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  1. import re
  2.  
  3. def f(x):
  4.     return ''.join(str(c) for c in range(1,x+1))
  5. print(f":::{f(13)}")
  6.  
  7. def test(s):
  8.     print("--")
  9.     for x in range(2,8):
  10.         for c in ['8','9']:
  11.             for z in re.finditer(rf"[^{c}][{c}]{{{x}}}[^{c}]",s):
  12.                 n=z.start()+1
  13.                 print(f"{c*x:>6s} at {n:<6}  [{s[n-8:n+8+x]}]")
  14.                 break
  15.             else:
  16.                 print(f"{c*x:>6s} none")
  17.  
  18. test(f(1000000))
Success #stdin #stdout 0.67s 78540KB
comments (?)
stdin
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Standard input is empty
stdout
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:::12345678910111213
--
    88 at 454     [518618718818919019]
    99 at 168     [586878889909192939]
   888 at 165     [8485868788899091929]
   999 at 2587    [6897898899900901902]
  8888 at 83330   [86188871888818889188]
  9999 at 34886   [99789988999900090019]
 88888 at 2553    [858868878888898908918]
 99999 at 438885  [978999889999900009000]
888888 none
999999 at 5288884  [7899998899999900000900]
8888888 at 34441   [88868887888888898890889]
9999999 none
https://ideone.com/g0TwVK
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
public

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