Jim Lovell, Fred Haise and Jack Swigert are rescued from the Pacific Ocean after their dramatic escape
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
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The rest of the material produces digestate which can be used as fertiliser by nearby farms.
int arr[] = {64, 34, 25, 12, 22, 11, 90};
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）。