Improve power sum algorithm #5652
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This commit enhances the PowerSum class in the backtracking package. The changes focus on improving code quality, readability, and documentation. Key improvements include: 1. Enhanced code structure and efficiency: - Removed class-level variables for better thread safety - Optimized the recursive approach to avoid unnecessary calculations - Simplified the overall logic for easier understanding 2. Improved readability: - Used more descriptive variable names (e.g., 'targetSum' instead of 'n', 'power' instead of 'x') - Enhanced method structure with a private recursive helper method 3. Better documentation: - Added comprehensive JavaDoc comments explaining the algorithm's purpose and implementation - Clarified the meaning of parameters, especially relating them to the original problem statement (N and X) - Improved inline comments for better code understanding 4. Adhered to Java best practices: - Improved encapsulation by making the recursive method private - Used Math.pow() directly instead of a custom power method 5. Maintained core functionality: - The algorithm still solves the same problem as before, but with improved code quality
manishraj27
requested review from
yanglbme,
vil02,
BamaCharanChhandogi,
alxkm and
siriak
as code owners
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #5652 +/- ##
============================================
- Coverage 58.59% 58.57% -0.03%
+ Complexity 3747 3746 -1
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Files 553 553
Lines 15924 15918 -6
Branches 3029 3029
============================================
- Hits 9331 9324 -7
Misses 6196 6196
- Partials 397 398 +1 ☔ View full report in Codecov by Sentry. |
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clang-format -i --style=file path/to/your/file.javaDescription
The
PowerSumclass has been refactored to enhance clarity, readability, and functionality while preserving its original purpose. The goal of the class remains to find the number of ways to express a given integer ( N ) as the sum of unique natural numbers raised to the power of ( X ).Key Changes:
Method Renaming:
summethod has been renamed tosumRecursiveto better convey its purpose as a recursive helper function.Parameters Renamed:
powSummethod have been renamed totargetSumandpowerfor better readability and understanding.Special Case Handling:
targetSumandpowerare zero. This is addressed by returning1, which is based on the convention that there is one way to sum to zero (by using nothing).Code Clarity:
Single Recursive Function:
Simplified Logic:
Overall Impact:
These changes not only improve the code's readability but also make it more intuitive for other developers to understand its functionality. The refactored code maintains the same algorithmic complexity while offering a clearer structure and better handling of edge cases.
Hacktoberfest
I would like to submit this pull request as part of Hacktoberfest. I believe this contribution meets the quality standards for the event and would appreciate if it could be considered for acceptance under Hacktoberfest-Accepted label.