摘要：During several decades, scientists from planet Nibiru are working to create an engine that would allow spacecrafts to fall into hyperspace and move th
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摘要：It's time for music! A lot of popular musicians are invited to join us in the music festival. Each of them will play one of their representative songs
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摘要：Chen, Adrian (November 7, 2013). “Doge Is An Ac- tually Good Internet Meme. Wow.”. Gawker. Retrieved November 22, 2013. Doge is an Internet meme that
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摘要：One day, sailormoon girls are so delighted that they intend to research about palindromic strings. Operation contains two steps: First step: girls wil
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摘要：Andy the smart computer science student was attending an algorithms class when the professor asked the students a simple question, "Can you propose an
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摘要：For each prefix with length P of a given string S,if S[i]=S[i+P] for i in [0..SIZE(S)-p-1], then the prefix is a “period” of S. We want to all the per
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摘要：Give you n ( n < 10000) necklaces ,the length of necklace will not large than 100,tell me How many kinds of necklaces total have.(if two necklaces can
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摘要：Give you a string with length N, you can generate N strings by left shifts. For example let consider the string “SKYLONG”, we can generate seven strin
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摘要：Beside other services, ACM helps companies to clearly state their “corporate identity”, which includes company logo but also other signs, like tradema
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摘要：You are given a number of case-sensitive strings of alphabetic characters, find the largest string X, such that either X, or its inverse can be found
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摘要：It is well known that AekdyCoin is good at string problems as well as number theory problems. When given a string s, we can write down all the non-emp
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摘要：Homer: Marge, I just figured out a way to discover some of the talents we weren’t aware we had. Marge: Yeah, what is it? Homer: Take me for example. I
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摘要：The Genographic Project is a research partnership between IBM and The National Geographic Society that is analyzing DNA from hundreds of thousands of
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摘要：The little cat is so famous, that many couples tramp over hill and dale to Byteland, and asked the little cat to give names to their newly-born babies
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摘要：Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "abcdef". If we think of concate
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摘要：There is a string A. The length of A is less than 1,000,000. I rewrite it again and again. Then I got a new string: AAAAAA...... Now I cut it from two
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摘要：For each prefix of a given string S with N characters (each character has an ASCII code between 97 and 126, inclusive), we want to know whether the pr
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摘要：CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any surprise, there are only 99.9 yuan le
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摘要：The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote fr
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摘要：Given two sequences of numbers : a11, a22, ...... , aNN, and b11, b22, ...... , bMM (1 <= M <= 10000, 1 <= N <= 1000000). Your task is to find a numbe
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摘要：Japan plans to welcome the ACM ICPC World Finals and a lot of roads must be built for the venue. Japan is tall island with N cities on the East coast
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摘要：Suppose that the fourth generation mobile phone base stations in the Tampere area operate as follows. The area is divided into squares. The squares fo
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摘要：Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, j] = 0 (1 <=
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