SimHash是什么 SimHash是Google在2007年发表的论文<Detecting Near-Duplicates for Web Crawling >中提到的一种指纹生成算法或者叫指纹提取算法,被Google广泛应用在亿级的网页去重的Job中,作为locality sensitive hash(局部敏感哈希)的一种,其主要思想是降维,什么是降维? 举个通俗点的例子,一篇若干数量的文本内容,经过simhash降维后,可能仅仅得到一个长度为32或64位的二进制由01组成的字符串,这一点
Halloween treats Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 6631 Accepted: 2448 Special Judge Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets
题目链接:http://codeforces.com/contest/618/problem/F 题目: 题目大意: 有两个大小为 N 的可重集 A, B, 每个元素都在 1 到 N 之间. 分别找出 A 和 B 的一个子集, 使得这两个子集元素之和相等. 分别输出集合A和集合B的子集的个数以及子集中元素在原集合中的位置 N ≤ $10^6$ 题解: 首先我们证明一个结论,存在一组方案,满足两个子集在A中和在B中都是连续的一段 把两个集合看成两个数组,分别计算出前缀和sa,sb 对于每个i(0<
Factory One industrial factory is reforming working plan. The director suggested to set a mythical detail production norm. If at the beginning of the day there were x details in the factory storage, then by the end of the day the factory has to produ
http://acm.hdu.edu.cn/showproblem.php?pid=3303 Harmony Forever Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 813 Accepted Submission(s): 222 Problem Description We believe that every inh
Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6452 Accepted: 2809 Special Judge Description The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000. This numbers a
题目传送:http://acm.hdu.edu.cn/showproblem.php?pid=1808 Problem Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets on that day, no matter how many children call on him, s