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）。
Трамп высказался о непростом решении по Ирану09:14，更多细节参见旺商聊官方下载
The earliest launch opportunity is now in April - but Nasa said the exact date would depend on how long the technical work would take.，更多细节参见51吃瓜
The sector was just beginning to boom amid post-World War Two economic prosperity, coupled with a growing preference among consumers for take-home drinks over soda fountains.，推荐阅读爱思助手下载最新版本获取更多信息
Раскрыты подробности о договорных матчах в российском футболе18:01