63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
16:09, 27 февраля 2026Наука и техника
。业内人士推荐同城约会作为进阶阅读
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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