Completed Hashing-1

[irrawaddy28]

No description provided.

[super30admin]

Group Anagrams (group_anagrams.py)

FEEDBACK must contain at Solution 3 (prime product) - the reference solution's approach. least 4 concrete points and must reference Solution 3 (prime product) - the reference solution's approach.

VERDICT: NEEDS_IMPROVEMENT

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Isomorphic Strings (isomorphic_strings.py)

Excellent work! Your solution demonstrates a thorough understanding of the problem and multiple approaches to solving it. Here are some specific observations:

Strengths:

1. Multiple approaches: Providing both the two-map solution (matching the reference) and the single-map-with-set solution shows versatility and deeper understanding.
2. Excellent documentation: The detailed comments explaining the reasoning, time/space complexity, and even why two maps are needed for bijection is exceptional.
3. Clear code structure: Functions are well-named and the test runner provides good coverage.
4. Correctness: Both implementations correctly handle all the test cases including edge cases like "eggd" vs "adda".

Minor suggestions for improvement:

1. In isomorphic_2, consider reordering the check for clarity:

   if c1 not in hmap:
       if c2 in hset:
           return False  # c2 already mapped to another key
       hmap[c1] = c2
       hset.add(c2)
   else:
       if hmap[c1] != c2:
           return False

   This makes the logic flow more naturally (check for invalid state first, then perform the mapping).

2. Consider adding a docstring to each function describing its purpose, parameters, and return value.

3. The assert statement is good for development but might not be ideal for production code where you might want to raise a more specific exception.

Overall, this is a high-quality solution that goes beyond what was asked.

VERDICT: PASS

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Word Pattern (word_pattern.py)

Strengths:

1. Excellent problem analysis with multiple solution approaches documented
2. Both solutions are correct and handle edge cases properly
3. Good use of Python idioms (zip, defaultdict)
4. Clear comments explaining the time/space complexity

Areas for Improvement:

1. Format: The solution should be wrapped in a Solution class with a method named wordPattern to match LeetCode's expected format
2. Variable naming: Avoid using str as a variable name since it shadows Python's built-in str type
3. Data structure choice: Use a regular dict instead of defaultdict(str) since you're checking membership with in before accessing values - the default factory is never utilized
4. Code organization: Consider consolidating into a single solution rather than having two separate functions, unless the goal is to demonstrate multiple approaches
5. Minor optimization: In word_pattern_3, you could simplify by using dict and set directly instead of defaultdict

VERDICT: PASS