Solution

app/main.py

@@ -1,25 +1,70 @@
-from abc import ABC
+from abc import ABC, abstractmethod
 
 
 class IntegerRange:
-    pass
+    def __init__(self, min_amount: int, max_amount: int) -> None:
+        self.min_amount = min_amount
+        self.max_amount = max_amount
+
+    def __set_name__(self, owner: type, name: str) -> None:
+        self.name = name
+
+    def __get__(self, instance: object, owner: type) -> int:
+        return instance.__dict__[self.name]
+
+    def __set__(self, instance: object, value: int) -> None:
+        if not self.min_amount <= value <= self.max_amount:
+            raise ValueError(
+                f"{self.name} should be between {self.min_amount}"
+                f" and {self.max_amount}"
+            )
+        instance.__dict__[self.name] = value
 
 
 class Visitor:
-   pass
+    age = IntegerRange(0, 120)
+    weight = IntegerRange(0, 300)
+    height = IntegerRange(0, 250)
+
+    def __init__(self, name: str, age: int, weight: int, height: int) -> None:
+        self.name = name
+        self.age = age
+        self.weight = weight
+        self.height = height
 
 
 class SlideLimitationValidator(ABC):
-    pass
+    @abstractmethod
+    def validate(self, visitor: Visitor) -> bool:
+        pass
 
 
 class ChildrenSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    def validate(self, visitor: Visitor) -> bool:
+        return (
+            4 <= visitor.age <= 13
+            and 20 <= visitor.weight <= 49
+            and 80 <= visitor.height <= 119
+        )
 
 
 class AdultSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    def validate(self, visitor: Visitor) -> bool:
+        return (
+            14 <= visitor.age <= 60
+            and 50 <= visitor.weight <= 120
+            and 120 <= visitor.height <= 220
+        )
 
 
 class Slide:
-    pass
+    def __init__(
+            self,
+            name: str,
+            limitation_class: SlideLimitationValidator
+    ) -> None:
+        self.name = name
+        self.limitation_class = limitation_class
+
+    def can_access(self, visitor: Visitor) -> bool:
+        return self.limitation_class.validate(visitor)