Heap and heap sorting

         The previous blog post roughly described the implementation of priority queue. This one will talk about heap and heap sorting. For priority queue, please refer to the following blog post. Detailed explanation of binary heap and implementation of priority queue      &nbsp ...

Posted by jlryan on Fri, 29 Oct 2021 07:11:30 +0200

Java implementation and stability analysis of 8 common sorting algorithms

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it 1, Algorithm implementation 1. Bubble sorting 1) . compare all elements in the sequence in pairs and put the smallest one at the front; 2) . compare all elements in the remaining sequenc ...

Posted by php_blob on Fri, 29 Oct 2021 07:03:36 +0200

Figure query analysis and tuning tool Optimizer Trace

Query analysis and tuning backgroundIn the process of using the database, we often encounter the sudden slow down of SQL due to the following problems:Select wrong indexSelect the wrong connection orderRange queries use different quick optimization strategiesExecution method change of sub query selectionChange of policy mode of semi connection ...

Posted by TheMayhem on Thu, 28 Oct 2021 20:31:26 +0200

01 knapsack problem backtracking and dynamic programming solution

Problem description Description A traveler has a backpack that can hold up to m kg. There are n items. Their weights are w1,w2,w3,...,wn respectively, and their values are c1,c2,c3,...,cn respectively. If there is only one item of each kind, seek the maximum total value that the traveler can obtain. Input m. And n (m < = 200, n &lt ...

Posted by tsinka on Thu, 28 Oct 2021 16:47:20 +0200

Insect life

Total time limit:   10000ms Memory limit:   65536kB describe Dr. Hopper is studying the sexual behavior of a rare species of insects. He assumes that insects are only two sexes, and that insects interact only with the opposite sex. In his experiment, the interaction behavior of different insect individuals and insects was easy ...

Posted by anna_cm on Thu, 28 Oct 2021 10:15:31 +0200

java implementation algorithm-n

What is queen n Queen n is a classical algorithm problem, that is, an n × On the chessboard of N, a queen's chess piece is placed in each row. The vertical, horizontal and oblique rows of this chess piece have no other queen conflicts As shown in the figure thinking Let's talk about the idea first. The backtracking method is ad ...

Posted by coolex on Thu, 28 Oct 2021 04:41:55 +0200

Decision tree of machine combat

  1, Introduction 1.1 concept As shown in the figure, it is a decision tree. The square represents the decision block and the ellipse represents the terminating block, indicating that the conclusion has been reached and the operation can be terminated. The left and right arrow branch es are led out from the judgment module, which c ...

Posted by csudhoff on Wed, 27 Oct 2021 17:59:07 +0200

Data structure and algorithm-4. Matrix zeroing

4. Matrix zeroing subject Given a matrix of m x n, if an element is 0, all elements in its row and column are set to 0. Please use the in place algorithm. Advanced: An intuitive solution is to use the extra space of O (m, n), but this is not a good solution. A simple improvement is to use the additional space of O(m + n), but this is sti ...

Posted by starter911 on Tue, 26 Oct 2021 06:21:13 +0200

Algorithm: dichotomy

In the process of computer learning, algorithm is also a big head, and it is very important. Whether in academia or industry, it is very popular to have strong coding ability. As a future programmer, the algorithm must not fall behind. To this end, I specially open this column to urge myself to learn algorithms, play algorithm problems frequent ...

Posted by pikebro2002 on Sun, 24 Oct 2021 19:37:41 +0200

The last time I saw such a good ranking blog was last time

This paper will take you to understand the common sorting algorithms in the form of speaking + moving graph, briefly analyze the complexity, stability and other indicators, and give the reference code. Finally, the use of Amway sort() function. Select sort The smallest element after each selection is placed in front. Time complexity ...

Posted by knobby2k on Sun, 24 Oct 2021 17:29:01 +0200