某商场有一个100个车位的停车场，当车位未满时，等待的车辆可以进入并计时；当车位已满时，必须有车辆离开，等待的车辆才能进入；当车辆离开时计算停留的的时间，并且按照每小时1元收费。

汽车的输入信息格式可以是（进入/离开，车牌号，进入/离开时间），要求可以随时显示停车场内的车辆信息以及收费历史记录。

-A 100-space car park in a mall, when parking spaces under the age of waiting vehicles can enter and timing　vehicles to leave when the parking is full, you must wait for vehicles to enter　stay when the vehicle left the time, and charges one yuan per hour. Car input format can be (entering/leaving, license plate number, enter/leave time) requirements can be displayed at any time of the vehicles in the parking lot as well as pay history.