Lintcode391 Number of Airplanes in the Sky solution 题解
【题目描述】Givenanintervallistwhichareflyingandlandingtimeoftheflight.Howmanyairplanesareontheskyatmost?Notice:Iflandingandflyinghappensatthesametime,weconsiderlandingshouldhappenatfirst.给出飞机的起飞和降落时间的列表,用i