Solution

app/main.py

@@ -1 +1,38 @@
-# write your code here
+class Animal:
+    alive: list["Animal"] = []
+
+    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) -> str:
+        return (f"{'{'}Name: {self.name},"
+                f" Health: {self.health}, "
+                f"Hidden: {self.hidden}{'}'}")
+
+    @classmethod
+    def del_dead_animal(cls, others: "Animal") -> None:
+        if others in cls.alive:
+            cls.alive.remove(others)
+
+
+class Herbivore(Animal):
+    def hide(self) -> None:
+        if self.hidden:
+            self.hidden = False
+        else:
+            self.hidden = True
+
+
+class Carnivore(Animal):
+    @staticmethod
+    def bite(other: "Animal") -> None:
+        if isinstance(other, Herbivore) and not other.hidden:
+            other.health = other.health - 50
+        Animal.del_dead_animal(other)