'Solution'

app/main.py

@@ -1 +1,38 @@
-# write your code here
+from __future__ import annotations
+
+
+class Animal:
+    alive = []
+
+    def __init__(self,
+                 name: str,
+                 health: int = 100,
+                 hidden: bool = False) -> None:
+
+        self.name = name
+        self.health = health
+        self.hidden = hidden
+        Animal.alive.append(self)
+
+    def __repr__(self) -> str:
+        return (
+            f"{{Name: {self.name}, "
+            f"Health: {self.health}, "
+            f"Hidden: {self.hidden}}}"
+        )
+
+
+class Carnivore(Animal):
+
+    @staticmethod
+    def bite(herbivore: Herbivore) -> None:
+        if not isinstance(herbivore, Carnivore) and not herbivore.hidden:
+            herbivore.health -= 50
+        if herbivore.health <= 0:
+            Animal.alive.remove(herbivore)
+
+
+class Herbivore(Animal):
+
+    def hide(self) -> None:
+        self.hidden = not self.hidden