Tag：brackets
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Time：2021-12-27
leetcode 3. No duplicate longest string Title Description Given a string s, please find the length of the longest substring that does not contain duplicate characters. thinking Use MP to record the last position of the character, and use last to record the current starting position. In case of duplicate characters, calculate ANS and update […]
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Time：2021-12-26
As for the interview questions, you may not have so much time to summarize the answers. If there is anything to discuss, please give us your advice. Mainly record the preparation process and some summaries of the interview, hoping to help the students who are interviewing or will interview. one side How to implement JSON […]
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Time：2021-12-21
In the information and intelligent world, we may have heard many it terms very early. C language is also among them. We talk freely. What is C program like? Let’s start with a simple example: 1 2 3 4 5 6 7 8 9 #include/*Import header file*/ int main(void) /*A simple C program*/ { int number; /*Define a […]
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Time：2021-12-18
brief introduction Catalan number is a sequence of numbers that often appears in various counting problems in combinatorial mathematics. It is named after the Belgian mathematician OuRen Charlie Cartland (1814 – 1894). In history, Ming Antu (1692-1763), a mathematician of the Qing Dynasty, first invented this counting method in his “circle cutting density method”, which […]
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Time：2021-12-10
1. Title 1.1 English title Given a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’, determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. 1.2 Chinese […]
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Time：2021-12-9
Introduction to function macros Function macros, that is, macro definitions containing multiple statements, are usually encapsulated by statements of a frequently called function, and do not want to reduce the additional stack overhead by function encapsulation. Function macros are essentially macros and can be defined directly, for example: #define INT_SWAP(a,b) \ int tmp […]
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Time：2021-12-3
D135 20. Valid Parentheses Title Link 20. Valid Parentheses Topic analysis This question is also a classic, that is, the bracket matching question. Give a string containing small, middle and curly braces to judge whether the left and right braces match. Pay attention to the order of occurrence, not string. Also note that empty strings […]
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Time：2021-12-2
When writing a project, I encountered a scenario: I need to define several strings. I want to give them different names, but I want to process them in array order. Therefore, the code with the following structure is obtained: string inputFileName, outputFileName, QueryName, KeywordsPath, keywordDir, statisticsName, statisticsBinName; string* FilepathArr[] = { &inputFileName, &outputFileName, &QueryName, […]
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Time：2021-11-13
[No.1 check whether the string is an array prefix] Problem solving ideasCheck in question, and check whether the connection string is equal. Code display class Solution { public boolean isPrefixString(String s, String[] words) { String t = “”; for (var word : words) { t += word; if (s.equals(t)) { return true; } } return […]
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Time：2021-11-9
preg_ match_ All function: int preg_ match_ All (string pattern, string subject, array matches [, int flags]) performs a global regular expression matchSearch the subject for all the contents that match the regular expression given by pattern, and put the results into matches in the order specified by flags.After the first match is found, the […]
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Time：2021-11-5
When writing Django, I encountered many small problems that needed time to solve. Divide into several categories and add them slowly: Restart Apache:Generally, you do not need to restart to modify the template.You need to restart to modify views.py, but sometimes you can see the effect without restarting, but there will be problems when you […]
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Time：2021-10-6
Syntax: location [=|~|~*|^~] /uri/ { # … } Rules: /The beginning indicates a general match (any request will match) =The beginning indicates an exact match ^~The beginning indicates that the URI starts with a regular string (such as a URL path) ~The beginning indicates case sensitivity ~*The beginning indicates that it is not case sensitive […]
