[NOI2012]迷失游乐园

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 noi2012_park.in Output file noi2012_park.out

样例输入如下:

4 3

1 2 3

2 3 1

3 4 4