Solution

app/main.py

@@ -1,6 +1,17 @@
 from typing import Callable
+from typing import Any
 
 
 def cache(func: Callable) -> Callable:
-    # Write your code here
-    pass
+    cached_results = {}
+
+    def wrapper(*args) -> Any:
+        print(
+            "Getting from cache" if args in cached_results
+            else "Calculating new result"
+        )
+        if args not in cached_results:
+            cached_results[args] = func(*args)
+        return cached_results[args]
+
+    return wrapper