message: Update minimum-factorization.py
diff: # Time: O(loga)
  # Space: O(1)
  -# Given a positive integer a,
  -# find the smallest positive integer b whose multiplication of each digit equals to a.
  -#
  -# If there is no answer or the answer is not fit in 32-bit signed integer, then return 0.
  -#
  -# Example 1
  -# Input:
  -#
  -# 48
  -# Output:
  -# 68
  -# Example 2
  -# Input:
  -#
  -# 15
  -# Output:
  -# 35
  -
  class Solution(object):
  def smallestFactorization(self, a):
  """
  