博客
关于我
HDU 3007 Buried memory
阅读量:173 次
发布时间:2019-02-27

本文共 3527 字,大约阅读时间需要 11 分钟。

Buried memory

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)

Total Submission(s): 261    Accepted Submission(s): 139

Problem Description
Each person had do something foolish along with his or her growth.But,when he or she did this that time,they could not predict that this thing is a mistake and they will want this thing would rather not happened.
The world king Sconbin is not the exception.One day,Sconbin was sleeping,then swakened by one nightmare.It turned out that his love letters to Dufein were made public in his dream.These foolish letters might ruin his throne.Sconbin decided to destroy the letters by the military exercises's opportunity.The missile is the best weapon.Considered the execution of the missile,Sconbin chose to use one missile with the minimum destruction.
Sconbin had writen N letters to Dufein, she buried these letters on different places.Sconbin got the places by difficult,he wants to know where is the best place launch the missile,and the smallest radius of the burst area. Let's help Sconbin to get the award.
 

 

Input
There are many test cases.Each case consists of a positive integer N(N<500,^V^,our great king might be a considerate lover) on a line followed by N lines giving the coordinates of N letters.Each coordinates have two numbers,x coordinate and y coordinate.N=0 is the end of the input file.
 

 

Output
For each case,there should be a single line in the output,containing three numbers,the first and second are x and y coordinates of the missile to launch,the third is the smallest radius the missile need to destroy all N letters.All output numbers are rounded to the second digit after the decimal point.
 

 

Sample Input
31.00 1.002.00 2.003.00 3.000
 

 

Sample Output
2.00 2.00 1.41
 

 

Source
解题:
     
1.我们先照第一图画出两个圆,画完可知其余的点一定在两圆相交的椭圆里,因为距离就红线最长了,但是范围还是太大了;
2.再照第二个图画出第三个圆,我们可知,
   最完美的情况下,最长的线段即是要求的圆的直径,可以包含了所有的其余点,那么这些点就在红色的圆里面;
   非完美情况下,即有几个点在红圆的外面(不超出椭圆),那么红圆圆心到那些点最长的,定是所要求的圆的半径。画出第三个图。
(经
提醒,少考虑了等边三角形情况,现补充如下)
3.若是等边三角形,则圆心为等边三角形外心
本来都做对了,奈何一个函数名与系统的库函数冲突了,就是distance函数,CE了3次。
你可能感兴趣的文章
mysql 用户管理和权限设置
查看>>
MySQL 的 varchar 水真的太深了!
查看>>
mysql 的GROUP_CONCAT函数的使用(group_by 如何显示分组之前的数据)
查看>>
MySQL 的instr函数
查看>>
MySQL 的mysql_secure_installation安全脚本执行过程介绍
查看>>
MySQL 的Rename Table语句
查看>>
MySQL 的全局锁、表锁和行锁
查看>>
mysql 的存储引擎介绍
查看>>
MySQL 的存储引擎有哪些?为什么常用InnoDB?
查看>>
Mysql 知识回顾总结-索引
查看>>
Mysql 笔记
查看>>
MySQL 精选 60 道面试题(含答案)
查看>>
mysql 索引
查看>>
MySQL 索引失效的 15 种场景!
查看>>
MySQL 索引深入解析及优化策略
查看>>
MySQL 索引的面试题总结
查看>>
mysql 索引类型以及创建
查看>>
MySQL 索引连环问题,你能答对几个?
查看>>
Mysql 索引问题集锦
查看>>
Mysql 纵表转换为横表
查看>>