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#include<iostream> #include<cstdlib> #include<cstdio> #include<algorithm> #include<cstring> #define MAXSIZE 100 #define OK 1 #define ERROR 0 #define OVERFLOW -2 using namespace std; typedef int Status; typedef int ElemType; typedef struct{ ElemType *elem; int length; }SqList; //Linear table initialization Statu ...

1, ForewordIt refers to the division of similar data together. The specific division does not care about this kind of label. The goal is to aggregate similar data together. Clustering is an unsupervised learning method.2, General process of clusteringData preparation: feature standardization and dimensionality reductionFeature selection: select ...

LeetCode brush question array 1, Array 1.1 definition of array An array is a collection of several objects with a certain order. The objects that make up the array are called array elements. Where the vector corresponds to a one-dimensional array and the matrix corresponds to a two-dimensional array. 1.2 storage characteristics of array Ar ...

Introduction It's very difficult. I'm aware of the gap in knowledge points again Knowledge points involved Shape pressure DP, thinking, combinatorial mathematics, DSU on Tree, line segment tree Link: 2019 Nanchang Regional subject C Give a large nonnegative integer n n ...

catalogue 1. Introduction of red black tree  2. Basic properties of red black tree and definition of node 3. Rotation of red and black trees 4. Insertion of red black tree Insertion case I Insertion case II Insertion case III Insertion case IV Red black tree insertion summary: 5. Deletion of red black tree 6. Red black tree su ...

  Quantitative strategy development, high-quality community, trading idea sharing and other related contents "Know the game, break the game" Hello, I'm the Ukrainian swordsman. The last strategy of this month came. The small partners in the group mentioned whether they could write an arbitrage strategy before. OK, in this is ...

📒 Blog home page: A professional who advocates learning technology 🍣 Today's article is "game 280 of LeetCode" 🍣 🍣 I hope you can finish reading this article patiently 🍣 🙏 Bloggers are also in the learning stage. If you find any problems, please let us know. Thank you very much 🙏 💗 At the same time, thank you very much for you ...

1.ACW1097: Pond count Title:'W': Water,'.': Dry, find the number of puddles. Idea: The most basic Floodfill. The code is as follows: #include <bits/stdc++.h> #define x first #define y second using namespace std; const int N = 1010; typedef long long LL; typedef pair<LL, LL> PII; char c[N][N]; LL n,m; bool st[N][N]; int dx[8] = {-1, ...

Summary of shortest path algorithm templates In graph theory, the graph is directed and undirected, and only the algorithm of the directed graph is considered here. For undirected graphs, we see them as a special kind of directed graph, for all undirected edges u ↔ ...

Xiaobian has something to say: these topics are the understanding and application of the recursive traversal structure of binary tree, which are very classic topics. After doing a few steps, you will feel that at present, you can't run away from all the problems. Recursion is just to deal with the current node - it may be to do some oper ...