For kernel maintainers, the idea is that these credentials would back the identities behind signed code: instead of relying solely on a PGP key signed at a conference years ago, maintainers could check a bundle of fresh credentials proving that the key they see belongs to the same person recognized by the Linux Foundation, their employer, or other trusted issuers. These credentials can be fed into transparency logs and other audit systems.
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。关于这个话题，im钱包官方下载提供了深入分析
int n = sizeof(arr)/sizeof(arr[0]);
优化：如果某轮没有发生交换，说明已有序，提前结束