Add RangeSumQuery algorithm in prefix folder#7280
Merged
DenizAltunkapan merged 6 commits intoTheAlgorithms:masterfrom Feb 19, 2026
Merged
Add RangeSumQuery algorithm in prefix folder#7280DenizAltunkapan merged 6 commits intoTheAlgorithms:masterfrom
DenizAltunkapan merged 6 commits intoTheAlgorithms:masterfrom
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #7280 +/- ##
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- Coverage 79.34% 79.33% -0.01%
- Complexity 7001 7005 +4
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Files 783 784 +1
Lines 22980 22992 +12
Branches 4514 4516 +2
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+ Hits 18233 18241 +8
Misses 4020 4020
- Partials 727 731 +4 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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DenizAltunkapan
approved these changes
Feb 19, 2026
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Summary
This PR adds the RangeSumQuery algorithm in the
prefixfolder.It allows computing the sum of elements between any two indices in an integer array efficiently using the Prefix Sum technique.
How it works
Precomputes the prefix sum array in O(N) time.
Answers any range sum query in O(1) time using: prefixSum[right + 1] - prefixSum[left].
I have read CONTRIBUTING.md.
This pull request is all my own work -- I have not plagiarized it.
All filenames are in PascalCase.
All functions and variable names follow Java naming conventions.
All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
All new algorithms include a corresponding test class that validates their functionality.
All new code is formatted with
clang-format -i --style=file path/to/your/file.java