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C. Looking for Order 题目连接: http://www.codeforces.com/contest/8/problem/C Description Girl Lena likes it when everything is in order, and looks for ord 阅读全文
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4500: 矩阵 题目连接: http://www.lydsy.com/JudgeOnline/problem.php?id=4500 Description 有一个n m的矩阵,初始每个格子的权值都为0,可以对矩阵执行两种操作: 1. 选择一行, 该行每个格子的权值加1或减1。 2. 选择一列, 阅读全文
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B. Obsession with Robots 题目连接: http://www.codeforces.com/contest/8/problem/B Description The whole world got obsessed with robots,and to keep pace wit 阅读全文