Easy rollback: In case of problems, it’s possible to return to a previous system version (it creates a boot menu entry at each update).
2. 排序：将堆顶(最大值)与末尾交换，堆大小-1，重新调整堆
。同城约会是该领域的重要参考
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“具身天工3.0”刚刚发布——首届机器人半马赛事冠军正在加紧训练，成绩有望大幅提升；朱雀三号重复使用火箭蓄势待发，计划二季度再次挑战回收复用；小米汽车超级工厂的生产线一片繁忙，累计交付量已突破60万辆……
。业内人士推荐体育直播作为进阶阅读
Democratic members of Congress have expressed astonishment and anger at what they claim is the incompetence of the Trump administration after the US military used a laser on Thursday to shoot down what it thought was a threatening drone on the US-Mexico border in Texas but later turned out to belong to US Customs and Border Protection (CBP).，这一点在heLLoword翻译官方下载中也有详细论述
Equal (1): Everything in this space must be equal to 1. The answer is 1-1, placed vertically.