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暴力做法是对每个位置向右扫描找第一个更大值，O(n²)。可抽象为：元素像一排人，身高为数值。当前人「下一个更大」= 他右侧第一个没被挡住的人（比当前矮的都被挡住）。单调栈用 O(n) 维护「右侧候选更大值」：倒序遍历，弹掉 ≤ 当前的，栈顶即答案，再入栈当前值。
，更多细节参见safew官方版本下载
破五，也称送穷节。自古有“驱五穷”之俗，驱哪五穷？曰智穷、学穷、文穷、命穷、交穷。，这一点在一键获取谷歌浏览器下载中也有详细论述
char phase[num_classes] = {0};，这一点在Line官方版本下载中也有详细论述
Imagine a world in which you can do transactions and many other things without having to give your personal information. A world in which you don’t need to rely on banks or governments anymore. Sounds amazing, right? That’s exactly what blockchain technology allows us to do.