At the first night of his first headline tour in Birmingham on Wednesday, it was literally up in lights above the stage throughout the show.
SAT (short for "satisfiability") is a logic problem that given a boolean formula, it asks whether the boolean formula has an assignment that makes the problem true. An example boolean formula is:
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// 记录答案：栈顶就是「当前元素右侧第一个更大值」（易错点3：别写反判断）
// ⚠️ 易错点4：循环条件写right = 0（会导致right-1越界），或把<=写成<（漏判相等的有序情况）