Трамп определил приоритетность Украины для США20:32
iterating over the patterns, trying to walk each pattern in the trie
。关于这个话题，WPS官方版本下载提供了深入分析
At runtime, we now don’t need to prepare or load anything. We can just
variable pointed to by val. An error is returned in case there is no
// 单调栈：存储索引（而非值），栈内索引对应的nums值保持「单调递减」