Complete Hashing-2 assignment

[tejbharath]

No description provided.

[super30admin]

Subarray Sum Equals K (SubArraySumEqualsK.java)

[Constructive feedback for the student]

VERDICT: PASS

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Contiguous Array (ContiguousArray.java)

Strengths:

1. Your solution correctly implements the running sum + HashMap approach, which is the optimal solution for this problem.
2. Good defensive programming with the null/empty array check.
3. Clear comments explaining the approach and complexity.
4. The code is well-organized and readable.

Areas for Improvement:

1. The if (rSum == 0) check is redundant. When rSum == 0, the map already contains 0 (with value -1), so the existing logic max = Math.max(max, i - map.get(rSum)) would compute i - (-1) = i + 1, which is the same result. You can remove this redundant check for cleaner code.
2. Consider adding a brief comment explaining why map.put(0, -1) is needed (to handle subarrays starting from index 0).

Overall, your solution is correct and efficient. The minor redundancy doesn't affect correctness or performance significantly.

VERDICT: PASS

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Longest Palindrome (LongestPalindrome.java)

The student has done an excellent job solving this problem. Their solution is correct, efficient, and well-documented. The approach matches the reference solution exactly, using a HashSet to track characters with odd counts. The added input validation for null/empty strings and single-character strings is a good defensive programming practice, even though the problem constraints guarantee s.length >= 1.

VERDICT: PASS