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UPCOMING CHALLENGES:
CURRENT CHALLENGES:
Neon 2014
PAST CHALLENGES
Fluorum 2014
Oxygenium 2014
Nitrogenium 2013
Carbo 2013
Boron 2013
Beryllium 2013
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Helium 2013
Hydrogenium 2013
Omega 2013
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Sigma 2012
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Mu 2011
Lambda 2011
Kappa 2011
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Theta 2011
Eta 2011
Zeta 2011
Epsilon 2011
Delta 2011
Gamma 2011
December 2010
PrefixSet edition (2010-10)
Helium 2013
Start date: July 3, 2013, 6 p.m. UTC
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Find the longest border of a given string, that has three non-overlapping occurrences.
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