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A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a palindrome becau 阅读全文
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Eddy's interest is very extensive, recently he is interested in prime number. Eddy discover the all number owned can be divided into the multiply of p 阅读全文
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A boolean matrix has the parity property when each row and each column has an even sum, i.e. contains an even number of bits which are set. Here's a 4 阅读全文
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The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has no public highways. So the traffic is difficult in Flatopia. The Flatopia 阅读全文
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Two players, Stan and Ollie, play, starting with two natural numbers. Stan, the first player, subtracts any positive multiple of the lesser of the two 阅读全文
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蜘蛛牌是windows xp操作系统自带的一款纸牌游戏，游戏规则是这样的：只能将牌拖到比她大一的牌上面（A最小，K最大），如果拖动的牌上有按顺序排好的牌时，那么这些牌也跟着一起移动，游戏的目的是将所有的牌按同一花色从小到大排好，为了简单起见，我们的游戏只有同一花色的10张牌，从A到10，且随机的在一 阅读全文
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In the year 8888, the Earth is ruled by the PPF Empire . As the population growing , PPF needs to find more land for the newborns . Finally , PPF deci 阅读全文
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New 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 阅读全文