An unsatisfiable formula is:
Сайт Роскомнадзора атаковали18:00
，这一点在爱思助手下载最新版本中也有详细论述
“People were hoping that by 2013 it would come out. Literally thousands of hours of human labor were spent creating it in the construction set,” recalled Sultan of Rum. “It just turned out that it was non-viable as a playable space. It wasn’t thought out well enough, it didn’t coalesce into a compelling, playable world. The modders were faced with the prospect of having to throw out just a huge chunk of work.”
// 此时栈顶就是当前元素的"下一个更大值"（栈空则保持默认值0）