But Homeless Street Angels says there is only so much it can do.
他補充說：「春天時一個漢堡500萬里亞爾（3.81美元），現在要1200 萬（9.13美元）。這些數字根本無法理解。」。关于这个话题，safew官方下载提供了深入分析
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Author(s): Ruixuan Dong, Xiuqin Liu。91视频对此有专业解读
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。