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Blockchain technology was originally invented in 1991 by two mathematicians, Stuart Haber and W. Scot Stornetta. They first proposed the system to ensure that timestamps could not be tampered with.
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The crew blasted off from Cape Canaveral in a SpaceX Dragon spacecraft atop a Falcon 9 rocket.
// 易错点1：必须倒序遍历（正序无法正确缓存右侧的更大值）