solution

app/main.py

@@ -1 +1,30 @@
-# write your code here
+class Animal:
+    alive = list()
+
+    def __init__(
+            self, name: str, health: int = 100, hidden: bool = False) -> None:
+        self.name = name
+        self.health = health
+        self.hidden = hidden
+        self.alive.append(self)
+
+    def __repr__(self) -> dict:
+        animal = (f"{{Name: {self.name}, Health: {self.health},"
+                  f" Hidden: {self.hidden}}}")
+        return animal
+
+
+class Herbivore(Animal):
+    def hide(self) -> None:
+        if self.hidden:
+            self.hidden = False
+        else:
+            self.hidden = True
+
+
+class Carnivore(Animal):
+    def bite(self, another_animal: Animal) -> None:
+        if not another_animal.hidden and isinstance(another_animal, Herbivore):
+            another_animal.health -= 50
+            if another_animal.health < 1:
+                Animal.alive.remove(another_animal)