input: 
  class IntList:
      def __init__(self):
          self.values = []
     
      def add_value(self, value: int) -> None:
          """ Adds an integer value to the list of values.
          >>> int_list = IntList()
          >>> int_list.add_value(42)
          >>> int_list.values
          [42]
          >>> int_list.add_value(23)
          >>> int_list.values
          [42, 23]
          """
          self.values.append(value)
      
      def find_min(self) -> int:
          """ Finds and returns the minimum integer value in the list.
          >>> int_list = IntList()
          >>> int_list.add_value(42)
          >>> int_list.add_value(23)
          >>> int_list.add_value(7)
          >>> int_list.find_min()
          7
          >>> int_list.values = [42, 23, 7]
          >>> int_list.find_min()
          7
          """
          return min(self.values)
  
output:     
      def find_max(self) -> int:
          """ Finds and returns the maximum integer value in the list.
          >>> int_list = IntList()
          >>> int_list.add_value(42)
          >>> int_list.add_value(23)
          >>> int_list.add_value(7)
          >>> int_list.find_max()
          42
          >>> int_list.values = [42, 23, 7]
          >>> int_list.find_max()
          42
          """
          return max(self.values)
  