Cuts the cake

Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)

Problem Description

Ice cream took a bronze medal in the Beijing match. Liu sir is very very happy. So he buys a cake for them. kiki is a child who likes eating, so the task of cuting cake  was given to kiki. kiki is also a mischievous child. She
wants to cut the cake in a different way. This is introduced in the figure below.

But there is a difficult problem.which is how to  make each preson get equally many cake. kiki is not good at match, so she wants you help her solve this problem.

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

Author

☆RPG♀月野兔☆

Source

HDU 2007-11  Programming Contest_WarmUp

Recommend

威士忌

题意，给你大R的长度，让你求两个小r多长。水题，用大R求出总面积。面积分成三份，r1对应的占三分之二。r2占三分之一。然后算出即可。

超级水。

#include <stdio.h>
#define PI 3.1415926
#include<math.h>
int main()
{
	double a,r1,r2;
	while(scanf("%lf",&a)&&a)
	{
		double s=a*a*PI;
		double r1=sqrt(2.0/3.0*s/PI);
		double r2=sqrt(s/3.0/PI);
		printf("%.3lf %.3lf\n",r2,r1);
	}
	return 0;
}