Problem 题目概要:给定一棵 \(n\) 个节点的树,点有点权,进行 \(m\) 次路径取\(\max\)的操作,最后统一输出点权 \(n\leq 10^5,m\leq 5\times 10^6\) Thoughts 今天闲来无事想到的题目,然后就出出来了 我的做法复杂度是\(O(n\log n+m)\),想把\(O(m\log m)\)卡掉,于是一开始把 \(m\) 开到了\(10^7\),后来发现由于常数过大,导致需要跑\(7s\) 虽然其他做法都跑不出来,然后就把数据开小到\(5\t…

picks loves segment tree I 题目背景 来源: \(\text {2018 WC Segment Tree Beats}\) 原作者: \(\text {C_SUNSHINE}\) \(\text {jiry_2}\) 题目描述: 给定一个长度为\(n\)的数列\(A\),接下来有\(m\)次操作: 区间\([l,r]\)中的所有数变成\(min(A_i,x)\) 询问区间\([l,r]\)中所有数的和 \(n,m \le 50000\) 我会分块! \(n,m \le…

传送门 线段树好题. 维护区间取两种最值,区间加,求区间两种历史最值,区间最小值. 自己的写法调了一个晚上+一个上午+一个下午+一个晚上并没有调出来,90" role="presentation" style="position: relative;">9090分弃疗. 于是我开始学习新的写法. 也就是封装再封装. 然后发现自己的方法的确有不严谨的地方,但并不好改,于是写了一个凌晨参考了xuyixuan" role="presen…

[题目描述] For an array, we can build a Segment Tree for it, each node stores an extra attribute count to denote the number of elements in the the array which value is between interval start and end. (The array may not fully filled by elements) Design a…

Do use segment tree Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://www.bnuoj.com/v3/problem_show.php?pid=39566 Description Given a tree with n (1 ≤ n ≤ 200,000) nodes and a list of q (1 ≤ q ≤ 100,000) queries, process the queries in order and out…

Revenge of Segment Tree                                                          Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)                                                                                    To…

Revenge of Segment Tree Problem Description In computer science, a segment tree is a tree data structure for storing intervals, or segments. It allows querying which of the stored segments contain a given point. It is, in principle, a static structur…

The structure of Segment Tree is a binary tree which each node has two attributes startand end denote an segment / interval. start and end are both integers, they should be assigned in following rules: The root's start and end is given bybuild method…

The structure of Segment Tree is a binary tree which each node has two attributes start and end denote an segment / interval. start and end are both integers, they should be assigned in following rules: The root's start and end is given by build meth…

For a Maximum Segment Tree, which each node has an extra value max to store the maximum value in this node's interval. Implement a modify function with three parameterroot, index and value to change the node's value with[start, end] = [index, index] …