Completed binary search 1

[sandeepkumarks]

No description provided.

[super30admin]

Search inside a Rotated Sorted Array (Problem1.java)

Strengths:

• Clean and readable code structure
• Correct use of binary search with proper boundary conditions
• Good variable naming (low, high, mid)
• Efficient use of integer division to avoid overflow
• Proper handling of all comparison cases

Areas for Improvement:

• The comment header mentions "Problem2" but the problem is about searching in a rotated sorted array - consider renaming to something more descriptive
• The class name "Problem2" is not descriptive; a more appropriate name would be "SearchInRotatedArray" or similar
• The comments could be more detailed, explaining the key insight about checking which half is sorted
• Minor: The condition nums[low] < nums[mid] could be nums[low] <= nums[mid] to handle edge cases more robustly (though both work for distinct values)

Overall, this is a solid implementation that correctly solves the problem with optimal time and space complexity.

VERDICT: PASS

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Search Inside a Sorted Array whose Length is unknown (Problem2.java)

Strengths:

• Clean implementation of the exponential search + binary search pattern
• Well-documented code with complexity analysis
• Correct handling of boundary conditions
• Follows good coding practices with meaningful variable names

Areas for Minor Improvement:

• The condition while(target > reader.get(high)) calls reader.get(high) twice per iteration. Consider storing this in a variable: int curr = reader.get(high); while(target > curr) { ... curr = reader.get(high); }
• Could add a check for when reader.get(high) == target during the exponential search phase to potentially return earlier, though this is optional.

Overall, this is a solid solution that correctly solves the problem with optimal time and space complexity.

VERDICT: PASS

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Search a 2D Matrix (Problem3.java)

Strengths:

• Excellent implementation that matches the reference solution exactly in approach and efficiency
• Well-documented with clear comments explaining the algorithm
• Clean, readable code with descriptive variable names
• Proper handling of edge cases (empty matrix would be handled by the length checks)
• Good practice of using low + (high - low) / 2 to avoid potential integer overflow

Areas for Improvement:

• Minor: The class name is "Problem1" but the problem title mentions "Problem3" - ensure consistency with problem naming conventions
• The solution is already optimal; no algorithmic improvements are needed

This is a solid, textbook implementation of binary search on a 2D matrix.

VERDICT: PASS