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In the time domain, the method to describe the characteristics of the system is the difference equation and the unit impulse response. In the frequency domain, the method of describing the characteristics of the system can be the system function Linear time invariant property of system, causality, stability Stability is that the system can obta ...

You can add wechat: sxxzs3998 (note CSDN) if you want to join the interview question brushing group of large factories 1. Title If the characters of two strings are the same but the order is different, they are considered brother strings. Ask how to quickly match brother strings (for example, bad and adb are brother strings) 2. Analysis 2.1 ...

Title Link https://leetcode-cn.com/problems/valid-anagram/ Source code github address https://github.com/YIMEng-0/DataStructure 1. Title Requirements Given two strings s and t, write a function to determine whether t is an alphabetic ectopic word of s. Concept of acronym: Note: if each character in S and t occurs the same nu ...

Two dimensional array transformation Remodeling matrix Topic introduction Train of thought analysis This question can be written according to the meaning of the question, but before traversing the two-dimensional array, judge whether the given r and c are reasonable in advance. If not, just return directly.When the product of r and ...

Basic concepts Edit distance issue: It is difficult to edit the distance problem, but the solution is very beautiful, and it is also a rare practical algorithmEdit the distance usage scenario: For revising the misplaced content of the article The article can only be modified by 20 words, and supports adding, deleting and replacing oper ...

physical exercise Time limit: up to 40 use cases, 1.5 seconds (C/C + +), 2 seconds (Java) / memory limit: 256 MB (Stack 1 MB) A new kind of fitness equipment has been introduced into the gym that zhe min often goes to. The equipment is in the form of two columns erected. There are N+1 handles on each column, and each handle is pasted with numbe ...

preface Blue Bridge Cup Official Website: Blue Bridge Cup - National College Students TMT industry competition ✨ This blog explains the algorithm knowledge involved in the Blue Bridge Cup C/C + + preparation. This blog is the second lecture: recursion [exercise] See blog for details of [example] of recursion: Lecture 2 of Blue Bridge Cup ...

Select Sorting Algorithm In order to sort the sequences with less data in ascending or descending order, we can consider using the selective sorting algorithm, whose corresponding time complexity is O(n2). The idea of sorting the sequence containing n elements by sorting algorithm is to find the maximum or minimum value from the sequence to b ...

Problem Description: 1 Band fraction 100 can be expressed as a fractional form: 100 = 3 + 69258 / 714. It can also be expressed as: 100 = 82 + 3546 / 197. Note: in the band fraction, the numbers 1 ~ 9 appear respectively and only once (excluding 0). Like this band fraction, 100 has 11 representations. Solution: #include<iostream> #inc ...

preface This article will not elaborate too much on the principle of HashSet, but only on some views of HashSet based on bottom + specific. I would like to point out some mistakes. Thank you HashSet features Element uniqueness: because HashSet is implemented based on HashMap, the elements in HashSet are stored on the key of HashMap, and the ...