We can do better. What we actually want is to sleep until the state changes, not sleep for an arbitrary duration and check.
Польша выступила против сил НАТО на Украине01:48，这一点在PDF资料中也有详细论述
《政府工作报告》有关房地产内容 界面新闻整理制图，详情可参考旺商聊官方下载
When are the Brit Awards 2026?The Brit Awards 2026 takes place on Feb. 28 at the Co-op Live arena in Manchester. The awards and performances will begin at 8:15 p.m. GMT.
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。