Programmer Think

After a day of backtracking algorithm, now to sum up, the basic problem-solving ideas still have a certain routine. Backtracking algorithm Using the idea of trial and error, it tries to solve a problem step by step. In the process of solving the problem step by step, when it finds that the existing step-by-step answers can not get effective a ...

Counting Template: long long mul(int a,int b,int mod) { long long ans=1; while(b) { if(b&1) ans=ans*a%mod; a=a*a%mod;//Pay attention to the explosion range b>>=1; } return ans; } Fast multiplication Template: int mul(int a,int b,int mod) { int ans=0; while(b) { if( ...

Research and reproduction of time A * algorithm based on neural network prediction 1. Thesis reading and information extraction 1.1 construction of road network topology Weighted directed graph The intersection is the vertex of the graph, and the road is the edge of the graph. The topology information needs to be stored: [node type] N ...

Functions are functions, and each function is used to implement a specific function. When designing a large program, it is often divided into several program modules. Each module contains one or more functions, and each function realizes a specific function. Using function to realize modular program design is convenient for writing and compilin ...

Competition background Based on the analysis of network public opinion, the competition questions require players to conduct data analysis and visualization of brand issues according to users' comments. Through this competition question, we can guide the commonly used data visualization charts and data analysis methods to conduct exploratory d ...

The basis of data structure from the perspective of python array concept An array is an ordered set of finite variables of the same type. Sequential storage in memory can realize logical sequential table. python mainly uses lists and tuples, which are essentially the encapsulation of arrays. basic operation #Initialization list my_list = ...

Northwest University of technology NOJ-Python programming problem set: Noj Python Programming: Season 1: season 1-easy (1-10) Noj Python Programming: Season 2: Season 2 snippet (11-20) Noj Python Programming: Season 3: season 3-loop (21-30) NOJ-Python programming: Season 4: enumeration algorithm (31-40) NOJ-Python programming: Season 5: modular ...

preface Finally started the algorithm... Recursion is really abstract. Without basic principles, it is like metaphysics... #1, What problems can be solved by recursion! [Please add picture description]( https://img-blog.csdnimg.cn/ebcf0781fd71470ab1b18ce8bcf27127.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NE ...

catalogue 10 common algorithms 1. Recursive algorithm 2. Sorting algorithm 3. Binary search algorithm 4. Search algorithm 5. Hash algorithm 6. Greedy algorithm 7. Divide and conquer algorithm 8. Backtracking algorithm 9. Dynamic programming (DP) algorithm 10. String matching algorithm reference:   In the previous chapter, we talked abou ...

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