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  1. lst = [0, 1, 3, 8, 9, 10, 12, 13, 14, 17, 18, 20]
  2. w = []
  3. for i in range(0, len(lst) - 1):
  4.     if((lst[i + 1] - lst[i]) > 1):
  5.         w.append(lst[i])
  6.         w.append(lst[i+1])
  7. print(set(w))
Success #stdin #stdout 0.04s 44680KB
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Standard input is empty
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set([1, 3, 8, 10, 12, 14, 17, 18, 20])
https://ideone.com/442sUl
language:
Python (PyPy 2.7.13)
created:
8 years ago
visibility:
public

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