Array2

[YogeshPardeshi]

No description provided.

[super30admin]

Disappeared Numbers (Problem1.java)

Strengths:

• Clean, readable implementation that solves the problem correctly
• Good use of appropriate data structures (HashSet for O(1) lookups)
• Time-efficient solution (O(n)) compared to the reference's O(n²)
• Proper handling of edge cases

Areas for Improvement:

• Space usage: The follow-up challenge specifically asks for O(1) extra space. Consider using the array itself to mark visited numbers by negating values at corresponding indices, then iterating again to find unmarked indices.
• Could add comments explaining the approach for better maintainability

VERDICT: PASS

---

max and min (Problem2.java)

This submission appears to be for an entirely different coding problem. The submitted code solves the "Game of Life" problem where you simulate cellular automaton rules, but the assigned problem is "max and min" which requires finding the minimum and maximum values in an array using an efficient comparison strategy (fewer than 2*(N-2) comparisons).

Strengths of the submitted Game of Life solution:

• Clean separation of concerns with a helper method getCount()
• Good use of in-place update technique with marker values
• Proper boundary checking
• Well-documented code structure

Areas for Improvement:

• The solution does not address the assigned problem at all
• For the max/min problem, the correct approach would be to compare elements in pairs, reducing comparisons from 2*(N-1) to approximately 3*(N/2) comparisons

Note: If you intended to submit a solution for the max/min problem, please review the reference solution which demonstrates the pair-comparison technique for finding both min and max efficiently.

VERDICT: NEEDS_IMPROVEMENT

---

Life Game

Strengths:

• The in-place solution correctly uses intermediate states (2 and 3) to track transitions without losing original information
• The neighbor counting logic properly handles boundary conditions with the bounds check
• Code is well-commented and easy to follow
• The solution matches the reference implementation in both approach and efficiency

Areas for Improvement:

• The class name "Problem2" is not descriptive. For a real coding environment, it should be named something like "GameOfLife" or "Solution" to reflect the problem being solved
• The directions array could be defined as a static final variable since it never changes, which is a minor optimization and improves clarity

VERDICT: PASS