Author(s): Marco Seiz, Tomohiro Takaki
描述：给定字符串 num（非负整数）和整数 k，移除 k 位数字，使剩余数字最小。以字符串形式返回（不含前导零）。
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Printer" on the 3614 and 3624. The ATM could print four lines of text, 34
While there are legitimate debates to be had about immigration and crime, a lot of this content goes beyond the evidence available in reality.
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# Export as CSV，更多细节参见旺商聊官方下载
Single-character pairs only. Multi-character confusables (rn vs m, cl vs d) are outside scope. These are a known gap in confusables.txt itself.