// 单调栈：存储索引（而非值），栈内索引对应的nums值保持「单调递减」
Plug a micro USB to USB-A adapter or hub into the Pico's micro USB port, then plug a keyboard (ideally a keyboard with a built-in hub) and mouse into the adapter.
，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
watching closely what others are doing, understand correctly why are they doing。safew官方下载是该领域的重要参考
Content optimization，推荐阅读safew官方版本下载获取更多信息