Антонина Черташ
定存什么：要下标/距离就栈里存索引，只要值就存值或存索引再 nums[i] 取。
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def __init__(self):
展望2026年，随着咖啡行业“万店俱乐部”竞争日趋激烈，外卖渠道的竞争将从价格补贴转向服务与体验的比拼。对于瑞幸而言，如何进一步释放规模效应、优化外卖渠道成本结构，同时通过产品创新与精细化运营提升用户价值，将成为破解盈利困局、巩固龙头地位的关键。（作者 | 谢璇，编辑 | 房煜）
The company also has a smart alarm that avoids alerting users to a low battery during the night, when they are likely to be asleep, since this often results in people disconnecting their alarm and forgetting about it.