message: Update reordered-power-of-2.py
diff: -# Time: O((logn)^2)
  -# Space: O(logn)
  +# Time: O((logn)^2) = O(1) due to n is a 32-bit number
  +# Space: O(logn) = O(1)
  # Starting with a positive integer N,
  # we reorder the digits in any order (including the original order)
  