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A. Plus and Square Root 题目连接： http://codeforces.com/contest/715/problem/A Description ZS the Coder is playing a game. There is a number displayed on t 阅读全文
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C. Sonya and Problem Wihtout a Legend 题目连接： http://codeforces.com/contest/713/problem/C Description Sonya was unable to think of a story for this prob 阅读全文
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D. Animals and Puzzle 题目连接： http://codeforces.com/contest/713/problem/D Description Owl Sonya gave a huge lake puzzle of size n × m to hedgehog Filya 阅读全文
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4706: B君的多边形 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=4706 Description 有一个正n多边形，我们要连接一些对角线，把这个多边形分成若干个区域。要求连接的对角线不能相交，每个点 可以连出也可以不连出对角线。（ 阅读全文
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Tree Cutting 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5909 Description Byteasar has a tree T with n vertices conveniently labeled with 1,2,..., 阅读全文