for (int gap = n / 2; gap 0; gap /= 2) {
But in a modern twist, before they have even walked into the first room of the city’s new Ukraine Museum inside the bunker, visitors are “targeted” by a Russian drone just before its operator prepares to release the lethal shot, and see themselves in the firing line on the screen of the weapon’s camera.
。关于这个话题，服务器推荐提供了深入分析
How to reproduce
Фото: Mario Anzuoni / Reuters
// 易错点4：栈空时要存-1（题目要求无更大值返回-1），而非直接存stack2.at(-1)（会得到undefined）