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  1. cur = 0
  2. res = 0
  3. i = 0
  4. seq = 'XYZ'
  5.  
  6. for ch in input():
  7.   if ch == seq[i]:
  8.     cur = cur + 1
  9.     i = (i + 1) % len(seq)
  10.   else:
  11.     res = max(res, cur)
  12.     cur = +(ch == seq[0])
  13.     i = cur
  14.  
  15. res = max(res, cur)
  16.  
  17. print(res)
Success #stdin #stdout 0.02s 9096KB
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stdin 
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stdout 
2
https://ideone.com/gqRcsl
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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