PIR  Pyramids
Recently in Farland, a country in Asia, the famous scientist Mr. Log Archeo discovered ancient pyramids. But unlike those in Egypt and Central America, they have a triangular (not rectangular) foundation. That is, they are tetrahedrons in the mathematical sense. In order to find out some important facts about the early society of the country (it is widely believed that the pyramid sizes are closely connected with Farland's ancient calendar), Mr. Archeo needs to know the volume of the pyramids. Unluckily, he has reliable data about their edge lengths only. Please, help him!
Input
t [number of tests to follow] In each of the next t lines six positive integer numbers not exceeding 1000 separated by spaces (each number is one of the edge lengths of the pyramid ABCD). The order of the edges is the following: AB, AC, AD, BC, BD, CD.
Output
For each test output a real number  the volume, printed accurate to four digits after decimal point.
Example
Input: 2 1 1 1 1 1 1 1000 1000 1000 3 4 5 Output: 0.1179 1999.9937
hide comments
davidgalehouse:
20161012 05:51:26
For C# I experienced no problems with I/O, reading ints was fine (doesn't mean you work with them as ints). 

mkfeuhrer:
20160606 13:07:36
silly CE .... easy one ,my 50th green light :) 

parth43:
20160530 11:00:24
I tried the formula square root of( 4u2v2w2 – u2(v2+w2–U2)2 – v2(w2+u2–V2)2 – w2(u2+v2–W2)2 +


Alex Anderson:
20160402 20:37:57
If you need to read as Double instead of Int to solve the problem... you are doing something wrong. Something is wrong with your input reader. I got AC 5 years ago reading int, I resubmitted same problem now, still AC. There's nothing wrong with reading Int. Only something wrong with your code that reads the int. 

dokz:
20160118 08:51:35
Read as integers > WA


Fz:
20151023 19:25:58
Useless problem. It says for input


alexbandeira:
20151010 20:33:19
warning : can and can not be blanks !


sy_117:
20150816 22:09:44
Just a formula.......for help go through the link=http://zobayer.blogspot.in/2009/11/volumeofirregulartetrahedron.html 

karthik1997:
20150707 19:54:23
thanxss @gamer496


Ankush :
20150627 13:14:25
My 100th :D 
Added by:  Adam Dzedzej 
Date:  20040514 
Time limit:  1s 
Source limit:  10000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: NODEJS PERL6 VB.NET 
Resource:  ACM ICPC 20022003 NEERC, Northern Subregion 