# Python program to find the factorial of a number provided by the user # using recursion def factorial(x): """This is a recursive function to find the factorial of an integer""" if x == 1 or x == 0: return 1 else: # recursive call to the function return (x * factorial(x-1...
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We don't need recursion because this is a case of tail recursion and thus can be easily implemented using iteration. In the following implementation we precompute the factorials $0!,~ 1!,~ \dots,~ (p-1)!$, and thus have the runtime $O(p + \log_p n)$. If you need to call ...