暴力做法是对每个位置向右扫描找第一个更大值，O(n²)。可抽象为：元素像一排人，身高为数值。当前人「下一个更大」= 他右侧第一个没被挡住的人（比当前矮的都被挡住）。单调栈用 O(n) 维护「右侧候选更大值」：倒序遍历，弹掉 ≤ 当前的，栈顶即答案，再入栈当前值。
– effect: “torn-paper-reveal”
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The grocery chain, which sources all its mackerel from Scottish waters, said that from May 2026, North East Atlantic mackerel would no longer meet the supermarket's own responsible sourcing requirements.
Protection against chickenpox is offered in a new, combined vaccine called MMRV which will replace MMR. This combined jab helps protect against measles, mumps, rubella and varicella (chickenpox).