在特朗普發表演說的同時，網站「加油巴迪」（GasBuddy）表示，在美國約15萬間加油站中，有4間加油站的汽油價格低於每加侖2美元。
Фото: Patrick Pleul/dpa (Photo by Patrick Pleul/ Picture alliance via Getty Images
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"The idea is that the bats that are in the main body of the church will live in here, rather than in the church itself," he explains.
代码要点：倒序遍历，先算右侧再推左侧；栈内维护「右侧候选更大值」，单调递增（栈顶最小）。