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In Android development, it is often necessary to print logs, but the system logs, first, need to write tags frequently, but tags often use the same, second, can't output the number of lines, third, the logs that may be printed are very long and can't be printed completely, so a simple log printing class is needed to write less ...

Dichotomy search thinking By maintaining the three indexes in the left, middle and right, we constantly lose half of the impossible search space, and continue to search in the other half until success The basic dichotomous template is as follows: def search(self, nums, target): left = 0 right = len(nums) ...

Directory Introduction 01. What is recursion 02. Recursive Three Conditions 03. Fibonacci series 04. Find all files in the specified directory 05.Find 1+2+...+N and 06. Find a factorial of 100 07. Combination of Ordered Numbers 08. Find a multiplier 09. Backpack problem 10. Select a team 11. Hannotta Problem 12. Dichotomy Search 13. Watch out ...

Preface: There is a Federated storage engine in MySQL. Data tables using this engine do not store any data locally, but all data are stored on remote servers. 1. See if Federated storage engine is supported MariaDB [(none)]> show engines; | FEDERATED | YES | FederatedX pluggable storage engine ...

Background introduction We inevitably write repetitive code in our work, so we need to be abstract, such as extracting common logic into abstract classes, or avoiding redundant code through some tool classes. This article today extracts a tool class from a retry function that invokes a service for reuse.For the sake of introduction, the calling ...

Find the largest square without obstacles in a square of n*n. (n < = 1000, number of obstacles < = 10000) It seems that it is a little difficult to enumerate. But if you think about it carefully, you can see that at least one side of the largest square is against the obstacle. So we just need to enumerate the largest squ ...

1. Why use thread pool? Is the more thread pools the better? Thread is an object in java, but also a resource of operating system. It takes time for thread creation and destruction. If create time + destroy time > execute task time, it is not cost-effective. Java objects occupy heap memory, and operating system threads occupy system mem ...

Bubble sort: sort arrays in ascending or descending order. Principle: (take ascending order as an example) Use double loop to compare the two adjacent numbers in the array in turn, putting the decimal first and the large number second. The first time: first, compare the first and second numbers, put the decimal number before ...

I'm very glad to be able to start learning the data structure in my spare time today. I use Mr. Deng Junhui's videos and books to teach more The function of the code is to find the largest and the next largest number in the array. In the following code, as long as max2? 3 is not called, it can run correctly [funny] #include & ...

(if you are a freshman, you should not panic and study patiently. In fact, it's not very difficult. What I regret most is that I felt it was very difficult when I was a freshman and didn't want to see it, but you should know these things sooner or later. Don't stick the code in the experiment class, and you must fight with your ...