[Grouping anagrams && Isomorphic && Pattern to Char ]

[takchiks]

No description provided.

[super30admin]

Strengths:

• The solution correctly groups anagrams using a sorted string as the key.
• The code is clear and easy to understand.
• The use of HashMap and ArrayList is appropriate.

Areas for Improvement:

• The time complexity can be improved by using a more efficient method to generate the key, such as the prime number hashing technique, which avoids sorting and runs in O(N * K). However, for the given constraints, the current solution is acceptable.
• The student should ensure that only the relevant code for the problem is submitted. The inclusion of unrelated files (Isomorphic.java and WordPattern.java) might indicate a packaging error.

[super30admin]

Strengths:

• The solution correctly groups anagrams by using the sorted string as a key.
• The code is clean and easy to understand.
• The use of HashMap and ArrayList is appropriate.

Areas for Improvement:

• The time complexity can be improved by avoiding sorting. Consider using a hashing technique similar to the reference solution, which uses prime numbers to generate a unique hash for each anagram group. This would reduce the time complexity to O(N * K).
• The solution includes code for other problems (Isomorphic.java and WordPattern.java) which are not relevant to the current problem. In the future, ensure that only the solution for the given problem is submitted.

Optimization:

• Instead of sorting each string, you can use a frequency array or prime number multiplication to create a key. For example, assign each letter a prime number and multiply them together to get a unique product (though be cautious of integer overflow for long strings). Alternatively, you can generate a string representation of the character counts (e.g., "2a1b" for "aab") which would be O(K) per string.