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For decades, Linux kernel developers used Pretty Good Privacy (PGP) to identify developers and their release artifacts. Git's PGP integration enabled signed tags to verify code repository integrity and signed commits to prevent hackers from impersonating legitimate developers.
，更多细节参见搜狗输入法下载
// 边界处理：nums1为空时直接返回空数组（避免后续无效计算）
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