Quenched my java#18

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SketchRudy wants to merge 7 commits intoauberonedu:mainfrom

SketchRudy:main

Commits on Sep 25, 2025

Implement oddSum and shortestWord methods with proper logic and error handling
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Finished function that returns adults older than 18
SketchRudy
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Implement error handling and logic for biggestNumber and frequencies methods
SketchRudy
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Implement logic for frequency map, level count, and sum at level methods
SketchRudy
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Implement sumMatch method and helper functions for tree and list sums
SketchRudy
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Refactor sumMatch method and implement sinkCount method with breadth-first search for vertex counting
SketchRudy
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Return the count of sinks instead of 0 in the Practice class
SketchRudy
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