需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。
Mesh routers, or mesh Wi-Fi systems, use multiple devices (or nodes) across your home to create a larger home network. Essentially, you have multiple routers around your home with these systems, and that will hopefully provide the best coverage possible. Wi-Fi extenders, on the other hand, are usually just one device that extends your existing Wi-Fi signal, and they often require you to switch networks when connecting. Wi-Fi extenders are more affordable, though, and are great if you’re traveling or need a Wi-Fi signal in harder-to-reach areas. However, a mesh router can offer a better long-term solution to upgrade your entire home’s Wi-Fi.
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對此，特朗普在上週五下午匆忙召開的記者會上，猛烈抨擊那些反對他的大法官。他表示，自己對三位投下反對票的保守派大法官感到「羞恥」，並稱三位自由派大法官是「恥辱」。
– The torn interior uses the style defined in interior_style.