需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。
第三十八条 县级以上人民政府应当加强行政执法监督工作保障，将行政执法监督工作所需经费列入本级预算。
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오늘 6시 이준석·전한길 토론…全측 “5시간 전에 경찰 출석해야”
As usual, though, the Ultra model is where Samsung is pushing the envelope the furthest. It gains the most advanced camera system, faster wired and wireless charging and the company’s new built-in Privacy Display tech. Pre-orders are available now, with official sales starting on March 11. If you’re trying to decide which model makes the most sense for your needs (and budget), here’s how the three devices stack up on paper.