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1. Overview Bob Dylan is a great American poet and songwriter. His creative works contribute a lot to American culture and even to the culture of the whole world. This paper uses NLTK to extract nouns from Bob Dylan's lyrics, stores his lyrics in a hash table for word segmentation statistics, and visualizes the lyrics with high frequency using ...

Title Link: Click to view Title Description: Maintain a collection and support the following operations: I x, insert a number {X;Q x, ask whether the number ＾ x ＾ has appeared in the set; Now you need to perform N # operations and output the corresponding results for each query operation. Input / output format: input The first line c ...

1, Forerunner 1. Knowledge to be mastered Implementation of Hash / Hash table through open address method 2. Topic information 2.1 topic source: PTA / puzzle A 2.2 Title address: 7-17 Hashing 2, Analysis of problem solving ideas 1. Understanding of the topic Insert the entered number into the Hash table and print the inserted posit ...

Title Description Given a tree, preorder and inorder are traversed sequentially. Please construct a binary tree and return its root node. Example 1 Input: preorder = [3,9,20,15,7], inorder=[9,3,15,20,7] output:[3,9,20,null,null,15,7] Example 2 Input: preorder=[-1], inorder=[-1] output: [-1] Tips ...

Guide to series of articles Guide to series of articles Open source project All articles in this series will be included in GitHub for unified collection and management. Welcome ISSUE and Star. GitHub portal: Kiner algorithm preface After understanding the underlying implementation principle of hash table, the design of hash function, the ...

subject For MOOC in Chinese Universities( http://www.icourse163.org/ )Students studying the "data structure" course who want to obtain a qualification certificate must first obtain an online programming homework score of no less than 200 points, and then obtain a total score of no less than 60 points (out of 100). The calculation for ...

438. Find all letter words in the string Meaning: Given two strings S and p, find the substrings of all ectopic words of p in s, and return the starting indexes of these substrings. The order in which answers are output is not considered. Ectopic words refer to strings with the same letters but arranged differently. Example 1: input: ...

This is [031, the least cache used recently] on LeetCode, and the difficulty is [medium] subject Using the mastered data structure, design and implement an LRU (Least Recently Used) cache mechanism. Implement LRUCache class: LRUCache(int capacity) initializes the LRU cache with a positive integer as capacityint get(int key) if the keyword k ...

subject This is [034, modified phrase] on LeetCode. The difficulty is [simple] Some alien languages also use English lowercase letters, but the order may be different. The order of the alphabet is the arrangement of lowercase letters. Given a set of words written in an alien language and the order of its alphabet, it returns true only wh ...

Design hash set of leetcode daily question Title Link: https://leetcode-cn.com/problems/design-hashset/ Topic Description: design a hash set without using any built-in hash table library. Implement the MyHashSet class: void add(key) inserts the value key into the hash set. bool contains(key) Returns whether the value key exists in the hash ...