需要元素值：栈存值，或答案存索引后用 nums[res[i]] 取值。
Monica de Bolle
，这一点在爱思助手下载最新版本中也有详细论述
BYOB (bring your own buffer) reads were designed to let developers reuse memory buffers when reading from streams, an important optimization intended for high-throughput scenarios. The idea is sound: instead of allocating new buffers for each chunk, you provide your own buffer and the stream fills it.
[&:first-child]:overflow-hidden [&:first-child]:max-h-full"