leetcode/693: bit operations

[tony84727]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @tony84727, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new solution for LeetCode problem 693, which checks if a binary number has alternating bits. The implementation utilizes bit manipulation techniques for an optimized approach and includes a dedicated module with tests, ensuring its correctness and proper integration into the existing LeetCode problem set.

Highlights

• New LeetCode Problem Solution: A solution for LeetCode problem 693, 'Binary Number with Alternating Bits', has been added. This includes the core logic and comprehensive test cases.
• Bitwise Operations: The implemented solution leverages bitwise operations to efficiently determine if a given integer has alternating bits.
• Module Integration: The new solution module has been integrated into the main src/leetcode/mod.rs file, making it accessible within the project structure.

Changelog

• src/leetcode/algorithm_693/README.md
  • Added a new README file providing the problem title and a link to the LeetCode problem.
• src/leetcode/algorithm_693/mod.rs
  • Implemented the has_alternating_bits function using bitwise operations.
  • Included a comprehensive set of unit tests using test_case to validate the solution's correctness.
• src/leetcode/mod.rs
  • Added a new public module declaration for algorithm_693 to integrate the new solution into the LeetCode collection.

Activity

• No specific activity (comments, reviews, or progress updates) has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request adds a solution for LeetCode problem 693, "Binary Number with Alternating Bits". The implementation uses bitwise operations to check for alternating bits. While the approach is clever, it's a bit complex and the logic for calculating the number of bits for the mask is flawed, especially for inputs that are powers of two. I've suggested a more idiomatic, simpler, and robust solution that also uses bit manipulation but is easier to understand and verify for correctness.