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）。
They were taking part in the first crewed test flight of the Starliner spacecraft, developed by aerospace company Boeing.
，这一点在搜狗输入法2026中也有详细论述
Последние новости。关于这个话题，Line官方版本下载提供了深入分析
All-in-one tool (grammar checker + spell checker + punctuation checker)