方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」
Цены на нефть взлетели до максимума за полгода17:55
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Hurdle Word 1 hintTo throw out.
12 February 2026ShareSave