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）。
"Fields of Gold" by Sting (Episode 6)
。safew官方版本下载对此有专业解读
Spacewoman is in selected cinemas now.
Foreign minister says 272 Ghanaians are thought to have been drawn into battle since 2022, after he visited Kyiv