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  1. n=gets.to_i
  2. c1=0
  3. ds=[]
  4. while c1<n
  5. 	t=gets.chomp.split(" ")
  6. 	t.each{|t2|
  7. 		ds<<t2
  8. 	}
  9. 	c1+=t.size
  10. end
  11. hs={}
  12. n.times{|i|
  13. 	t=""
  14. 	j=0
  15. 	while i+j<n && j<4
  16. 		t+=ds[i+j]
  17. 		hs[t.to_i]=1
  18. 		break if t=="0"
  19. 		j+=1
  20. 	end
  21. }
  22. ans=0
  23. m1=hs.keys.max+1
  24. while ans<=m1
  25. 	break if hs.member?(ans)==false
  26. 	ans+=1
  27. end
  28. puts ans
Success #stdin #stdout 0.01s 8064KB
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https://ideone.com/TY2gc6
language:
Ruby (ruby 2.5.5)
created:
9 days ago
visibility:
public

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