Problem Summary Given a tree with nodes, we need to delete exactly edges such that the number of nodes in all connected components after deletion is **at least **. The goal is to find the maximum integer that satisfies this condition. Solution Approach This problem is a typical case of “tree partitioning + binary search … Read more
Typical of Divide and Conquer Algorithm There is a pile of coins, containing one counterfeit coin. The counterfeit coin is lighter than the genuine coins. How can we quickly find the counterfeit coin using a balance? By comparing them two by two until a lighter coin is found? Divide into two piles, find the lighter … Read more
Learn alongside the Code Thinking RecordReference document link: https://programmercarl.com/0704.%E4%BA%8C%E5%88%86%E6%9F%A5%E6%89%BE.html Reference video link:https://www.bilibili.com/video/BV1fA4y1o715/vd_source=3c53b30249ab413fca24b1ab62efc8ceTraining code link (LeetCode):https://leetcode.cn/problems/binary-search/1. Binary SearchProblem:Given a sorted (ascending) array of <span>n</span> integers <span>nums</span> and a target value <span>target</span>, write a function to search for <span>target</span> in <span>nums</span>. If <span>target</span> exists, return its index; otherwise, return <span>-1</span>.There are mainly two implementations (the difference is … Read more
In the official GESP C++ Level 5 exam outline, there are a total of <span>9</span> key points. This article focuses on the analysis and introduction of the <span>6</span>th key point. (6) Master the basic principles of the binary search and binary answer algorithms (also known as binary enumeration method), and be able to quickly locate … Read more
In the programming world, the binary search algorithm has always been one of the most classic and efficient search algorithms. It can find the target element in O(log n) time complexity, making it the preferred solution for handling ordered data. However, in today’s era of big data, even O(log n) time complexity can become a … Read more
1. China Patent Publication Announcement Website: http://epub.sipo.gov.cn/ Introduction: The website includes all Chinese patent information published since September 10, 1985. Its search function allows queries based on four types of published announcement data: invention publication, invention authorization, utility model, and design. The data mainly includes Chinese patent publication announcement information, as well as substantive examination … Read more
When reading and writing files, sometimes you want to jump directly to a certain position in the file to start reading or writing. This requires first setting the file’s read/write pointer to that position before performing read or write operations. The ifstream class and fstream class have the seekg member function, which can set the … Read more
If we need to find a specific number in an array, we can use the binary search method. We can understand binary search through a number guessing game. When we are trying to find 45 in the range of 1 to 100, we guess the middle number, which is 50. We compare the guessed number … Read more
In programming, search algorithms are a crucial part. They are used to find specific elements within a dataset. In C, the two most commonly used search algorithms are linear search and binary search. This article will detail these two algorithms and provide corresponding code examples. 1. Linear Search 1.1 Overview Linear search is a simple … Read more
Search Algorithms in C: Implementation of Linear Search and Binary Search In computer science, search algorithms are used to find specific data items within data structures. In this article, we will explain two fundamental search algorithms: linear search and binary search. We will provide code examples in C, suitable for beginners to understand. 1. Linear … Read more