input: from typing import List
  
  
  def max_of_three(a: float, b: float, c: float) -> float:
      """ Find the maximum of three numbers.
      >>> max_of_three(3, 4, 5)
      5
      >>> max_of_three(10, 5, 8)
      10
      >>> max_of_three(3, 3, 3)
      3
      """
output:     if a >= b and a >= c:
          return a
      elif b >= a and b >= c:
          return b
      else:
          return c