需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。
Both Ginger and Grammarly are awesome writing tools, without a doubt. Depending on your needs, you might want to use Ginger over Grammarly. As per my experience, I found Grammarly easier to use than Ginger.
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Ofcom, the online regulator, said it could now apply to the courts to demand internet service providers block access to the site in the UK. This will depend on how the site, which also faces fines, responds over the next 10 days.