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）。
smart display, where you automatically begin at the top of the
，更多细节参见搜狗输入法2026
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
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By the end of the 21st century, only eight of the 21 cities that have hosted the Winter Olympics are projected to be cold enough to reliably host the Games due to climate change. Challenges faced by Milano Cortina 2026 organisers such as producing artificial snow, establishing transport links between remote locations and building new infrastructure are likely to become more omnipresent at future editions.