This should be quite straightforward but at 2a.m. my brains are not working 100%. ;)
I has exactly the same idea!!
but on the second line I used directly the logical indexing... ;-)
Project Euler: Problem 9, Pythagorean numbers
Create logical matrix with a specific row and column sums
Basic arrays operations.
Make a vector of prime numbers
Three grind is shipsstraigt
Return 'on' or 'off'
Order of things - 4
Bleed non-zeros to the right using REGEXP, and that sort of cheatcodess...
Wayfinding 1 - crossing
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