in reply to Pure regex Hamiltonian Circuit solution
Nice. You beat me to it. I was already pretty sure earlier
this week that Hamiltonian Circuits/Paths could be done with
pure regexes as well, and just tonight I was making some notes
on how to do it. It basically came down to the same principles
you are using - although I was thinking of mixing the picking
of the vertices with the testing for unique picks and valid paths (just to gain speed by rejecting earlier).
Abigail
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