Create Sample.java

[Praniksha123]

completed hasing1

[super30admin]

Grouping Anagrams Together (Sample.java)

Strengths:

• Clean, readable code with helpful comments explaining the approach
• Correct algorithm that properly groups anagrams
• Good use of Java standard library methods (Arrays.sort, HashMap)
• Proper handling of edge cases (empty strings, single characters)
• Well-structured with clear variable naming

Areas for Improvement:

• Time complexity could be improved from O(N * K log K) to O(N * K) by using character frequency counting instead of sorting
• The sorting approach, while correct, is less efficient than the reference solution's hashing approach
• Consider using computeIfAbsent for more concise code instead of putIfAbsent followed by get

Note: The student submitted solutions for three different problems, but only the first one (Grouping Anagrams) is relevant to this evaluation. For future submissions, please focus on submitting only the solution requested.

VERDICT: PASS

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Isomorphic Strings

Strengths:

1. Correctly implements the bidirectional mapping pattern, which is the optimal approach for this problem
2. Clean, readable code with proper indentation
3. Efficient O(n) time complexity
4. Good use of early returns to exit when mismatches are detected

Areas for Improvement:

1. Variable naming: t1 and t2 are not descriptive. Consider renaming to something like sToTMap and tToSMap for better readability
2. The code is missing import statements (though they may be in a separate file or assumed)
3. Consider adding comments explaining the bidirectional mapping approach for future maintainability
4. The solution handles the problem well but could benefit from a brief comment block explaining the algorithm

Note: The student submitted code for three problems (groupAnagrams, isomorphic strings, wordPattern). Only Problem 2 (isomorphic strings) is being evaluated against the reference solution.

VERDICT: PASS

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Word Pattern

The Word Pattern solution is well-implemented. The bidirectional mapping approach is correct and handles the bijection requirement properly. The code is clean and readable with good variable naming.

One minor optimization: You could combine the two validation checks into a single condition to potentially reduce redundant lookups, but this is optional as the current implementation is clear and correct.

The solution demonstrates solid understanding of the problem and correctly implements the required bijection between pattern characters and words.

VERDICT: PASS