Lambert 指出，Anthropic 把三家公司并排列在同一篇博客里，掩盖了一个关键差异：它们做的根本不是同一件事，量级天差地别，动机也各有侧重。
'Stem the tide'
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Whether you have carpeted floors, hard floors, pets, or shoes that always seem to bring in dirt, this vacuum is built to handle it all. It comes with three different attachments for cleaning high, low, and all the annoying little places, as well as a wall dock and charger for easy storage.。业内人士推荐safew官方版本下载作为进阶阅读
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。