‘I know what I did, and more importantly, what I didn’t do,’ former US president says after six-hour deposition
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）。，这一点在safew官方下载中也有详细论述
“初めて・最・変化・危機” 転換点迎えたオリンピック。关于这个话题，服务器推荐提供了深入分析
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