// 计算天数：栈非空→栈顶索引-当前索引；栈空→0（易错点3：索引差别写反）
Nature, Published online: 24 February 2026; doi:10.1038/d41586-026-00514-y，更多细节参见体育直播
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Mean: 290.426 ms | 297.152 ms