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  1. import re
  2. let f=proc(s=""):bool=0>s.find re"(.)(?!\1).*\1"
  3.  
  4. const Tests = [
  5.   "3",
  6.   "51",
  7.   "44999911",
  8.   "123456789",
  9.   "222222222222222222222",
  10.  
  11.   "818",
  12.   "8884443334",
  13.   "4545",
  14.   "554553",
  15.   "1234567891",
  16. ]
  17.  
  18. for s in Tests:
  19.   echo f(s)
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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Standard input is empty
stdout
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true
true
true
true
true
false
false
false
false
false
https://ideone.com/v9qxk7
language:
Nim (nim 0.19.4)
created:
251 days ago
visibility:
secret

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