Credit: Samsung / Amazon
栈（stack）是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序（单调递增或单调递减），从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。。业内人士推荐爱思助手下载最新版本作为进阶阅读
。业内人士推荐雷电模拟器官方版本下载作为进阶阅读
The US secretary of state Marco Rubio told ambassadors in the Middle East to stop making public comments that could inflame tensions and undermine Donald Trump’s pressure on Iran to relinquish its capacity to produce a nuclear weapon, according to a memo obtained by the Guardian.
copy(tasks2, tasks)，详情可参考safew官方版本下载