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）。
John O'Connell, chief executive of the TaxPayers' Alliance think tank, said: "It's an absolute disgrace that ministers have burnt through an extra £100m on top of what the inquiry itself has already spent.
A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.，推荐阅读夫子获取更多信息
Ian Gatt of the Scottish Pelagic Fishermen's Association criticised the timing of the announcement, saying progress was being made in quota-sharing negotiations between countries.，详情可参考雷电模拟器官方版本下载
Watch: BBC in Nancy Guthrie's hometown as sniffer dogs help search for clues
Жители Санкт-Петербурга устроили «крысогон»17:52，这一点在safew官方版本下载中也有详细论述