pku1005

//http://acm.pku.edu.cn/JudgeOnline/

java 代码

//http://acm.pku.edu.cn/JudgeOnline/
package com.pku;
import java.io.*;
import java.util.*;
import java.lang.Math;

public class Pku1005 {

        /**
         * @param args
         */
        double semisquare(double x, double y)
        {
            double length = Math.sqrt(x*x + y*y);
            return Math.PI * length *length/2;
        }
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            Scanner cin = new Scanner(new BufferedInputStream(System.in));
            Pku1005 pku1005 = new Pku1005();
            int n = cin.nextInt();
            double x = 0, y = 0;
            double square = 0.0;
            double temp = 0.0;
            int i = 1;
            while(i <= n)
            {
                x = cin.nextDouble();
                y = cin.nextDouble();
                square = pku1005.semisquare(x, y);
                System.out.println("Property "+ i +": This property will begin eroding in year "+ (int)(square/50+1) +".");
                i++;
            }
            System.out.println("END OF OUTPUT.");
        }

}