Competitive Coding 10

[MeghaN28]

No description provided.

[super30admin]

Interview Problem : Buy and Sell Stock (BestTimetoBuyandSellStock.java)

Strengths:

• Excellent use of the greedy approach - recognizing that summing all positive differences between consecutive days yields the maximum profit
• Clean, readable code with good variable naming
• Comprehensive comments explaining the approach and complexity analysis
• Correct complexity analysis provided
• Handles all test cases properly

Areas for Improvement:

• The solution is already optimal for this problem. No further optimizations are necessary.
• Consider adding a brief comment about why the greedy approach works (local optimal choices lead to global optimum in this case)

Minor Note:

• The reference solution uses a recursive approach with exponential time complexity, which is far less efficient. Your solution is superior in terms of time complexity while maintaining the same space complexity.

VERDICT: PASS

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Interview Problem: Peeking Iterator (PeekingIterator.java)

Strengths:

• Clean, readable implementation with good variable naming
• Correct handling of edge cases (iterator with no elements)
• Proper use of @OverRide annotations for interface methods
• Well-documented with comments explaining the approach and complexity

Areas for Minor Improvement:

• The comment header mentions "Brute Force Approach" which is slightly misleading - this is actually the optimal approach for this problem, not a brute force solution
• Could consider making the iterator field final since it's never reassigned

Overall, this is a solid implementation that matches the reference solution in both approach and quality.

VERDICT: PASS