Perplexity 推出 Perplexity Computer2
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。。业内人士推荐Line官方版本下载作为进阶阅读
殷殷嘱托，满怀牵挂，饱含期待。，详情可参考safew官方下载
Add a cluster of points in one corner and watch that corner subdivide deeply while the rest of the space stays untouched. Then scatter a few points across the empty region and watch it split only where needed. The tree grows around the data.