const MS = window.MediaSource || window.ManagedMediaSource;
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。
，详情可参考Safew下载
Users can also manually switch to the "A*" routing engine in settings if they know their profile is highly experimental or unique.
拿起手机，去捕捉稍纵即逝的瞬间，祝大家春节快乐，马年拍大片！