// printf("%d %d %d %d\n",p,l,r,tree[id].sum[p]); } void modify(int p,int l,int r,int L,int R,int id,int x){ if(L<=l&&r<=R){ tree[id].lazy[p]^=x; tree[id].sum[p]=r-l+1-tree[id].sum[p]; return; } int mid=(l+r)>>1; pushdown(p,id,r-l+1); ...
所以可以对点权离散化,然后用线段树来维护上面需要的四个值,即可进行 dsu on tree,整体复杂度 n log n log n n \log n \log n nlognlogn。由于上面的统计我们都是进行的单向计算,所以还要对上述计算完后的答案乘以 2 2 2即可。#include <bits/stdc++.h> #define ls rt << 1 #define rs...
tree[rt] = vt[i++];//从vt里读取数据存入tree中 return; }//不是叶节点就走下面的过程 intm = (l+r)>>1; build(l,m,lson); build(m+1,r,rson); pushUp(rt);//每层递归执行到这句,rt的左右儿子肯定是存好了的 } 解释:如果是叶节点,从vt中取数存入。如果不是,分别递归地建左右子树。(...
线段树(segment tree) 线段树在一些acm题目中经常见到,这种数据结构主要应用在计算几何和地理信息系统中。下图就为一个线段树: (PS:可能你见过线段树的不同表示方式,但是都大同小异,根据自己的需要来建就行。) 1.线段树基本性质和操作 线段树是一棵二叉树,记为T(a, b),参数a,b表示区间[a,b],其中b-a称为区...
And upwards: a simple loop, we start at the bottom of the tree and go towards the top. You probably also know that the upwards implementation is about two times faster than the downwards. On top of that, it also doesn't require extending the length of the underlying vector to be a ...
typedef tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> TREE; ll a[MAXN], st[MAXN * 4], lazy[MAXN * 4]; ll F(ll a, ll b) { return a + b; } void build(ll n, ll l, ll r) { lazy[n] = 0; if (l == r) { st[n] = a[...
分段树(segment tree)是强化学习中 "优先级回放机制" 的重要组成部分。本文针对分段树(segment tree)的一个开源版本的实现来进行分析,代码地址: https://gitee.com/devilmaycry812839668/Rainbow/blob/master/memory.py Transition_dtype = np.dtype( ...
在Vue2和Element UI中实现两个树形控件(Tree)之间的跨树拖拽,主要涉及到监听拖拽事件并正确地在两个树之间移动节点。在你的代码中,你已经设置了一些基本的事件监听,但有几个地方需要调整以确保节点可以正确地从一个树移动到另一个树。 首先,我们需要确保拖拽的节点在handleDrop方法中能够正确地被添加到目标树中,并...
The segment tree is a highly versatile data structure, based upon the divide-and-conquer paradigm, which can be thought of as a tree of intervals of an underlying array, constructed so that queries on ranges of the array as well as modifications to the array's elements may be efficiently ...
expand-on-click-node="false" > <template slot-scope="{ node, data }"> <span class="custom-tree-node"> <el-input v-if="data.isEgdit" size="small" class="egditName" ref="inputVal" @...