// 易错点5：必须将当前元素入栈（作为左侧元素的候选更大值，漏写则栈始终为空）
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。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
What makes this a privilege escalation rather than a misconfiguration is the sequence of events.
// 易错点4：栈空时返回1而非i+1 → 仅i=0时正确，i0时（如i=3）会返回1而非4