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Nov 17th, 2019
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Python 0.17 KB | None | 0 0
  1. from math import factorial
  2.  
  3. a = float(input('a: '))
  4.  
  5. for n in range(0, 99999):
  6.     if ((-1)**n)*factorial(n) == a:
  7.         print('Номер елемента:', n)
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