Keep reading for $1What’s included
// 步骤1：计算每辆车的到达时间（精确浮点数，禁止取整）
，更多细节参见夫子
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.
Платон Щукин (Редактор отдела «Экономика»)