1005 I Think I Need a Houseboat

这个题目的意思是: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)。计算公式就是:

                                                        

 

代码就很简单了:

import java.util.*;
public class Main {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in);
		int countOfCase = in.nextInt();
		float x, y;
		double temp;
		for(int i = 1; i <= countOfCase; i++) {
			x = in.nextFloat();
			y = in.nextFloat();
			temp =  (x*x + y*y)*Math.PI/100;
			System.out.printf("Property %d: This property will begin eroding in year %d.\n", i, (int)temp + 1);
		}
		System.out.println("END OF OUTPUT.");
	}
}
 

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