// 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）
The MX Master 4 is the latest evolution in a line of pioneering mice that dates back more than 20 years and has long been the mouse to beat for everything but hardcore PC gaming. Having given it a magnetic free-spinning scroll wheel, plenty of buttons and precise tracking, now Logitech is trying something different for its seven-generation: the ability to tap back at you.
这个“近”，并非指盈利轻而易举，而是指在当前的技术与市场条件下，硬件提供了路径最短、摩擦力最小、且可被清晰计算的变现通道，体现在三个维度。，详情可参考WPS下载最新地址
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