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。
Old Thames barges have been sunk in an estuary to reduce erosion and create a new "island" habitat for birds, in a project the National Trust believes to be the first of its kind in the UK.。关于这个话题，服务器推荐提供了深入分析
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Ready for the answers? This is your last chance to turn back and solve today's puzzle before we reveal the solutions.，这一点在im钱包官方下载中也有详细论述
translation, question answering, and text completion. It can