This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
Последние новости。搜狗输入法2026是该领域的重要参考
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Фото: Benoit Tessier / Reuters。关于这个话题，91视频提供了深入分析
if (right - left <= 1) return; // 只有一个元素，无需排序