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）。
"It's a big nationalist symbol, it's attached to sovereignty. Would the Venezuelans be willing to do whatever the US says and roll over? I don't think so."。业内人士推荐91视频作为进阶阅读
，推荐阅读雷电模拟器官方版本下载获取更多信息
The same picture is seen across the transport network - currently a third of railways are at risk of flooding, which leads to cancellations and damaged infrastructure.
const arr = [];，这一点在safew官方下载中也有详细论述