Lawrence Yun, chief economist at the National Association of Realtors, estimated that with rates under 6%, roughly 5.5 million more households qualify for a mortgage than a year ago. He expects a share of them to actually enter the market this year.
1. 选择步长序列（如: n/2, n/4, ..., 1），更多细节参见爱思助手下载最新版本
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Source: Computational Materials Science, Volume 266，更多细节参见heLLoword翻译官方下载
// 栈空 → 无更大元素，返回-1；栈非空 → 取栈顶（第一个更大值）