Problem 865. Add more zeros

Solution 120981

Submitted on 31 Jul 2012 by Richard Zapor

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Khaled Hamed on 1 Aug 2012

The problem asks to "add" a zero, no mention of append or prepend! Nice general solution though, and a new trick learned ($&0)

Donovan Greene on 22 Jun 2017

I feel I've overcomplicated my solution
regexprep(x, '(?(?=0[^0]|0$)0|)', '00')

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