input: 
  class IntList:
      """Design a data structure in Python to store integer values.
      The data structure should support adding values and finding the minimum value stored.
      >>> my_list = IntList()
      >>> my_list.add_value(5)
      >>> my_list.add_value(3)
      >>> my_list.add_value(7)
      >>> my_list.find_min()
      3
      """
      def __init__(self):
          self.values = []
     
      def add_value(self, value):
          self.values.append(value)
      
      def find_min(self):
          return min(self.values)
  
output:     def __init__(self):
          self.values = []
     
      def add_value(self, value):
          self.values.append(value)
      
      def find_min(self):
          return min(self.values)