摘要：
Here is a simple game. In this game, there are several piles of matches and two players. The two player play in turn. In each turn, one can choose a p 阅读全文
摘要：
A factory produces products packed in square packets of the same height h and of the sizes 1*1, 2*2, 3*3, 4*4, 5*5, 6*6. These products are always del 阅读全文