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problem

A program that estimates the amount of CO2 emitted by cars is required.

一个需要估算汽车二氧化碳排放量的程序。

Information: An average petrol car produces 100g of CO2 / km with just a driver + 10g/km for each extra passenger. Cars can be assumed to hold no more than 3 passengers plus the driver so, if more than 4 people need to travel by car, two cars are required.

信息：

一辆普通汽车每公里产生 100 克二氧化碳，而每多一个司机，每多一个乘客，就会产生10克二氧化碳。假定汽车可以容纳不超过3名乘客外加一个司机，所以，如果超过4人需要乘汽车旅行，需要两辆车。

Inputs

number of people Distance in km

Output

Total CO2 produced travelling by car in g

输出：

汽车行驶的距离产生的二氧化碳

Example inputs:

9
1000

360000

The number of passengers provided will always be greater than 0 and less than 13.

乘客的数量大于 0 小于 13.

The distances provided will always be from 0 to 10000.

汽车行驶的距离大于 0 小于 10000.

All outputs must be in the form of integers.

所有输出的数据为整数。

Task

Build a program that calculates the average amount of CO2 in g, that is produced when travelling by car.

任务：

设置一个程序，可以计算出在汽车行驶时所排放的平均二氧化碳的量。（以克为单位）