Again, it depends on the context. If it’s for a one-off event with a lot of people you don’t know, there’s probably no need.
Credit: Screenshot courtesy of Truth Social
。一键获取谷歌浏览器下载对此有专业解读
Morgan Christie, from Fife, fell in love with Yungblud when she was 15 due to his "outspoken and very political" songs.
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)。