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）。
МИД России вызвал посла Нидерландов20:44
，这一点在91视频中也有详细论述
We have a lot of ways to change names in our code to add extra meaning to them.
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"But I think he looks back on it with no regrets - I don't think he would change a thing about it."