Solution

app/main.py

@@ -1 +1,36 @@
-# write your code here
+class Animal:
+    alive = []  # Class attribute to keep track of all living animals
+
+    def __init__(self, name):
+        self.name = name
+        self.health = 100
+        self._hidden = False  # Hidden attribute is private
+        Animal.alive.append(self)  # Add to the list of living animals
+
+    @property
+    def hidden(self):
+        return self._hidden
+
+    @hidden.setter
+    def hidden(self, value):
+        self._hidden = value
+
+    def __repr__(self):
+        return f"{{Name: {self.name}, Health: {self.health}, Hidden: {self.hidden}}}"
+
+    @classmethod
+    def remove_dead(cls):
+        cls.alive = [animal for animal in cls.alive if animal.health > 0]
+
+
+class Herbivore(Animal):
+    def hide(self):
+        self.hidden = not self.hidden
+
+class Carnivore(Animal):
+    def bite(self, target):
+        if isinstance(target, Herbivore) and not target.hidden and target in Animal.alive:
+            target.health -= 50
+            if target.health <= 0:
+                target.health = 0
+                Animal.remove_dead()