add artigo knn

Signed-off-by: Alexandre Peres Arias <apa13@inf.ufpr.br>
1 job for master in 16 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
failed tests #3273
ubuntu

00:00:16

 
Name Stage Failure
failed
tests Test There is an unknown failure, please try again
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