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Problem Description This summer, ZXyang became so tired when doing the problems of Multi-University contests. So he decided to attend the Unified Nati 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11255/E 来源：牛客网 题目描述 Bob has a tree with nn nodes and the weight of i-th node is wiwi. But Bob forgot w1...nw1.. 阅读全文
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Problem Description Pixels in a digital picture can be represented with three integers (R,G,B) in the range 0 to 255 that indicate the intensity of th 阅读全文
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Problem Description Alice and Bob are playing a game. In this game, there are n straight lines on the 2D plane. Alice will select exactly k straight l 阅读全文
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Problem Description Chenjb is struggling with data stucture now. He is trying to solve a problem using segment tree. Chenjb is a freshman in programmi 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11255/F 来源：牛客网 题目描述 Alice and Bob are playing a game. At the beginning, there is an undirected graph GG with nn 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11255/I 来源：牛客网 题目描述 For a sequence t1...nt1...n, we define the weight of it is the number of pairs (i,j)(i,j) s 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11255/C 来源：牛客网 题目描述 Let LCS(s1,s2)LCS(s1,s2) denote the length of the longest common subsequence (not necessary 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11255/J 来源：牛客网 题目描述 Bob has an n×mn×m matrix WW. This matrix is very special, It's calculated by two sequences 阅读全文
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链接：https://ac.nowcoder.com/acm/contest/11254/B 来源：牛客网 题目描述 Goodeat has a white chessboard with n rows and m columns. Each grid (i, j) has a weight c(i 阅读全文