Hust oj 1197 Cuts the cake（水题）

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于 2016-07-27 23:30:01 发布

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Cuts the cake

Time Limit: 1000 MS

Memory Limit: 65536 K

Total Submit: 114(57 users)

Total Accepted: 62(55 users)

Rating:

Special Judge: No

Description

Vagaa took a sliver medal in the Tianjin match. Liu sir is very very happy. So she buys a cake for them.

But there is a difficult problem.which is how to make each preson get equally many cake.Can you help her.

Input

Input contains multiple test cases. Each line is a case.　Each case contains only one integer R which is the radius. The input is terminated with a R of 0.

Output

For each test case, you should printf two numbers r2 and r1 in a line, accurate up to 3 decimal places, separate them by one space.

Sample Input

10
15
5
25
0

Sample Output

5.774 8.165
8.660 12.247
2.887 4.082

14.434 20.412

三个部分面积相等，给R求r1，r2

#include<cstdio>
#include<iostream>
#include<cmath>
using namespace std;

int main()
{
    double R;
    while(~scanf("%lf",&R) && R)
    {
        printf("%.3lf %.3lf\n",sqrt(R*R/3),sqrt(2*R*R/3));
    }
}