A perfectly practicable 1930s technology, but you can already see the downsides.
A new feature in the Gemini app will let users hand off multi-step tasks, like ordering a rideshare or building a grocery cart. The feature, which will first arrive in beta, runs in the background while users perform other tasks. Gemini's progress can be monitored live via notifications, so users can see what it's doing and jump in at any time.
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"We had Stevie Wonder last year. He absolutely loved playing here because of the acoustics and played a couple of songs he hasn't played in years because he wanted to play them in this venue.
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）。