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Problem Description Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N 阅读全文
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Description Bessie hears that an extraordinary meteor shower is coming; reports say that these meteors will crash into earth and destroy anything they 阅读全文
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Description 在一个给定形状的棋盘（形状可能是不规则的）上面摆放棋子，棋子没有区别。要求摆放时任意的两个棋子不能放在棋盘中的同一行或者同一列，请编程求解对于给定形状和大小的棋盘，摆放k个棋子的所有可行的摆放方案C。 Input 输入含有多组测试数据。 每组数据的第一行是两个正整数，n k， 阅读全文
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Problem Description There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black til 阅读全文
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Description Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only the digits 0 阅读全文