代码要点：倒序遍历，先算右侧再推左侧；栈内维护「右侧候选更大值」，单调递增（栈顶最小）。
“My belief [is] that coming out with a fresh mind, first principles, is important. That’s why young people are particularly helpful in tech, because they’re less biased,” Amper recently told Fortune. “I think too much knowledge is actually bad in tech: You’re biased.”，推荐阅读同城约会获取更多信息
Discard old data: evict what's already buffered to make room。业内人士推荐im钱包官方下载作为进阶阅读
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