input: 
  from typing import List
  
  def find_max(list: List[int]) -> int:
      """Finds the maximum number from a list of non-negative integers.
      >>> find_max([1, 3, 12, 5, 8, 10])
      12
      """
      max_num = 0
      for i in list:
          if i > max_num:
              max_num = i
      return max_num
  
output:     max_num = 0
      for i in list:
          if i > max_num:
              max_num = i
      return max_num