Update app.py

did a very naive implemetation

app.py

@@ -13,10 +13,80 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")
+
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
-        print(f"Agent returning fixed answer: {fixed_answer}")
+
+        # --- Addition ---
+        if match := re.match(r".*what is (\d+) \+ (\d+).*", question, re.IGNORECASE):
+            return str(int(match.group(1)) + int(match.group(2)))
+
+        # --- Multiplication ---
+        if match := re.match(r".*what is (\d+) \* (\d+).*", question, re.IGNORECASE):
+            return str(int(match.group(1)) * int(match.group(2)))
+
+        # --- Subtraction ---
+        if match := re.match(r".*what is (\d+) - (\d+).*", question, re.IGNORECASE):
+            return str(int(match.group(1)) - int(match.group(2)))
+
+        # --- Division ---
+        if match := re.match(r".*what is (\d+) / (\d+).*", question, re.IGNORECASE):
+            a, b = int(match.group(1)), int(match.group(2))
+            return str(a / b if b != 0 else "undefined")
+
+        # --- Factorial ---
+        if match := re.match(r".*factorial of (\d+).*", question, re.IGNORECASE):
+            return str(math.factorial(int(match.group(1))))
+
+        # --- Fibonacci ---
+        if match := re.match(r".*fibonacci of (\d+).*", question, re.IGNORECASE):
+            n = int(match.group(1))
+            def fib(n):
+                a, b = 0, 1
+                for _ in range(n):
+                    a, b = b, a + b
+                return a
+            return str(fib(n))
+
+        # --- Prime check ---
+        if match := re.match(r".*is (\d+) prime.*", question, re.IGNORECASE):
+            n = int(match.group(1))
+            if n < 2:
+                return "no"
+            for i in range(2, int(math.sqrt(n)) + 1):
+                if n % i == 0:
+                    return "no"
+            return "yes"
+
+        # --- Reverse string ---
+        if match := re.match(r".*reverse (?:the string )?'(.*)'.*", question, re.IGNORECASE):
+            return match.group(1)[::-1]
+
+        # --- Uppercase ---
+        if match := re.match(r".*uppercase of '(.*)'.*", question, re.IGNORECASE):
+            return match.group(1).upper()
+
+        # --- Lowercase ---
+        if match := re.match(r".*lowercase of '(.*)'.*", question, re.IGNORECASE):
+            return match.group(1).lower()
+
+        # --- Count words ---
+        if match := re.match(r".*count words in '(.*)'.*", question, re.IGNORECASE):
+            return str(len(match.group(1).split()))
+
+        # --- Count letters ---
+        if match := re.match(r".*count letters in '(.*)'.*", question, re.IGNORECASE):
+            return str(len(match.group(1)))
+
+        # --- Sort numbers ---
+        if match := re.match(r".*sort numbers (.*)", question, re.IGNORECASE):
+            numbers = re.findall(r"-?\d+", match.group(1))
+            sorted_nums = sorted(map(int, numbers))
+            return " ".join(map(str, sorted_nums))
+
+        # --- Default fallback ---
+        fixed_answer = "I don't know yet."
+        print(f"Agent returning fallback answer: {fixed_answer}")
         return fixed_answer
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):