Backtracking 1 done

[neelp1025]

No description provided.

[super30admin]

Strengths:

• The student has provided two different approaches (iterative and recursive) for the combination sum problem, demonstrating a good understanding of the problem.
• The code is well-commented and easy to follow.
• The student correctly handles edge cases, such as leading zeros in the expression add operators problem.

Areas for Improvement:

• The time complexity analysis for the combination sum problem could be more accurate. The current analysis (O(m^2 * n^2)) is not correct; it should be O(n * 2^(m+n)).
• For the combination sum problem, the recursive solution could be optimized by avoiding creating new ArrayLists in each recursive call, similar to the reference solution.
• The space complexity analysis for the combination sum problem could be more precise (O(n * h) instead of O(h)).