VHELSING - Van Helsings gun

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In Transylvania, 1753, Dracula has returned from his long sleep, now, of course, someone needs to face it or humanity will be utterly destroyed by the evil bloodthirsty Dracula.

The only one with enough courage to face Dracula is Van Helsing. The only weapon that can defeat him is the silver gun, but Van Helsing does not know the exact amount of powder required for a deadly shot.

The magazine of gunpowder has the form given by intersection of three cylinders of radius r and infinite height, mutually orthogonal, and centered on the axes $X$, $Y$ and $Z$ in $R^3$, as shown below. Your task is to help Van Helsing calculate the exact amount of gunpowder that he will need, ie, the volume of the powder magazine.


The first line of input contains an integer 1 ≤ T ≤ 100 representing the number of test cases. For each of the following
lines contain an integer 0 ≤ R ≤ 100, as shown above.


For each case print one line containing the amount of gunpowder that Van Helsing needs, with 4 decimal places.


1 Output: 0.0000

hide comments
farhan764: 2016-02-03 20:28:12

submit it in python very easy......only one math formula to finding volume of this intersection

shubham: 2015-08-19 22:45:18

use double instead of float.

ROHIT Kumar: 2015-07-26 13:10:10

read this for solving it

Dushyant Singh: 2015-06-01 16:33:33

Just used direct formula. Don't know how to derive it. :-/

HITESH GARG: 2014-12-20 22:25:57

Steinmetz solid ;)

jinkies: 2014-10-14 15:01:05

pretty easy

Samar Holkar: 2014-06-23 14:39:28

why gives wrong answer with floats????

`Ak: 2014-06-07 11:16:27

Tricylinder easy one AC! in first go :) :)

shantanu: 2014-05-18 17:03:17

okay, so i'm getting every answer correct. still NZEC here.

Shanks: 2013-12-02 18:33:40

easy math..for the precesion problem 0.4lf
will do :D

Added by:Paulo Costa
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64
Resource:IME/USP 2 - Brazilian ICPC Training Camp, Jan-Feb/2012