// 测试用例验证（全覆盖核心场景）
由于皮克斯和 iPod 的关系，乔布斯与迪士尼 CEO 鲍勃 · 艾格有过多次合作和交流，两人关系十分友好，乔布斯还曾经邀请艾格作为苹果发布会的神秘嘉宾。
，详情可参考Line官方版本下载
stack2.pop(); // 弹出无效的候选值，推荐阅读WPS官方版本下载获取更多信息
Why are Afghanistan and Pakistan fighting?
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