Given n arrays, find n number such that sum of their differences is minimum.
For e.g. if there are three arrays

A = {4, 10, 15, 20}
B = {1, 13, 29}
C = {5, 14, 28}

find three numbers a, b, c such that |a-b| + |b-c| + |c-a| is minimum


where a E A , bEB , cEC

. Here the answer is a = 15, b = 13, and c = 14


if we had 4 arrays we would have wanted
|a-b| + |b-c| + |c-d| +|d-a| where a E A , bEB , cEC and dED  to  be minimum
...

-- 
thanks
--mac

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