需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。
In the football world, the Premier League, UEFA, and FIFA all have strict requirements for connectivity, not least because of the massive bandwidth needs of broadcasters.
，更多细节参见heLLoword翻译官方下载
Жители Санкт-Петербурга устроили «крысогон»17:52
* @param right 右边界（不包含）