Given a matrix, return the sum of all the elements across the diagonals.
E.g. A = [1 2 3; 4 5 6; 7 8 9;]
then, sum = 25 as sum of (1, 3, 7, 9,5)
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Jon
on 31 May 2014
Basically the same as Problem 1158
Jong-Min Kwak
on 4 Dec 2016
good!!
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1 player likes this solution
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Jean-Marie Sainthillier
on 9 Feb 2014
First time I see this notation.
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