More MMMM
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Silvia is taking a statistics course.  In the first week, the notions
minimum, maximum, median (the one in the middle or the average of the 
two in the middle) and medium (also known as average) are reviewed.
Since she is interested in computing, she wants to write a program 
that computes the four M's for a collection of integers.  Can you
help her?

Input
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The input consists of multiple test cases.  Each test case consists 
of one line.

Each test case starts with an integer N, where 0 < N < 10^6.  N is the 
number of integers for which we need to compute the four M's.
N is followed by N integers, where each integers is greater than or
equal to 0 and smaller than or equal to 10^15.  For these integers the
four M's need to be computed.

The input ends with a 0 (this case should not be considered).

Output
------
For each test case, the output should consist of exactly one line
containing the minimum, maximum, median and medium, seperated by
a single space.  Both the median and medium should be printed with
a single decimal.  For example, if the medium is 2.666... then 2.7 
should be printed.

Sample input
------------
1 5
3 7 1 3
2 8 2
4 1 2 3 6
0

Sample output
-------------
5 5 5.0 5.0
1 7 3.0 3.7
2 8 5.0 5.0
1 6 2.5 3.0