D. Volatile Kite time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a convex polygon P with n distinct vertices p1, p2, ..., pn. Vertex pi has coordinates (xi, yi) in the 2D pla…

#include <cstdio> #include <iostream> #include <cstring> #include <queue> #include <vector> using namespace std; #define INF 0x7fffffff struct edge { int t; long long d; }; vector<edge> g[20005]; int n, m, p, q; void Sp…

Deleting Edges                                                                                  Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)                                                                    …

ubuntu安装好之后,默认是不能用root用户登录桌面的,只能使用普通用户或者访客登录.怎样开启root用户登录桌面呢? 先用普通用户登录,然后切换到root用户,然后执行如下命令: vi /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf 在打开的文件里添加一句: greeter-show-manual-login=true 这句的意思是在登录时允许用户自己输入用户名和密码. 然后给root用户设置登录密码,设置方式见ubuntu首次给root用…

To and Fro Time Limit: 2 Seconds      Memory Limit: 65536 KB Mo and Larry have devised a way of encrypting messages. They first decide secretly on the number of columns and write the message (letters only) down the columns, padding with extra random…

Automatic Judge Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 16    Accepted Submission(s): 11 Problem Description Welcome to HDU to take part in the second CCPC girls' competition! A new a…

const是C语言的关键字,经C++进行扩充,变得功能强大,用法复杂.const用于定义一个常变量(只读变量),当const与指针,引用,函数等结合起来使用时,情况会变得复杂的多.下面将从五个方面总结const的用法. 1.const位置 const位置较为灵活,一般来说,除了修饰一个类的成员函数外,const不会出现先一条语句的最后.示例如下: #include <iostream> using namespace std; int main(int argc,char* argv[]) {…

Lunch Time Time Limit: 2 Seconds Memory Limit: 65536 KB The 999th Zhejiang Provincial Collegiate Programming Contest will be held in Marjar University. The canteen of Marjar University is making preparations for this grand competition. The canteen pr…

A. Fake NP time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.…

动态链接库:我们经常把常用的代码制作成一个可执行模块供其他可执行文件调用,这样的模块称为链接库,分为动态链接库和静态链接库. 对于静态链接库,LIB包含具体实现代码且会被包含进EXE中,导致文件过大,浪费磁盘和内存: 对于动态链接库,DLL不必被包含在最终的EXE中,EXE执行时可以动态地装载和卸载DLL文件. 导出函数 将函数声明为导出函数有两种方式: 1. 在函数声明上加上_declspec(dllexport): 如:extern "C" int__declspec(dllexp…