https://feedx.net
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。。搜狗输入法2026对此有专业解读
，详情可参考搜狗输入法下载
Maxim Konovalov Co-founder, Nginx。同城约会对此有专业解读
While OpenAI did have a protocol to handle credible threats, the company is now saying it will do more. In an open letter to the Canadian government, OpenAI's Vice President of Global Policy Ann M. O’Leary did not offer any specific policy changes, but did mention that changes were already being implemented and more were coming.