C++

The content is not complete and will be added later.C # links to SQL.1. Link string configuration information is saved in app. Config 2. Add System.Configuration Reference3. Get the link string in DBHelper/* * Get Connection Database String *

Topic:Given n, generate all structurally unique BST 's (binary search trees) that store values 1 ... n.For example,Given N = 3, your program should return all 5 unique BST ' s shown below. 1 3 3 2 1 \// /\ 3

Method 1: Recursive method:(1) If two nodes are in the Saozi right subtree of the root node, the root node is returned(2) If all two nodes are in the left subtree, the left subtree is processed recursively, and if two nodes are in the right subtree,

JSON (JavaScript Object Notation) is a lightweight data interchange format, similar to XML, this article mainly on the use of Jsoncpp parsing JSON VS2008 the way to do a record.Jsoncpp is a cross-platform open Source Library:

Public classcdisposable:idisposable {//destructor , which becomes protected void Finalize () after compilation, the GC will call the method before it reclaims the object~cdisposable () {Dispose (false); } //by implementing this

Direct code:1 Publicdictionarystring,string> Mergedictionary (dictionarystring,string> First, dictionarystring,string>second)2 {3 if(First = =NULL) First =Newdictionarystring,string>();4 if(Second =

// /// Get text box control// /// Text Box parent window // text box text, NULL to search all /// Parent window on the first few text boxes /// text box handle Private IntPtr Gettextedit (IntPtr hwnd,string text, int ilevel){IntPtr ieditor =

This article describes the application of partial classes and partial methods in C #. Need a friend to reference under Partial classes (partial class) are introduced in c#2.0, and partial methods (partial method) are introduced in c#3.0, both of

Des tool Classes:/// /// . NET Cryptographic decryption helper class/// Public classnetcryptohelper{/// ///des default key vector/// Public Static byte[] Desiv = {0x12,0x34,0x56,0x78,0x90,0xAB,0xCD,0xEF }; /// ///des plus decryption

The structure stored in MongoDB is as follows:public class Questioninfo{public int _id {get; set;}//Question IDPublic list samequestions {get; set;}//A set of questions similar to the participle of the topicPublic list samebody {get; set;}//Set of

First, write in frontVideo on demand, is a once very hot, is still very hot today, a video service technology. I recently committed to research the application of various video formats in the VOD system, has now studied the successful FLV, f4v, MP4,

The code snippet is as follows:Char0x01; // Local Zone { char status; 0x00 ;} printf ("status =%d\n", status);AnalysisIf a global variable A is defined and a is defined once in the local area, then after the local region has been modified to

The first chapter: lexical trapsThe compiler is responsible for decomposing the program into a part of a symbol, commonly referred to as the "lexical analyzer." For example, for statements:if (x = = big) Big = x;Its first symbol is the C keyword if,

idea: Similar to a topological sorting problem, according to the degree of 1 points, it is connected to the number of edges is different or and this rule, directly to the topological sort. Each time the resulting node is reduced by one, and xor the

codeforces Round #285 Div1 A and Div2 Cproblemgive a figure g, make sure G is a forest (pit!) ）。 Figure G contains n points, giving two attributes for each point: degrees (degree), XOR, and (sum). The degree indicates how many points the point is

Search Insert Position -- leetcode Given a sorted array and a target value, return the index if the target is found. If not, return the index where it wocould be if it were inserted in order. You may assume no duplicates in the array. Here are

POJ 3687-Labeling bils (reverse topological sorting) Labeling bils Time Limit:1000 MS Memory Limit:65536 K Total Submissions:11256 Accepted:3230 Description Windy hasNBils of distinct weights from 1

ZOJ Monthly, January 2015 (B, E, G, H) Question B: First, the existing card is processed, and then the dfs is run. The dfs has a large pruning function, that is, if the current position is smaller than the Lexicographic Order, you do not need to

Search for a Range -- leetcode Given a sorted array of integers, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in the orderO(LogN). If the target is not found in the array, return[-1, -1].

LeetCode-Compare Version Numbers Compare two version numbers version1 and version1.If version1> version2 return 1, if version1 You may assume that the version strings are non-empty and contain only digits and.Character.The.Character does not