Problem:
Circle

Write a program which calculates the area and circumference of a circle for given radius r.

Input

A real number r is given.

Output

Print the area and circumference of the circle in a line. Put a single space between them. The output should not contain an absolute error greater than 10-5.

Constraints

0 < r < 10000

Sample Input 1

2

Sample Output 1

12.566371 12.566371

Sample Input 2

3

Sample Output 2

28.274334 18.849556

Solution in JAVA (judge verdict: Wrong Answer)



import java.math.BigDecimal;
import java.util.*;

public class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		
		String str;//???????????\??????
		
		double r;
		r = scan.nextDouble();
		
		//double r;
		//r = Double.parseDouble(Integer.toString(scan.nextInt()) + ".0");//??°??????????????????/0????????????
		//?????¨?????3.14
		
		//????????¢???????±???????
		//BigDecimal x = new BigDecimal(?¨???????????????\??????);
		BigDecimal x = new BigDecimal(r * r * 3.14);
		str = String.valueOf(x.setScale(5, BigDecimal.ROUND_UP)) + " ";
		
		
		
		//?????¨????????????????±???????
		BigDecimal y = new BigDecimal(2 * r * 3.14);
		str = str + String.valueOf(y.setScale(5, BigDecimal.ROUND_UP));
		
		
		System.out.println(str);
		
		
	}
}