Programming VIP

In c + +, cin is a big pit. Why do you say that? Let's look at the solution first. The operation of this problem on the line segment tree is very simple (if you are lazy, you don't write the detailed process...), If you don't know the line segment tree, click the link below (this is equal to this question) Important line segment tree algorithm ...

1. Design mode Preface 1.1. pattern A solution to a problem in a certain environment, including three basic elements – (problem, solution, environment). That is: under certain circumstances, use a fixed routine to solve problems. 1.2. Design pattern It is a summary of code design experience that is repeatedly used, known by most ...

c++ Learning Notes 1 I am a beginner of c++. I have made some notes for you to refer to and review. I listened to Mr. Weng Kai's class on Station B. Mr. Weng Kai's class is very good. You can listen to it if you are interested. Sometimes I compare C with c++ because I have a base in C. // #include <iostream> #include <stdlib.h> us ...

Introduction to C + + Basics 1. Initial knowledge of C + + [introduction to C + +]( (31 messages) [C + +] dark horse programmer "C + + from introduction to Mastery"_ Langli xiaofeixia blog - CSDN blog_ Dark horse programmer C++) 1.1 the first C + + program #include<iostream> using namespace std; int main() { int a =10 ...

Simple summary of select, poll and epoll 1.socket socket is used to represent the special file type of inter process communication. Its essence is the pseudo file formed by the kernel with the help of buffer. socket = IP address (uniquely identifying a host) + protocol + port number (uniquely identifying a process in a host) 2. Process of so ...

Atlantis [line segment tree + scanline + discretization] POJ1151,ACwing247 Title: Several ancient Greek books contain descriptions of the legendary island of Atlantis. Some of them even include partial maps of the island. Unfortunately, these maps describe different areas of Atlantis. Your friend Bill must know the total area of the map. ...

Here is a long table with plates and candles lined up on it. Give you a string s with subscript starting from 0 |, which contains only the characters' * 'and' | ', where' * 'represents a plate and' | 'represents a candle. At the same time, you will be given a two-dimensional integer array {queries with subscript starting from 0}, where {querie ...

1, Introduction STL algorithms are designed to handle one or more iterator intervals; In most cases, you only need to provide a starting point; STL algorithm adopts coverage mode instead of placement mode; 1.1 category 1.1.1 _if end When this kind of algorithm has two forms and the number of parameters is the same, the first f ...

string .h header file defines a variable type, a macro, several string functions and memory operation functions. Variable type size_t It is the result of the sizeof keyword. In C language, sizeof() is an operator to judge the length of data type or expression, not a function. It returns the number of memory bytes occupied by an object or ty ...

1, Question sequence: 1. Consider how to correctly search out all schemes 2. Consider pruning again 1. Optimize search order In most cases, we should give priority to searching nodes with fewer branches. 2. Eliminate equivalent redundancy For example, if the order is not considered, search by combination 3. Feasibility pruning If a scheme is i ...