Solution

app/main.py

@@ -1 +1,46 @@
-# 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
+
+        if self.health > 0:
+            Animal.alive.append(self)
+
+    def __str__(self) -> str:
+        return (
+            f"Name: {self.name}, "
+            f"Health: {self.health}, "
+            f"Hidden: {self.hidden}"
+        )
+
+    def __repr__(self) -> str:
+
+        return f"{{{self}}}"
+
+
+class Herbivore(Animal):
+
+    def hide(self) -> None:
+        self.hidden = not self.hidden
+
+
+class Carnivore(Animal):
+
+    @staticmethod
+    def bite(animal: Herbivore | Carnivore) -> None:
+        if not animal.hidden and isinstance(animal, Herbivore):
+            animal.health -= 50
+            if animal.health <= 0:
+                Animal.alive.remove(animal)