message: Update remove-9.py
diff: # Time: O(logn)
  # Space: O(1)
  -# Start from integer 1, remove any integer that contains 9 such as 9, 19, 29...
  -#
  -# So now, you will have a new integer sequence: 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, ...
  -#
  -# Given a positive integer n, you need to return the n-th integer after removing.
  -# Note that 1 will be the first integer.
  -#
  -# Example 1:
  -# Input: 9
  -# Output: 10
  -# Hint: n will not exceed 9 x 10^8.
  -
  class Solution(object):
  def newInteger(self, n):
  """
  