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）。
The Scream franchise just got fun again, thanks to Scream 7.
，这一点在91视频中也有详细论述
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08
“If the USA Women’s Hockey team wants a real celebration and invite ,,, I’ll host them in Las Vegas. Do some nice dinners and shows and good times,” he wrote. “I’m sure I can get a hotel and airline to help me out here and celebrate these women for real for real.”