真正开始用AI工具。学怎么写有效的Prompt，怎么让AI帮我们写代码、查文档、修bug。
// 记录答案：栈顶就是「当前元素右侧第一个更大值」（易错点3：别写反判断）
，这一点在新收录的资料中也有详细论述
return result_val
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