For implementers, the locking model adds a fair amount of non-trivial internal bookkeeping. Every operation must check lock state, readers must be tracked, and the interplay between locks, cancellation, and error states creates a matrix of edge cases that must all be handled correctly.
'Cruel' passport rule stops woman seeing dying mum。快连下载安装是该领域的重要参考
Раскрыты подробности о договорных матчах в российском футболе18:01。业内人士推荐夫子作为进阶阅读
思路：先对 nums2 用单调栈求每个元素的下一个更大值，存入 Map 缓存；再遍历 nums1 直接查 Map 得结果。时间复杂度 O(len1 + len2)。