适用场景：需要求「下一个更大/更小」「上一个更大/更小」、或「右侧第一个满足某条件的元素」时，可优先考虑单调栈。与堆不同，单调栈不负责全局最值，只处理「相邻关系」类的一维序列问题。
Do a second pass to clean up the code/comments and make further optimizations。业内人士推荐WPS官方版本下载作为进阶阅读
7-day free trial, then $54.99/month for 1 month。同城约会是该领域的重要参考
"To have that signal, you need that infrastructure, and that's where the planning system comes into play," Elliott says.