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Problem 1877. Friday the 13th

Created by Kevin Hellemans

According to superstition, lots of unpleasant stuff happens on Friday the 13th, so you might like to find the next occurence of such a date. Given a date string ('dd/mm/yyyy'), return the next occurence of a Friday the 13th. If the date string is already a Friday the 13th, return the original string. Output should be in the form of a date string ('dd/mm/yyyy').

Example: date = '13/09/2013', nextfri13(date) = '13/09'2013'; date = '15/12/2013', nextfri13(date) = '13/06/2014';

And so on. Good luck!

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17 correct solutions 14 incorrect solutions
Last solution submitted on Aug 07, 2014

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