input: Write a function unique_factorial to calculate the Brazilian factorial of a given integer. The Brazilian factorial is defined as: unique_factorial(n) = n! * (n-1)! * (n-2)! * ... * 1!, where n is greater than 0. The function will take an integer as an argument and should return the unique factorial of this integer.
  assert unique_factorial(4) == 288
  assert unique_factorial(5) == 34560
  assert unique_factorial(7) == 125411328000
  assert unique_factorial(1) == 1
output: def unique_factorial(n):
      from math import factorial
      result = 1
      for i in range(1, n + 1):
          result *= factorial(i)
      return result