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B. Jumping Jack 题目连接： http://www.codeforces.com/contest/11/problem/B Description Jack is working on his jumping skills recently. Currently he's locate 阅读全文
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A. Increasing Sequence 题目连接： http://www.codeforces.com/contest/11/problem/A Description A sequence a0, a1, ..., at 1 is called increasing if ai 1 usin 阅读全文
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3504: [Cqoi2014]危桥 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=3504 Description Alice和Bob居住在一个由N座岛屿组成的国家，岛屿被编号为0到N 1。某些岛屿之间有桥相连，桥上的道路是双 向的，但 阅读全文
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4517: [Sdoi2016]排列计数 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=4517 Description 求有多少种长度为 n 的序列 A，满足以下条件： 1 ~ n 这 n 个数在序列中各出现了一次 若第 i 个数 A[ 阅读全文
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D. LCIS 题目连接： http://www.codeforces.com/contest/10/problem/D Description This problem differs from one which was on the online contest. The sequence a 阅读全文
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C. Digital Root 题目连接： http://www.codeforces.com/contest/10/problem/C Description Not long ago Billy came across such a problem, where there were given 阅读全文
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B. Cinema Cashier 题目连接： http://www.codeforces.com/contest/10/problem/B Description All cinema halls in Berland are rectangles with K rows of K seats e 阅读全文