completed backtracking 3

[kkhevna9252]

No description provided.

[super30admin]

Your solution for N-Queens is excellent. It correctly implements the backtracking algorithm with proper validation checks. The code is clean and well-commented. Here are a few minor suggestions:

• In the isValid function, you reassign the parameters i and j to row and col. While this works, it might be clearer to declare new variables directly (e.g., var r = i and var c = j) without modifying the parameters. Alternatively, you can use val for the parameters since they are not meant to be changed.
• Consider adding more comments within the helper functions to explain the steps, especially for learners who might be new to backtracking.
• The solution for WordSearch was included in the same submission, but the problem only asked for N-Queens. In the future, make sure to submit only the required solution unless otherwise specified.

Overall, great job!