优势：时间复杂度O(n+k)，k为数据范围
Ранее потолок рухнул в одном из домов в центре Санкт-Петербурга. Инцидент произошел в здании дореволюционной постройки. Вскоре после обрушения потолка в квартире треснула труба отопления, залив все кипятком.，更多细节参见搜狗输入法下载
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The research team ran nineteen drills in three days. Some began with a mild warning over the intercom: “Ladies and gentlemen, this is your captain speaking. We will be encountering a line of thunderstorms in about ten minutes.” The rest began more urgently: “All passengers and flight attendants, please be seated immediately.” The more emphatic announcement prompted a quicker reaction. Still, at best, only two-thirds of the occupants were buckled up after seventy seconds. On average, the passengers needed a minute and a half to take their seats; the flight attendants, who had to stow their gear first, needed at least four minutes. Fully a third of the occupants were still out of their seats after seventy seconds.
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