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A. Crazy Town 题目连接: http://codeforces.com/contest/498/problem/A Description Crazy Town is a plane on which there are n infinite line roads. Each road 阅读全文
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Abelian Period 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5908 Description Let S be a number string, and occ(S,x) means the times that number x o 阅读全文
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Find Q 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5907 Description Byteasar is addicted to the English letter 'q'. Now he comes across a string S 阅读全文
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D. Generating Sets 题目连接: http://codeforces.com/contest/722/problem/D Description You are given a set Y of n distinct positive integers y1, y2, ..., yn 阅读全文
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C. Destroying Array 题目连接: http://codeforces.com/contest/722/problem/C Description You are given an array consisting of n non negative integers a1, a2, 阅读全文
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B. Verse Pattern 题目连接: http://codeforces.com/contest/722/problem/B Description You are given a text consisting of n lines. Each line contains some spa 阅读全文
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A. Broken Clock 题目连接: http://codeforces.com/contest/722/problem/A Description You are given a broken clock. You know, that it is supposed to show time 阅读全文