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  1. from itertools import accumulate
  2.  
  3. f = lambda numbers: next((i for i, (n, s) in enumerate(zip(numbers, accumulate(numbers))) if 2 * n < s), -1)
  4.  
  5. print(f([1, 2, 3, 4]))
  6. print(f([1, 2, 3]))
  7. print(f([1, 2]))
Success #stdin #stdout 0.02s 28376KB
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3
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https://ideone.com/fIhS6i
language:
Python 3 (python  3.12)
created:
8 years ago
visibility:
public

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