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Catalogue Using classes to represent structured data Object as data structure Data structure TensileData class Create an instance and assign it to data Restrict attributes to specific values Simplify interfaces with constructors On demand calculation data Display TensileData object Method of drawing stress versus strain diagram Tensi ...

catalogue 1. Title Description 2. Problem solving analysis 2.1 solution 1: two dimensional matrix simulation 2.2 solution 2: directly calculate the address 3. Code implementation 1. Title Description A given string s is arranged in a Z-shape from top to bottom and from left to right according to the given number of lines numRows. For ...

1, Sort 1.1 sorting rules Sort using ORDER BY clause ASC (ascend): ascendingDESC (descend): descending order The ORDER BY clause is at the end of the SELECT statement 1.2 single column sorting Example 1: mysql> SELECT last_name, job_id, department_id, hire_date FROM employees ORDER BY hire_date; +-------------+------------+------- ...

112 path sum Given a binary tree root and a value sum, judge whether there is a path where the sum of node values from the root node to the leaf node is equal to sum. Enter a binary tree and a given integer, and output a Boolean value to indicate whether there are paths that meet the conditions. Input: root = [5,4,8,11, null, 13,4,7,2, nu ...

Chapter I basic algorithm (I) 1, Content overview Master the main ideas and have a deep understanding Understand and memorize the code template (master the idea) Template topic exercise Understanding + memory 1. Sorting: Quick rowMerge sort 2. Two points Integer dichotomyFloating point binary 2, Quick sort The main idea of ...

Title Link: https://www.nowcoder.com/study/live/716/5/17 Given a binary tree, return the sequence traversal result of the binary tree (traversing layer by layer from left to right) For example: The given binary tree is {3,9,20, #, #, 15,7}, The result of the binary tree sequence traversal is [ [3], [9,20], [15,7] ] Tips: 0 < = node numb ...

Sliding windows are divided into two types: unfixed window size and fixed window size: (commonly used when looking for substrings that meet certain requirements) 1) Unfixed window size: the window size will change. When the current window does not meet the requirements, it will move backward as a whole. 2) Fixed window size: the window size i ...

New solution of sequence query Topic background The previous question "sequence query" said: A=[A0,A1,A2 ···, An] is a sequence composed of n+1 integers in the range of [0,N], which satisfies 0 = A0 < A1 < A2 < ·· < An < n. Based on sequence a, for any integer x within the range ...

catalogue 1. Title Description 2. Problem solving analysis 3. Code implementation 1. Title Description We have n buildings, numbered from 0 to n - 1. There are several employees in each building. As it is the season to change buildings, some employees want to live in another building. Give you an array of requests, where requests[i] = [ ...

⭐ Introduction ⭐ ️ Hello, I'm Zhijie. There is only one month left for the countdown of the provincial competition of the Blue Bridge Cup. If you have practiced the real problem for nearly seven or eight years, you can obviously feel that the difficulty of the Blue Bridge Cup is becoming more and more difficult. Although it is far from being ...