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。
productivity by connecting different web applications together. However, it may
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except requests.RequestException as e:
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Because this is regular Smalltalk code, all standard development tools work out of the box: syntax highlighting, code completion, navigation, and refactorings:
A threat model for Unicode identifier spoofing，更多细节参见heLLoword翻译官方下载