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/1?$|(11+?)\1+$/
That’s tricky! Neat though!
Clever! Inefficient (since it’s essentially a brute force), but very clever and probably worth a code golf award.
/1?$|(11+?)\1+$/
That’s tricky! Neat though!
Clever! Inefficient (since it’s essentially a brute force), but very clever and probably worth a code golf award.
