I have got the data of  this problem !
Do you want it? Contact Me, and I will give it to you, my dear!

My Email : MartinKanglh@hotmail.com

Do Remember Me! My name is Martin.Kang

Something about this problem :
the precision of this problem is very abnormality, you must make it as 1e-8, and make the maximal answer as 1e8, then you can pass the data and get accept.

Thank You very MUCH!!! I've got AC using Your hint about maximal possible circle radius! You (reader, who hasn't AC this beautiful problem) should use the MaxRadius which equal at least 1,000,000.

Thank you for your advise. I got AC too.
btw : I used a precision of 1.0e-13 and I made the maximal radius 1.0e10(1.0e6 will get WA), so that I got AC.
Hope this helpful to others.

Anyone want data? Just Google it. But I don't think it's very nice unless you're agonized of this problem.
And I got AC without getting any test cases except the ones I made.