Implement Mock-10: Buy and Sell Stock 2

[ashutosh-das-id]

No description provided.

[super30admin]

Interview Problem: Best Time to Buy and Sell Stock II (BuySellStock2.java)

Excellent work! Your solution demonstrates a strong understanding of the problem. Here are some observations:

Strengths:

1. Optimal Algorithm Choice: You identified the greedy approach, which is the most efficient solution for this problem. The reference solution uses an exponential-time recursive approach, but your O(n) greedy solution is provably optimal.
2. Clean Implementation: The code is concise, readable, and well-commented.
3. Correct Logic: The greedy strategy of capturing all positive price differences works because any profitable sequence can be decomposed into individual profitable transactions.

Minor Suggestions for Improvement:

1. Edge Case Consideration: While the current code handles the constraints correctly, you could add a brief check or comment about edge cases (e.g., empty array, single element).
2. Alternative Style: Some might prefer using a long for result if dealing with very large profits, though int is sufficient given the constraints (max profit = 310^4 * 10^4 = 310^8, which fits in int).
3. Variable Naming: Consider renaming result to profit for slightly more descriptive naming.

Overall, this is an excellent solution that outperforms the reference solution in both time and space complexity.

VERDICT: PASS

---

Interview Problem: Peeking Iterator

VERDICT REASON: [Brief reason for the stock market problem with maximum profit (LeetCode 122 - Best Time to Buy and Sell Stock II), NOT the Peeking Iterator problem.

The student has solved a completely different problem than what was asked. The problem asked for a Peeking Iterator implementation, but the student provided a solution for the Best Time to Buy and Sell Stock II problem.

VERDICT REan incorrect solution to the wrong problem. The student needs to redo this assignment with the correct problem solution.

VERDICT: NEEDS_IMPROVEMENT