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  1. n=gets.to_i
  2. s=gets.chomp.split("")
  3. ans=4
  4. s.each_cons(4){|s1,s2,s3,s4|
  5.  
  6. 	t=0
  7. 	t+=1 if s1!="A"
  8. 	t+=1 if s2!="C"
  9. 	t+=1 if s3!="P"
  10. 	t+=1 if s4!="C"
  11. 	ans=[ans,t].min
  12. }
  13. puts ans
Success #stdin #stdout 0.01s 8024KB
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https://ideone.com/KqInFo
language:
Ruby (ruby 2.5.5)
created:
6 days ago
visibility:
public

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