input: 
  def find_minimum(add_values: List[int]) -> int:
      """ Accepts a list of integers which represent a sequence of values added to a data structure class
      that stores integer values. The task is to find the minimum value in the data structure after all
      values have been added.
  
      >>> find_minimum([5, 3, 8, 2, 9])
      2
      >>> find_minimum([1, 1, 1, 1])
      1
      """
  
output:     return min(add_values)