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Update main.py #12

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2 changes: 1 addition & 1 deletion main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ def nth_fibonacci_util(n, memo):

# Base case: if n is 0 or 1, return n
if n <= 1:
return n
return m
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Variable Name Error

The variable 'm' is undefined in this scope. This will cause a NameError when the function is called with n <= 1, breaking the Fibonacci calculation entirely.

Suggested change
return m
return n
Standards
  • Python Variable Scope
  • Algorithm Correctness

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critical

This change introduces a NameError because the variable m is not defined in the scope of this function. For the base case of a Fibonacci sequence, the function should return n itself.

Suggested change
return m
return n

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Variable Name Error

The variable 'm' is undefined in this context. This will cause a NameError when the function is called with n <= 1, completely breaking the Fibonacci calculation functionality.

Suggested change
return m
return n
Standards
  • Python Naming Conventions
  • Algorithm Correctness

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Undefined Variable Reference

The function attempts to return variable 'm' which is undefined. This will cause a NameError when the function is called, breaking the Fibonacci calculation completely.

Suggested change
return m
return n
Standards
  • Python Variable Scope
  • Function Return Correctness

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Variable Name Error in Fibonacci Base Case

The variable 'm' is undefined in this context. This will cause a NameError when the function is called with n <= 1, breaking the Fibonacci calculation completely.

Suggested change
return m
return n
Standards
  • Python Variable Scope
  • Algorithm Correctness

Comment on lines 20 to +21
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Undefined Variable Reference in Fibonacci Base Case

The code attempts to return an undefined variable 'm' in the Fibonacci base case. This will cause a NameError exception whenever the function is called with n <= 1, completely breaking the algorithm's functionality.

Suggested change
if n <= 1:
return n
return m
if n <= 1:
return n
Standards
  • Python Variable Scope Rules
  • Algorithm Correctness


Comment on lines 19 to 22
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⚠️ Potential issue

Fix undefined name in base case (NameError) and validate input.

Returning m triggers a runtime NameError on the base case. Ruff flagged this as F821. Return n and optionally guard against negative inputs.

Apply this diff:

-    # Base case: if n is 0 or 1, return n
-    if n <= 1:
-        return m
+    # Base case: handle invalid input first, then trivial cases
+    if n < 0:
+        raise ValueError("n must be non-negative")
+    if n <= 1:
+        return n
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
# Base case: if n is 0 or 1, return n
if n <= 1:
return n
return m
# Base case: handle invalid input first, then trivial cases
if n < 0:
raise ValueError("n must be non-negative")
if n <= 1:
return n
🧰 Tools
🪛 Ruff (0.12.2)

21-21: Undefined name m

(F821)

🤖 Prompt for AI Agents 
In main.py around lines 19 to 22, the base case mistakenly returns an undefined
name `m` causing a NameError; change the return to `n` and add input validation
to guard against negative inputs (e.g., raise a ValueError when n < 0) so
callers get a clear error for invalid input before recursion/logic proceeds.

# Check if the result is already in the memo table
if memo[n] != -1:
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