l00777 0 0 0 /root - var/roothome
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）。
。WPS官方版本下载对此有专业解读
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· 赵敏 · 来源：user资讯