#include <iostream> #include <algorithm> #include <cmath> #include <vector> #include <cstdio> #include <cstring> #pragma warning(disable:4996) using namespace std; int a[32][10001]; int n,q; int main() { int i,j,f,h,k,n…

abstract: V const & a 加速 F. Mirror 题意 链接 问题: 有n个人在y=0的平面上(及xoz平面).z=0平面上有一面镜子(边平行于坐标轴).z=a平面上有q个点(保证a大于所有人的z坐标). 所有人面朝镜子,且在镜子和q个点之间(即每个人的z坐标保证0<z<a). 问对于某个点,让所有人能够通过镜子看到那个点的镜子的最小面积. 题解 三维几何+镜像+凸包 首先考虑镜面,我们可以通过(初中科学的)镜面反射原理,关于z=0做出z=a的对称平面z=-a.问题…

Duha decided to have a trip to Singapore by plane. The airplane had nn seats numbered from 11 to nn, and nn passengers including Duha which were also counted from 11 to nn. The passenger with number ii held the ticket corresponding to the seat with n…

马年春晚上,歌手大张伟的神曲<倍儿爽>如今已传遍大街小巷.其实,不管人家到底有没有炒作,能让我们这些观众感觉到放松.乐呵,那就是一个成功的春晚节目.而今年,我也如同这歌中唱的一样,活得倍儿爽! 我是一名大三的学生,来自河南省一个小县城,父母都是普通工人,自己从小就梦想着能有机会坐飞机出去旅游一次,因为一直以来都是坐汽车.火车,一直到上了大学,我都没有坐过飞机,因此就特别梦想能有机会坐一次飞机.而在今年五一假期的时候,我这个梦想真的实现了,而且,这次坐飞机的钱都是靠我自己的努力得来的.用自己的努…

Home Web Board ProblemSet Standing Status Statistics   Problem F: 求平均年龄 Problem F: 求平均年龄 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 720  Solved: 394[Submit][Status][Web Board] Description 定义一个Persons类,用于保存若干个人的姓名(string类型)和年龄(int类型),定义其方法 void ad…

Problem F Funny Car Racing There is a funny car racing in a city with n junctions and m directed roads. The funny part is: each road is open and closed periodically. Each road is associate with two integers (a, b), that means the road will be open fo…

Problem F. Door LockTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100500/attachments Description It was a beautiful night at Yekaterinburg, the sky was crystal clear with no clouds, and the view of the moon and the stars was…

Problem F "Folding" Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100002 Description Bill is trying to compactly represent sequences of capital alphabetic characters from 'A' to 'Z' by folding repeating subsequences insid…

Problem F. Fibonacci SystemTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86821#problem/B Description Little John studies numeral systems. After learning all about fixed-base systems, he became inte…

Problem F: ExponentiationTime Limit: 1 Sec Memory Limit: 128 MBSubmit: 4 Solved: 2[Submit][Status][Web Board] [Edit] [TestData]DescriptionProblems involving the computation of exact values of very large magnitude and precision are common. For example…