heat nan

摘要： Problem DescriptionA while ago I had trouble sleeping. I used to lie awake, staring at the ceiling, for hours and hours. Then one day my grandmother suggested I tried counting sheep after I'd gone to bed. As always when my grandmother suggests things, I decided to try it out. The only problem wa 阅读全文

摘要： Problem DescriptionNew Year is Coming! ailyanlu is very happy today! and he is playing a chessboard game with 8600. The size of the chessboard is n*n. A stone is placed in a corner square. They play alternatively with 8600 having the first move. Each time, player is allowed to move the stone to an u 阅读全文