摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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

摘要： 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