Token成本 — 你需要权衡用户定价和利润率
圖像來源，Dan McKenzie，推荐阅读WPS下载最新地址获取更多信息
，更多细节参见safew官方下载
* 时间复杂度: O(nlogn) 空间复杂度: O(1) 稳定: ✗
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