// 题目要求找「右侧第一个 ≤ cur」的元素 → 弹出所有 cur 的，栈顶即为折扣
Сын Алибасова задолжал налоговой более 1,8 миллиона рублей20:37
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the University of Utah, starting in 1988, but weren't contributed to the
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and the magic here is that we can do this with zero back-and-forth movement. we find the matches with two linear scans, one right to left to mark exactly where the matches start, and one left to right to eliminate overlap. right to left sweep marks all matches in a single pass. it’s completely deterministic, every possible future has been accounted for, and we just let the automaton do its thing.