I think that with this kind of problem, you can process in two steps.
A first easy problem with small N (to test perms for example). And a harder problem with big N, which
oblige to find another algorithm.
Remove all the consonants
It dseon't mettar waht oedrr the lrettes in a wrod are.
Getting logical indexes
Vectorize the digits of an Integer
Numbers spiral diagonals (Part 1)
Return elements unique to either input
Pandigital Factors (Based on Euler 491)
Decimation - Optimized for speed
Should Mr McNugget even get out of bed today?
The Hills Are Alive...
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