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Discretization Principle and application: When the value range of a given data is large, but the data is very scattered, the magnitude of useful data is far lower than the value range. For example, from − 1 0 9 ...

429.N-Fork Tree Hierarchical Traversal-Force Button (LeetCode) Release: September 25, 2021 01:01:25 Problem description and examples Given an N-fork tree, returns the hierarchical traversal of its node values (that is, from left to right, traverse layer by layer). The serialized input to the tree is traversed in sequence, with each set of ...

Title Link 7-11 key activities (30 points) Suppose an engineering project consists of a group of subtasks, some of which can be executed in parallel, and some must be executed after completing other subtasks. "Task scheduling" includes a group of subtasks and the subtask set on which each subtask can execute. For example, completin ...

1. Binary search algorithm (non recursive implementation) 1.1 introduction to binary search algorithm (non recursive) We have known about the binary search algorithm before, but the recursive implementation is used. Next, we understand the non recursive implementation of the binary search algorithm (note): the binary search algorithm is onl ...

Work hard and see you at the top! come on. 1, Set interface 1. Introduction to set interface Out of order (the order of addition and extraction is inconsistent) and there is no indexDuplicate elements are not allowed and contain at most one null 2. Traversal mode iterator Enhanced for loop (the underlying is also an iterator)Cannot g ...

Problem description Give you an array of n integers, nums, and a target value, target. Please find and return the quads [nums[a], nums[b], nums[c], nums[d]]: 0 <= a, b, c, d < n a. b, c and d are different from each other nums[a] + nums[b] + nums[c] + nums[d] == target You can return answers in any order. Example 1: Input: num = [1 ...

1 Preface The four algorithms are similar, and have the following similarities and differences 2 similarities and differences Take STR1 = "ABCDEF", STR2 = "zabcdze" as an example Similarities: 1. Get a target on a string; 2. The core of the algorithm is the idea of dynamic programming. difference: 1. The targets are d ...

05. Array Array is a reference type, and array data is an object After the array is created, if there is no assignment, there are default values: byte[0], short[0], int[0], long[0], float[0.0], double[0.0], char[\u0000], boolean[false], String[null] Array assignment mechanism Basic data type assignment. This value is specific data and d ...

time September 24, 2021 subject In the multi-level bidirectional linked list, in addition to the pointer to the next node and the previous node, it also has a sub linked list pointer, which may point to a separate bidirectional linked list. These sub lists may also have one or more of their own sub items, and so on to generate multi-level da ...

Direct insert sort Dynamic diagram demonstration: Basic idea: Insert the records to be sorted into an ordered sequence one by one according to the size of their key values, until all records are inserted into the sequence A new ordered sequence is obtained. Code implementation: void InsertSort(int* a, int n) { for (int i = 0; i < ...