RROOT  REAL ROOTS
Anurag is not so good at probability, In fact he tends to avoid any probability questions. Bhavik being his friend knows this and also knows that Anurag is excellent with quadratic equations.
In order to help he gives Anurag a quadratic equation of the form x^2+2*b*x+c=0 and asks him to find the probability that the given equation has real roots.
To make this question nontrivial he gives Anurag, side of the square centered at origin assuming values of b and c will not go outside that square given.
Help Anurag to find the probability?
Input
First line contains a number of test cases T(<25).Next T lines contain the side of the square S(<=1000000).
Output
Output the required probability in new line for each case up to 6 decimal places.
Example
Input: 1 8 Output: 0.833333
hide comments
sherlock11:
20180202 08:14:53
just calculate the area of parabola enclosed by upper side of square


cs_abhi2000:
20170110 11:38:37
Maths Rocx... :) 

(Tjandra Satria Gunawan)(æ›¾æ¯…æ˜†):
20160918 08:50:17
seems that S is larger than or equal 1.99503924751586370079001 in test data


arun_1997:
20151211 19:31:34
simple derivation.... 

thedictator:
20151211 10:04:20
Simple maths problem... :) 

sy_117:
20150830 20:16:51
nice ques. mutliple concepts.....Nd with this completed my 50th on Spoj :P 

RADHE SHYAM LODHI:
20150827 19:45:08
75th ! :D 

shantanu tripathi:
20150822 09:58:04
nice ... @shivam singh ..no spoiler plzzz 

Shivam Singh:
20150821 00:22:29
for those of you who are stuck...


mallu66:
20150818 16:34:57
b and c are only integers?

Added by:  Bhavik 
Date:  20140126 
Time limit:  0.300s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ASM64 