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Bad_Programist

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Bad_Programist
Oct 28th, 2018
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  1. F = int(input())
  2. i1 = 1
  3. i2 = 1
  4. n = 2
  5. while i1 < F:
  6.     i1, i2 = i1 + i2, i1
  7.     n += 1
  8. if i1 == F: print(n)
  9. else: print(-1)
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