询,用树链剖分维护每条链上白边的数量就完了, 还是--得写树链剖分吗?--3e5,乘两个log会T吗-- (双手颤抖) (纠结) 不!绝不写树链剖分! 这题如果能维护每个点到根节点路径上的白边数量,就可以用lca直接算,怎么维护呢 把点按dfs序排序,每个点存它到根节点路径上白边数量,当边的颜色变化时,就把以该边下端点为根的子树内的值整体加一或减一,也就是在按dfs序排序后的序列上做区间修改,然后单点查询 把单点修改.区间查询变成区间修改.单点查询了耶! 然后…
题目描述 如题,已知一棵包含N个结点的树(连通且无环),每个节点上包含一个数值,需要支持以下操作: 操作1: 格式: 1 x y z 表示将树从x到y结点最短路径上所有节点的值都加上z 操作2: 格式: 2 x y 表示求树从x到y结点最短路径上所有节点的值之和 操作3: 格式: 3 x z 表示将以x为根节点的子树内所有节点值都加上z 操作4: 格式: 4 x 表示求以x为根节点的子树内所有节点值之和 输入输出格式 输入格式: 第一行包含4个正整数N.M.R.P,分别表示树的结点个数.操作个数…
D. Happy Tree Party     Bogdan has a birthday today and mom gave him a tree consisting of n vertecies. For every edge of the tree i, some number xi was written on it. In case you forget, a tree is a connected non-directed graph without cycles. After…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4897 Problem Description There is an old country and the king fell in love with a devil. The devil always asks the king to do some crazy things. Although the king used to be wise and beloved by his peopl…
You are given a tree (an acyclic undirected connected graph) with N nodes, and edges numbered 1, 2, 3...N-1. We will ask you to perfrom some instructions of the following form: CHANGE i ti : change the cost of the i-th edge to tior QUERY a b : ask fo…
  Query on a tree Time Limit: 851MS   Memory Limit: 1572864KB   64bit IO Format: %lld & %llu Submit Status Description You are given a tree (an acyclic undirected connected graph) with N nodes, and edges numbered 1, 2, 3...N-1. We will ask you to per…
D. Happy Tree Party Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/593/problem/D Description Bogdan has a birthday today and mom gave him a tree consisting of n vertecies. For every edge of the tree i, some number xi was w…
3637: Query on a tree VI Time Limit: 8 Sec  Memory Limit: 1024 MBSubmit: 206  Solved: 38[Submit][Status][Discuss] Description You are given a tree (an acyclic undirected connected graph) with n nodes. The tree nodes are numbered from 1 to n. Each nod…
Stability Time Limit: 3000/2000 MS (Java/Others)    Memory Limit: 65535/102400 K (Java/Others)Total Submission(s): 1347    Accepted Submission(s): 319 Problem Description Given an undirected connected graph G with n nodes and m edges, with possibly r…
Little Devil I Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 894    Accepted Submission(s): 296 Problem Description There is an old country and the king fell in love with a devil. The devil…