Complete coverage
思路：① 算每辆车到达时间 = (target - position) / speed；② 按位置降序排序；③ 单调递增栈：仅当当前时间 栈顶时间时压栈（新车队），否则合并。栈长即为车队数。可优化为用变量代替栈。
，详情可参考heLLoword翻译官方下载
If all you’re looking to do is just click a button and get a decent print for a reasonable price, we recommend Fujifilm’s Instax Mini 12. It’s a basic instant camera that’s similar to our former pick, the Instax Mini 11, but with some minor updates. It still takes less than five minutes to start shooting, but the setup process is easier since all you need to do is twist the lens to either “on” or “off.” Such ease of use, combined with the camera’s thinner build, makes it particularly well-suited for kids and those new to photography.
But as a concept gadget, I think the Legion Go Fold is a great showcase of how new technology (in this case, a flexible display) can bring new capabilities and greater flexibility to existing categories. And who knows, if a lot of people like the idea, it might encourage Lenovo to refine it and put it on sale for real. I would just be a bit worried about pricing, because all these components won't come cheap.
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