注册 登录  
 加关注
   显示下一条  |  关闭
温馨提示!由于新浪微博认证机制调整,您的新浪微博帐号绑定已过期,请重新绑定!立即重新绑定新浪微博》  |  关闭

长风明志的博客

不要也不能做下一个谁,应该且可以做第一个自己

 
 
 

日志

 
 

【POJ 1005】I Think I Need a Houseboat  

2013-04-01 15:58:20|  分类: ACM |  标签: |举报 |字号 订阅

  下载LOFTER 我的照片书  |
Time Limit: 1000MSMemory Limit: 10000K
Total Submissions: 76082Accepted: 32604

Description

Fred Mapper is considering purchasing some land in Louisiana to build his house on. In the process of investigating the land, he learned that the state of Louisiana is actually shrinking by 50 square miles each year, due to erosion caused by the Mississippi River. Since Fred is hoping to live in this house the rest of his life, he needs to know if his land is going to be lost to erosion. 

After doing more research, Fred has learned that the land that is being lost forms a semicircle. This semicircle is part of a circle centered at (0,0), with the line that bisects the circle being the X axis. Locations below the X axis are in the water. The semicircle has an area of 0 at the beginning of year 1. (Semicircle illustrated in the Figure.) 

【POJ 1005】I Think I Need a Houseboat - changfengmingzhi - 长风明志的博客

Input

The first line of input will be a positive integer indicating how many data sets will be included (N). Each of the next N lines will contain the X and Y Cartesian coordinates of the land Fred is considering. These will be floating point numbers measured in miles. The Y coordinate will be non-negative. (0,0) will not be given.

Output

For each data set, a single line of output should appear. This line should take the form of: “Property N: This property will begin eroding in year Z.” Where N is the data set (counting from 1), and Z is the first year (start from 1) this property will be within the semicircle AT THE END OF YEAR Z. Z must be an integer. After the last data set, this should print out “END OF OUTPUT.”

Sample Input

2
1.0 1.0
25.0 0.0

Sample Output

Property 1: This property will begin eroding in year 1.
Property 2: This property will begin eroding in year 20.
END OF OUTPUT.

Hint

1.No property will appear exactly on the semicircle boundary: it will either be inside or outside. 
2.This problem will be judged automatically. Your answer must match exactly, including the capitalization, punctuation, and white-space. This includes the periods at the ends of the lines. 
3.All locations are given in miles.


这是一道极其简单的数学题:以原点为圆心的半圆,每单位时间面积扩大50(初始半圆面积为0),现在给定点(x,y),计算多少单位时间后此点位于圆内(圆上)。
源代码:
224K  0MS

#include <iostream> #include <vector> #include <cmath> #define PI 3.1415926 using namespace std; int main() { int n; float x,y; vector<int> vecYear; float temp1,temp2; cin>>n; while(n--) { cin>>x>>y; for(int i=1;;i++) { temp1=sqrt(x*x+y*y); temp2=sqrt(100*i/PI); if(temp1<temp2) { vecYear.push_back(i); break; } } } for(int i=0;i<vecYear.size();i++) { cout<<"Property "<<i+1<<": This property will begin eroding in year "<<vecYear[i]<<"."<<endl; } cout<<"END OF OUTPUT."<<endl; return 0; }

  评论这张
 
阅读(216)| 评论(0)
推荐 转载

历史上的今天

评论

<#--最新日志,群博日志--> <#--推荐日志--> <#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇,下一篇--> <#-- 热度 --> <#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->
 
 
 
 
 
 
 
 
 
 
 
 
 
 

页脚

网易公司版权所有 ©1997-2017