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Фото: Nick Wass / AP
。旺商聊官方下载是该领域的重要参考
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)。
From there, Michael took a less conventional path than many Silicon Valley executives by moving into government, serving from 2009 to 2011 as a White House fellow under President Barack Obama, serving as special assistant to then–Defense Secretary Robert Gates at the DOD where he managed projects in Afghanistan, Iraq, and Pakistan and oversaw efforts aimed at reducing bureaucracy to provide resources to soldiers.
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