Poj Solution 2507

http://poj.org/problem?id=2507

//* @author: 82638882@163.com
import java.io.*;
import java.util.Arrays;
public class Main
{    
 public static void main(String[] args) throws IOException
  {
  InputStreamReader is=new InputStreamReader(System.in);
  BufferedReader in=new BufferedReader(is);
  while(in.ready())
   {
    String[] ss=in.readLine().split(" ");
    double x=Double.parseDouble(ss[0]);
    double y=Double.parseDouble(ss[1]);
    double c=Double.parseDouble(ss[2]);
    double max=Math.min(x, y),min=0;
    for(int i=0;max-min>0.00001;i++)
    {
         double mid=(min+max)/2;
     double d1=Math.sqrt(x*x-mid*mid);
     double d2=Math.sqrt(y*y-mid*mid);
     if(c*(d1+d2)==(d1*d2)){
        min=max=mid;
            break;
     }
    else if(c*(d1+d2)>(d1*d2)) max=mid;
    else min=mid;
       }
       System.out.printf("%.3fn",(min+max)/2);
    }
  }
}