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LeetCode: problem solving of the 160th weekly match 5238. Finding the positive integer solution of a given equation subject In this paper, we give a function f(x, y) and an objective result z. please calculate the equation f(x,y) == z all possible positive integer pairs X and y. The given function ...

Codeforces 293E Portal: https://codeforces.com/contest/293/problem/E Title: Give you a tree with an edge weight of 0 at the beginning, then give you n-1 operations, add edge weight to the edge every time, ask you how many pairs of paths between n-1 operations are less than or equal to l, and the edge weight is less than or equal to w Explanatio ...

In the project, mqtt is contacted by emqtt , when the number of messages is too large, you will be prompted Disconnected (32109) - java.io.EOFException at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:181) at java.util.concurrent.Executors$RunnableAdapter.call(Execut ...

Catalog Definition 1. Conventional method judgment 2. The most effective way to judge 3 test Definition An integer whose divisor is only 1 and itself is called a prime number, or prime number.   1. Conventional method judgment According to the definition, since prime numbers have no divisors other than 1 and itself, it is sufficient t ...

As you know, @ symbol is the syntax sugar of decorator, and the function behind @ symbol is the protagonist of our article: decorator. The decorator is placed at the beginning of a function definition, and it's like a hat on the function's head. Bind to this function. When we call this function, the first thing is not to execute this function, ...

Concurrent basis Principles of concurrent programming Atomicity Atomicity refers to that in an operation, the cpu can't pause and then schedule in the middle of the process, neither be interrupted by the operation, that is to say, one operation or multiple operations are either all executed and the execution process will not be interrupted b ...

1 Introduction In daily development, ArrayList and HashSet are very common collection classes in Java. ArrayList is the most commonly used implementation class of List interface. HashSet is the implementation that holds the unique element Set. This paper mainly makes a simple discussion on the common method contains(), mainly the performanc ...

This paper First appeared in My blog , if you think it's useful, please like the collection and let more friends see it. Recently, I developed a very simple tool, the total code is less than 200 lines. Today, briefly introduce it. What tool is this? It is a tool for visualizing Go Module dependencies. Why development Why do you want to develop ...

1. topic: The bonus paid by the enterprise is based on the profit commission. If the profit (I) is less than or equal to 100000 yuan, the bonus can be increased by 10%. If the profit is higher than RMB 100000 and lower than RMB 200000, the part lower than RMB 100000 will be charged at 10%, and the part higher than RMB 100000 will be charged a ...

-- see section 15.7 of advanced programming in unix environment for details At the end of section 15.7 of advanced programming in UNIX environment, the advantages and disadvantages of message queuing are summarized. The conclusion is that they should no longer be used in new applications. Indeed, in pursuit of efficiency, we can use shared memo ...