input: 
  from typing import List
  
  class IntList:
      def __init__(self):
          self.values = []
      
      def add_value(self, value: int) -> None:
          """Add an integer value to the list."""
          self.values.append(value)
      
      def find_min(self) -> int:
          """Find and return the minimum value in the list."""
          return min(self.values)
  
  """
  >>> int_list = IntList()
  >>> int_list.add_value(5)
  >>> int_list.add_value(3)
  >>> int_list.add_value(8)
  >>> int_list.find_min()
  3
  """
  
output:     
      def find_max(self) -> int:
          """Find and return the maximum value in the list."""
          return max(self.values)
  
      def sum_values(self) -> int:
          """Calculate and return the sum of all values in the list."""
          return sum(self.values)
  
      def average_value(self) -> float:
          """Calculate and return the average of all values in the list."""
          return sum(self.values) / len(self.values) if self.values else 0
  