input: 
  def find_minimum_value(int_list: IntList) -> int:
      """ Given an instance of IntList, this function returns the minimum integer value
      stored in the list.
      >>> int_list_instance = IntList()
      >>> int_list_instance.add_value(10)
      >>> int_list_instance.add_value(5)
      >>> int_list_instance.add_value(3)
      >>> find_minimum_value(int_list_instance)
      3
      >>> int_list_instance.add_value(1)
      >>> find_minimum_value(int_list_instance)
      1
      """
      return int_list.find_min()
  
output:     return min(int_list.get_values())