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Description Joe works in a maze. Unfortunately, portions of the maze have caught on fire, and the owner of the maze neglected to create a fire esca... 阅读全文
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Problem Description Fat brother and Maze are playing a kind of special (hentai) game on an N*M board (N rows, M columns). At the beginning, each gr... 阅读全文
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Description You are given two pots, having the volume of A and B liters respectively. The following operations can be performed:FILL(i) fill the po... 阅读全文
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Description A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two st... 阅读全文
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Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the ... 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... 阅读全文
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Description Farmer John knows that an intellectually satisfied cow is a happy cow who will give more milk. He has arranged a brainy activity for co... 阅读全文
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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 ≤ 100... 阅读全文
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Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be fi... 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。 标准的回溯的问题，直接按行递归，就像八皇后的递归。代码如下：#in... 阅读全文