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  1. from functools import lru_cache
  2.  
  3. @lru_cache()
  4. def yoba(s, n):
  5. 	if n == 1:
  6. 		return 0 <= s < 10
  7. 	return sum(yoba(s - i, n - 1) for i in range(10))
  8.  
  9. print(yoba(1, 9))
Success #stdin #stdout 0.05s 10368KB
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Standard input is empty
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9
https://ideone.com/0VHoFZ
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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