Hashing1

[YogeshPardeshi]

No description provided.

[super30admin]

Grouping Anagrams Together (Problem1.java)

Strengths:

• Clean, readable code with meaningful variable names
• Correct algorithm logic for grouping anagrams
• Good use of HashMap for O(1) lookup
• Proper handling of edge cases (empty strings, single characters)

Areas for Improvement:

• Time complexity could be improved from O(N * K log K) to O(N * K) by using a character frequency count instead of sorting
• Consider using map.computeIfAbsent(sortedStr, k -> new ArrayList<>()).add(str) to eliminate the containsKey check and make the code more concise
• The class name "Problem1" is not descriptive; consider naming it something like "GroupAnagrams" or "Solution"

VERDICT: PASS

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Isomorphic Strings (Problem2.java)

Strengths:

• Clean, readable implementation with good variable naming (sChar, tChar)
• Correct algorithm logic with proper early returns
• Slightly more space-efficient than the reference by using a HashSet instead of a second HashMap
• Well-structured with consistent indentation

Areas for Improvement:

• The HashSet variable name set is too generic; consider renaming to something more descriptive like usedTargetChars
• The reference solution's bidirectional mapping approach provides an additional safety check that this solution lacks (though the current approach is still correct)
• Could add a length check at the beginning for early exit (though this is optional since constraints guarantee equal length)

Overall, this is a solid solution that correctly solves the problem with good efficiency.

VERDICT: PASS

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Word Pattern (Problem3.java)

Strengths:

• Correctly implements the bidirectional mapping logic
• Clean and readable code structure
• Proper handling of edge cases (length mismatch)
• Good variable naming conventions

Areas for Improvement:

• The code is functionally equivalent to the reference solution and doesn't require significant changes
• Could consider using Map.getOrDefault() for slightly more concise code, but current approach is fine
• The solution is production-ready as-is

VERDICT: PASS