Completed Graph-1

[pratikb0501]

No description provided.

[super30admin]

Find the town Judge (Problem_1.py)

Strengths:

• Correctly implements the indegree concept
• Clean and readable code structure
• Efficient use of Python list operations
• Proper index conversion between 0-indexed array and 1-indexed labels

Areas for Improvement:

• Consider adding comments explaining the indegree concept for better readability
• Could add an early check: if trust is empty and n == 1, return 1 directly (though current solution handles this correctly anyway)

The solution is functionally equivalent to the reference solution and demonstrates solid understanding of the problem.

VERDICT: PASS

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Ball in the Maze (Problem_2.py)

Strengths:

• Clean BFS implementation with good variable naming
• Correct rolling ball logic implementation
• Proper use of deque for queue operations
• Good comments and code organization

Areas for Improvement:

1. Critical Bug: You mark cells as visited (maze[cr][cc] = 2) before rolling in all directions. This can cause issues when a ball rolls and returns to its starting position - that position won't be re-added to the queue even though it might be needed for other paths. Move the marking to after you've determined the ball stops at a new position.

2. Code Duplication: The rolling logic is repeated. Consider extracting it into a helper function like roll_ball(cr, cc, direction).

3. Edge Case Handling: The solution handles boundaries correctly during rolling, but the logic could be clearer with early returns or helper functions.

Suggested Fix:

if maze[nr][nc] != 2:
    q.append([nr, nc])
    maze[nr][nc] = 2  # Mark when adding to queue, not when popping

VERDICT: NEEDS_IMPROVEMENT