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）。
Italy's prime minister, by contrast, is having to perform the most excruciating dance - between Italian voter opinion and what she believes is in her country's and her own best interest on the world stage. So far, Giorgia Meloni has kept a very low profile on the US-Israeli attacks on Iran. She is one of the few leaders in Europe to have a truly warm relationship with Donald Trump.。im钱包官方下载是该领域的重要参考
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