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。
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Huxley suggests a different solution in the short term, arguing that navies need to work together with shipping companies to provide protection. He points to Operation Earnest Will, the 1987-1988 campaign by the U.S., the U.K. and other allied nations to protect tankers in the Gulf during the Iran-Iraq War, as an example. “Weapons are more sophisticated now, but the escort system is still a possibility,” Huxley concludes.。关于这个话题，旺商聊官方下载提供了深入分析
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