privatevoidbuildSegmentTree(int treeIndex,int l,int r){if(l>=r){tree[treeIndex]=data[l];return;}else{int leftTreeIndex=leftChild(treeIndex);int rightTreeIndex=rightChild(treeIndex);int mid=l+(r-l)/2;buildSegmentTree(leftTreeIndex,l,mid);buildSegmentTree(rightTreeIndex,mid+1,r);tree...
由于二叉树的自身特性,对于每个父亲节点的编号i,他的两个儿子的编号分别是2i和2i+1,所以我们考虑写两个O(1)的取儿子函数: 1intn;2intans[MAXN*4];34inlineintls(intp){returnp<<1;}//左儿子5inlineintrs(intp){returnp<<1|1;}//右儿子 ExtraTips 1、此处的inline可以有效防止无需入栈的信息入栈...
Segment Tree is a powerful data structure in programming, that is why it can still be optimized way more. In this blog I will explain one optimization that can make a basic segment tree slightly faster and easier to write. (idea and the code by me) This does not work on range update ...
This blog post is motivated by an interesting problem I solved today:Timus 1846. I knew about segment trees previously for solving range-minimum query, but was not fully aware of the obvious generalizations of this nice data structure. Here I will describe the basics of a segment tree and so...
self.sum_tree[index]= value#Set new valueself._propagate_index(index)#Propagate valueself.max =max(value, self.max)defappend(self, data, value): self.data[self.index]= data#Store data in underlying data structureself._update_index(self.index + self.tree_start, value)#Update treeself.ind...
In this tutorial, we have learned about the segment tree data structure. We have seen how the segment tree is built and how it is used to solve the range query problems. We have also seen the applications of the segment tree in various fields....
The data structure that is probably most used in the pattern recognition and image processing of geometric objects is the segment tree and its optimized variant, the "layered segment tree". In all the versions currently known, except the work of Vaishnavi and Wood described later, these data ...
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 ...
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 structure; that is, its content cannot be modified once the structure is built. A similar data structure is the interval 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 structure; that is, its content cannot be modified once the structure is built. A similar data structure is the interval tree....