思路：单调递增栈 + k 控制删除次数。高位越小整体越小，遇更小数字时弹出栈顶大数（仅当 k0）；栈空且当前为 0 则跳过（避免前导零）；若遍历完 k 仍0，从末尾再删 k 位。
If you’d rather have one, much larger network in your home, you’re better off upgrading to mesh networking systems. Mesh systems come with a main router and a wireless access point or two that, by default, create one large Wi-Fi system that should be accessible throughout your whole home. They tend to be the best Wi-Fi routers you can get, but that also translates to more expensive, and possibly more complicated, devices. Mesh Wi-Fi systems are, by far, more costly than a simple extender, plus you may have to work with your internet service provider to get your home’s existing network working on your new router.
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張又俠曾被視為習近平在軍中最核心的盟友。兩人的父輩是革命戰友，都是陝西籍的西北軍領袖。
对场所进行检查的，经县级以上人民政府公安机关负责人批准，使用检查证检查；对确有必要立即进行检查的，人民警察经出示人民警察证，可以当场检查，并应当全程同步录音录像。检查公民住所应当出示县级以上人民政府公安机关开具的检查证。