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In Java, array is a kind of reference data type. It is the simplest compound data type and a collection of ordered data. Each element in the array has the same data type. You can use a uniform array name and different subscripts to determine the unique elements in the array. According to the dimension o ...

Recently, I read the article "a dynamic clustering approach to data driven assessment personalization" on Management Science, in which I mentioned a multiarmed bandit model. I want to study it in depth, but when I check various websites, there is no introduction about this problem in Chinese, ...

CatalogData structure: Stack queue Linked list3.1 one way list3.2 two way list3.3 reversal of one-way linked listarrayDictionary implementation principle5.1 hash table5.2 hash functiontree6.1 binary tree, full binary tree, complete binary tree6.2 hash tree6.3 B-tree/B+tree Stack stackStack, also known as stack, is a linear table with limited op ...

1, Binary sort tree Definition: the value of the left subtree is less than the value of the parent node, and the value of the right subtree is greater than the value of the parent node. All nodes meet this definition. Delete: in three cases ① If the deleted node is a leaf node, you can delete it direc ...

Zzuli? OJ? 1196: counting stars (II) (special subject of structure) Knowledge point: using structure array parameter, sort function Title Description One day, Xiaoming sat in the yard and counted the stars. Gardon asked him to count the number of stars in the sky on the same straight line. There are too many stars in the sk ...

Text preprocessing Text is a kind of sequence data. An article can be regarded as a sequence of characters or words. This section will introduce common preprocessing steps of text data, which usually includes four steps: Read in text participle Build a dictionary to map each word to a unique index Co ...

The idea of this question is quite new, but it is not so disgusting compared with the realization Because it is required to move the box less, bfs can be used. Triple (x,y,dir) is used to indicate that the box is in (x,y). dir is the direction of the box where people are Because people are required to m ...

shell programming condition test Shell Conditional Judgment InitialShell branch if statementShell Loop for StatementShell branch case statementSelect List Select LoopShell loop controls continue,break,exitShell loop while statement Shell Conditional Judgment Initial [] Represents a conditional test, ...

brief introduction As a new feature of java8, lambda expression is oriented to function programming, which makes the code more concise and improves the programming efficiency. As a developer, we should not only learn to use it, but also understand the operation principle behind it lambda general use ...

Natural and customized sorting of TreeSet TreeSet is an ordered set TreeSet supports two sorting methods, natural sorting and custom sorting. The default is natural sorting TreeSet: the data structure of red black tree is used in the bottom layer. Red black tree is a specific type of binary tree, with ...