优化：如果某轮没有发生交换，说明已有序，提前结束
if (n <= 1) return n;
。关于这个话题，51吃瓜提供了深入分析
Фото: Mindaugas Kulbis / AP
Мощный удар Израиля по Ирану попал на видео09:41
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