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  1. gets
  2. ans="No"
  3. ns=gets.split(" ").map{|e| e.to_i}
  4. cs=[0]*200010
  5. ns.each{|e|
  6. 	cs[e]=1
  7. }
  8. 0.upto(200000){|i|
  9. 	ans="Yes" if cs[i]+cs[i+3]+cs[i+6]==3
  10. }
  11. puts ans
Success #stdin #stdout 0.04s 9768KB
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stdin
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8
9 8 11 1 1 6 10 4
stdout
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No
https://ideone.com/1bNrgK
language:
Ruby (ruby 2.5.5)
created:
9 days ago
visibility:
public

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