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... ;-)
Back to basics 8 - Matrix Diagonals
Return a list sorted by number of consecutive occurrences
Find a Pythagorean triple
Create incremental spiral WITHOUT USING EVAL or FEVAL
Wayfinding 1 - crossing
Number of problems
Robust alignment of coordinate system
Wayfinding 2 - traversing
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