Fix for Problem 9#430

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zhangyaoyuan2023111068 wants to merge 1 commit intoHanchuanXu:mainfrom

zhangyaoyuan2023111068:fix-solution9

Commits on Nov 22, 2025

fix(solution9): 修复了数组越界异常并添加等价类划分测试
 zhangyaoyuan2023111068
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