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DescriptionThe Sky is Sprite.The Birds is Fly in the Sky.The Wind is Wonderful.Blew Throw the TreesTrees are Shaking, Leaves are Falling.Lovers Walk p... 阅读全文
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DescriptionSometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party whe... 阅读全文
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Description大家常常感慨，要做好一件事情真的不容易，确实，失败比成功容易多了！做好“一件”事情尚且不易，若想永远成功而总从不失败，那更是难上加难了，就像花钱总是比挣钱容易的道理一样。话虽这样说，我还是要告诉大家，要想失败到一定程度也是不容易的。比如，我高中的时候，就有一个神奇的女生，在英语... 阅读全文
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Description 小明对数的研究比较热爱，一谈到数，脑子里就涌现出好多数的问题，今天，小明想考考你对素数的认识。 问题是这样的：一个十进制数，如果是素数，而且它的各位数字和也是素数，则称之为“美素数”，如29，本身是素数，而且2+9 = 11也是素数，所以它是美素数。 给定一个区间，你能... 阅读全文
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DescriptionThere is a hill with n holes around. The holes are signed from 0 to n-1.A rabbit must hide in one of the holes. A wolf searches the rabbit ... 阅读全文
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DescriptionBy definition palindrome is a string which is not changed when reversed."MADAM"is a nice example of palindrome. It is an easy job to test w... 阅读全文
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DescriptionA palindrome is a symmetrical string, that is, a string read identically from left to right as well as from right to left. You are to write... 阅读全文
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DescriptionA subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = another sequence... 阅读全文
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DescriptionMany years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as do... 阅读全文
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DescriptionWe give the following inductive definition of a “regular brackets” sequence:the empty sequence is a regular brackets sequence,ifsis a regul... 阅读全文