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Euler is a well-known matematician, and, among many other things, he discovered that the formula n 2 + n + 41 produces a prime for 0 ≤ n < 40. For n = 阅读全文
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Description The company "21st Century Fruits" has specialized in creating new sorts of fruits by transferring genes from one fruit into the genome of 阅读全文
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Description ?? gets an sequence S with n intergers(0 < n <= 100000,0<= S[i] <= 1000000).?? has a magic so that he can change 0 to any interger(He does 阅读全文
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Problem Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = <x1, x2, 阅读全文
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Description Peter has a sequence and he define a function on the sequence -- , where is the length of the longest increasing subsequence ending with . 阅读全文
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Description There is a pile of n wooden sticks. The length and weight of each stick are known in advance. The sticks are to be processed by a woodwork 阅读全文