Intro: 作为查询界的\(O(1)\)王者--前缀和的亲兄弟,差分,他可是修改界的\(O(1)\)王者 Prerequisite knowledge: 前缀和 Function: 仅单次询问的区间修改 模板题:洛谷P2367 语文成绩 先想一想朴素算法怎么做吧 对于输入的每一组\((x,y)\),遍历序列\(a_{x..y}\),每一项加上\(z\),代码如下 while(p--)for(int i(x);i<=y;++i)a[i]+=z; Time complexity: \(O(np)\…

Intro: 在OI中,前缀和是一种泛用性很高的数据结构,也是非常重要的优化思想 Function: 求静态区间和 模板题:输入序列\(a_{1..n}\),对于每一个输入的二元组\((l,r)\),求\(\sum_{i=l}^ra_i\) 先想一想朴素算法怎么做吧 对于输入的每一组\((l,r)\),遍历序列\(a_{l..r}\)求和,代码如下 int s(0); for(int i(l);i<=r;++i)s+=a[i]; return s; Time complexity: \(O(n)…

题目链接: Basic Data Structure Time Limit: 7000/3500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 207    Accepted Submission(s): 41 Problem Description Mr. Frog learned a basic data structure recently, which is called…

Basic Data Structure Time Limit: 7000/3500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Mr. Frog learned a basic data structure recently, which is called stack.There are some basic operations of stack: ∙ PUSH x: p…

Basic Data Structure Time Limit: 7000/3500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 872    Accepted Submission(s): 236 Problem Description Mr. Frog learned a basic data structure recently, which is called stac…

Basic Data Structure Time Limit: 7000/3500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 982    Accepted Submission(s): 253 Problem Description Mr. Frog learned a basic data structure recently, which is called stac…

Mr. Frog learned a basic data structure recently, which is called stack.There are some basic operations of stack: ∙∙ PUSH x: put x on the top of the stack, x must be 0 or 1. ∙∙ POP: throw the element which is on the top of the stack. Since it is too…

http://staff.city.ac.uk/~ross/papers/FingerTree.html Summary We present 2-3 finger trees, a functional representation of persistent sequences supporting access to the ends in amortized constant time, and concatenation and splitting in time logarithmi…

Data Structure? Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Data structure is one of the basic skills for Computer Science students, which is a particular way of storing and organizing data…

# 树结构 from pythonds.basic.stack import Stack #pip install pythonds from pythonds.trees.binaryTree import BinaryTree from collections import defaultdict import json #JSON-esque def tree(): return defaultdict(tree) def dicts(t): return {k: dicts(t[k])…