题意: 给一些无序的数字,求解一个矩阵,使得矩阵的每一个元素都是行和列标志数的gcd,输出行标志数. 首先对数字进行排序.复杂度n*log(n^2). 这题的证明有官方的英文题解==在这直接贴英文题解... 这题我事后自己反思了一下,其实思路并不难,而且一开始自己思考的方向也对. 问题出在两方面: 1.对平衡树等数据结构的应用还是缺乏理解的.遇到问题不知道可以用这些方法来解决. 2.思考缺乏理性和条理.没有按部就班得思考. Let the answer be a1 ≤ a2 ≤ ... ≤ an
E. Short Code time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Arkady's code contains nn variables. Each variable has a unique name consisting of lowercase English letters only. One day Arka
Fence Repair Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 53106 Accepted: 17508 Description Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs N (1 ≤ N ≤ 20,000)
Knights of a Polygonal Table time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Unlike Knights of a Round Table, Knights of a Polygonal Table deprived of nobility and happy to kill each other.
Welcome Party Time Limit: 4000/4000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 875 Accepted Submission(s): 194 Problem Description The annual welcome party of the Department of Computer Science and Technolo