[ZJOI2009]多米诺骨牌

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 zjoi09domino.in Output file zjoi09domino.out