zxa and xor 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5683 Description zxa had a great interest in exclusive disjunction(i.e. XOR) recently, therefore he took out a non-negative integer sequence a1,a2,⋯,an of length n. zxa thought only doing th…

zxa and xor Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description zxa had a great interest in exclusive disjunction(i.e. XOR) recently, therefore he took out a non-negative integer sequence a1,a2,⋯,a…

Difference of Clustering HDU - 5486 题意:有n个实体,新旧两种聚类算法,每种算法有很多聚类,在同一算法里,一个实体只属于一个聚类,然后有以下三种模式. 第一种分散,新算法的某几个聚类是旧算法某个聚类的真子集. 第二种聚合,旧算法的某几个聚类是新算法某个聚类的真子集. 第三种1:1,新算法的某个聚类跟旧算法某个聚类相同. 问每种模式存在多少个? 实路上很明了,就是模拟,而且每个实体最多遍历到一次,所以时间上不用担心. 先把聚类的编号hash,把每个实体分配到相应…

题目链接: zxa and xor Time Limit: 16000/8000 MS (Java/Others)     Memory Limit: 65536/65536 K (Java/Others) Problem Description   zxa had a great interest in exclusive disjunction(i.e. XOR) recently, therefore he took out a non-negative integer sequence …

http://www.bnuoj.com/bnuoj/problem_show.php?pid=20832 [题意]: 给你一串字符串,求一个ST(0<ST<=10000),对字符串中字符分别加上(ST-'A'),然后得到的数组分别连起来组成字符串,相邻两个字符相加,取各位数,赋值到下一行,每行讲减少一个字符,直到出现3个字符为100时,输出这时候的ST [题解]: 完全暴力模拟[code]: #include <iostream> #include <stdio.h>…

Counterfeit Dollar Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 35774   Accepted: 11390 Description Sally Jones has a dozen Voyageur silver dollars. However, only eleven of the coins are true silver dollars; one coin is counterfeit ev…

hdu1006 标签(空格分隔): 暴力枚举 好久没有打题了,退队了有好几个月了,从心底不依赖那个人了,原来以为的爱情戏原来都只是我的独角戏.之前的我有时候好希望有个人出现,告诉自己去哪里,做什么,哪种仅仅是渴望被爱的感觉都很美好,大概是因为离开了acm也不再依赖他所以现在我自己告诉自己,自己要去哪里,做什么,突然感觉很踏实,也不那么累了.现在我想把之前没有做好的做好,虽然我已经失去了最好的时机,但还是要在最忙的时间里抽出来做一些曾经有所遗憾的事情. 不多说了,上题! 开始推了半天公式,发现这个…

UVA.12716 GCD XOR (暴力枚举 数论GCD) 题意分析 题意比较简单,求[1,n]范围内的整数队a,b(a<=b)的个数,使得 gcd(a,b) = a XOR b. 前置技能 XOR的性质 GCD 由于题目只给出一个n,我们要求对数,能做的也始终暴力枚举a,b,这样就有n^2的复杂度,由于n很大,根本过不了. 于是我们就想用到其中一些性质,如XOR 与GCD,不妨假设 a xor b = c,并且根据题意还知道, gcd(a,b) = c,也就说明c一定是a的因子,所以在枚举的…

其实和昨天写的那道水题是一样的,注意爆LL $1<=n,k<=1e9$,$\sum\limits_{i=1}^{n}(k \mod i) = nk - \sum\limits_{i=1}^{min(n,k)}\lfloor\frac{k}{i}\rfloor i$ /** @Date : 2017-09-21 19:55:31 * @FileName: HDU 2620 分块底数优化 暴力.cpp * @Platform: Windows * @Author : Lweleth (SoungE…

P2 : Heshen's Account Book Time Limit:1000ms Case Time Limit:1000ms Memory Limit:512MB Description Heshen was an official of the Qing dynasty. He made a fortune which could be comparable to a whole country's wealth by corruption. So he was known as t…