// TypeError: Cannot obtain lock — stream is permanently locked
思路：倒序单调栈。弹出所有 ≤ 当前身高的元素（这些人都能被看到），count 为弹出数量；若栈非空，还能看到栈顶（第一个更高的人），故 +1。能看到的人数 = count + (栈非空 ? 1 : 0)。
，这一点在WPS官方版本下载中也有详细论述
This year there were more than 30,000 applicants for 10,000 jobs at this stage, although some will have been doctors from abroad.
I've been part of the OSS community for 20+ years, consistently reflecting
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