[NOI2011]智能车大赛

Grade Open Time Friday, 19 September 2014, 10:07 am
Discount 0.8 Time Discount Friday, 26 September 2014, 10:07 am
Allow late Yes Close Time Friday, 26 September 2014, 10:07 am
Input file noi2011_car.in Output file noi2011_car.out

样例输入如下:


2

1 1 2 2

2 0 3 4

1 1

3 0

1.0


样例图像即为题图