The King was given his own chair and silk cushion to witness the British-Nigerian designer's Notting Hill-inspired runway, which was set against a backdrop of the area of London she grew up in.
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。谷歌浏览器【最新下载地址】对此有专业解读
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)。
stack.pop(); // 弹出无效候选值