输入：num = "1432219", k = 3
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.
，推荐阅读服务器推荐获取更多信息
漫步村中，会发现这里的墨香里混入了“新潮”的味道。
2025年，香港恒生指数全年累计涨幅高达27.77%，创下自2017年以来的最佳年度表现，仅次于深成指30%的年内涨幅。恒生科技指数同样表现亮眼，全年累计上涨23.45%，为自2020年设立以来的最佳年度表现。恒生国企指数年内也上涨22.27%，显示出港股整体市场的强劲复苏势头。