So Squire and his colleagues analysed everything they could see in Lucy's room: the bedspread, her outfits, her stuffed toys. Looking for any element which might help.
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)。
，这一点在旺商聊官方下载中也有详细论述
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The deliberately provocative national advertising campaign calls for all social media to be banned for children under the age of 16. The images on billboards and social media make a number of stark statements related to health.
Nasa's Space Shuttles, which flew for three decades, reached breathtaking highs, but also some terrible lows.