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Problem 11. Back and Forth Rows

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Solution 208665

Submitted on 26 Feb 2013 by Alfonso Nieto-Castanon

Size: 30
Leading solution size is 10.

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2 Comments

2 Comments

Shuang-Wei on 6 Jan 2014

brilliant!

niu on 28 Feb 2014

clever!
abs(sort(-cumprod(-ones(n)).*reshape(1:n^2,n,n)',2));
This one is more clear.what do you think?

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