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As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history. Scheduling problems d 阅读全文
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小希和Gardon在玩一个游戏：对一个N*M的棋盘，在格子里放尽量多的一些国际象棋里面的“车”，并且使得他们不能互相攻击，这当然很简单，但是Gardon限制了只有某些格子才可以放，小希还是很轻松的解决了这个问题（见下图）注意不能放车的地方不影响车的互相攻击。 所以现在Gardon想让小希来解决一个更 阅读全文
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传说在遥远的地方有一个非常富裕的村落,有一天,村长决定进行制度改革：重新分配房子。 这可是一件大事,关系到人民的住房问题啊。村里共有n间房间,刚好有n家老百姓,考虑到每家都要有房住（如果有老百姓没房子住的话，容易引起不安定因素），每家必须分配到一间房子且只能得到一间房子。 另一方面,村长和另外的村领 阅读全文
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There are a group of students. Some of them may know each other, while others don't. For example, A and B know each other, B and C know each other. Bu 阅读全文
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N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code better than others. Each 阅读全文
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A histogram is a polygon composed of a sequence of rectangles aligned at a common base line. The rectangles have equal widths but may have different h 阅读全文
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Cerror is the mayor of city HangZhou. As you may know, the traffic system of this city is so terrible, that there are traffic jams everywhere. Now, Ce 阅读全文
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There is a strange lift.The lift can stop can at every floor as you want, and there is a number Ki(0 <= Ki <= N) on every floor.The lift have just two 阅读全文
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You are a lover of bacteria. You want to raise some bacteria in a box. Initially, the box is empty. Each morning, you can put any number of bacteria i 阅读全文