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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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The build-out comes as new energy vehicle adoption remains strong. In 2025, China produced 16.626 million new energy vehicles and sold 16.49 million units, up 29% and 28.2% respectively, data from the China Association of Automobile Manufacturers showed.