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Jul 19th, 2018
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Python 0.10 KB | None | 0 0
  1. def f(n):
  2.   if n==1:
  3.     return 1
  4.   else:
  5.     return f(n-1)+2
  6.  
  7. n = int(input())
  8. print (f(n))
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