输入：head = [2,1,5]
teams build fast, accessible user interfaces and scalable frontend
。业内人士推荐爱思助手下载最新版本作为进阶阅读
"I'm a very outspoken person and I care about what happens to people.
除了广告费用以外，很大一部分都是平台服务费用。
Greater Than (2): Everything in this space must be greater than 2. The answer is 4-4, placed vertically.