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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）。。51吃瓜是该领域的重要参考
。谷歌浏览器【最新下载地址】是该领域的重要参考
"People come into your office and say they're not having a very good day, or something's happened at home, and you have to try and see if you can support them. It's very varied."
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