* 时间O(n) 空间O(n)（理论最优，无冗余计算/存储）
In a live demo, Gore walked through how a new developer with no prior credentials spins up an identity, joins a Linux Foundation community, and then establishes a relationship with another participant using pairwise DIDs. Once that relationship exists, the two sides can exchange richer, verifiable relationship credentials (VRCs) that record facts such as when the relationship started, the level of trust it reflects, and how long the credential should remain valid.。关于这个话题，服务器推荐提供了深入分析
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* @param {number[]} speed 每辆车的速度数组（英里/小时），更多细节参见同城约会
How to reproduce
"But what kind of implications will they have for energy and the environment?"