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  1. import itertools
  2.  
  3. def count_plus_minusminus(s):
  4. 	c = 0
  5. 	best = 0;
  6. 	for ch, g in itertools.groupby(s):
  7. 		count = sum(1 for _ in g)
  8. 		if ch == '-':
  9. 			c = c + count // 2
  10. 			if count % 2 == 1:
  11. 				best = max(best, c)
  12. 				c = count // 2
  13. 		elif ch == '+':
  14. 			c = c + count
  15. 	return max(best, c)
  16.  
  17.  
  18. for t in ["-+--+", "--+---+-", "++-+--+----+-+", "+--+++-------+-+++-+"]:
  19. 	print(f"{t} = {count_plus_minusminus(t)}")
  20.  
Success #stdin #stdout 0.02s 9224KB
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stdin
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stdout
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-+--+ = 3
--+---+- = 3
++-+--+----+-+ = 6
+--+++-------+-+++-+ = 8
https://ideone.com/DUfH1z
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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