树形DP / 泛化物品的背包...可以去看09年徐持衡论文<浅谈几类背包问题> The most powerful force Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 727    Accepted Submission(s): 182 Problem Description The leaders of AC country…

D. Powerful array time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output An array of positive integers a1, a2, ..., an is given. Let us consider its arbitrary subarray al, al + 1..., ar, where 1 …

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4150 Powerful Incantation Description Some dangerous Witches invaded the garden city! As a righteous magician, james0zan want to find the most powerful incantation so he can beat those dangerous witches…

莫队算法就是优化的暴力算法.莫队算法是要把询问先按左端点属于的块排序,再按右端点排序.只是预先知道了所有的询问.可以合理的组织计算每个询问的顺序以此来降低复杂度. D. Powerful array 典型的莫队算法题 #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <string&g…

10+ powerful debugging tricks with Visual Studio Original link : http://www.codeproject.com/Articles/359801/plus-powerful-debugging-tricks-with-Visual-Studi…

题目链接:zoj 3471 Most Powerful  作者:jostree 转载请说明出处 很经典的状态dp,使用i的二进制位表示粒子的状态,0表示存在,1表示不存在.dp[i]表示在状态i的情况下能够释放的最大的能量,注意自身不能够发生碰撞.例如4个粒子的状态1100表示第0个和第1个粒子不存在,第2.3个粒子存在则可以转移到状态1110或1101.最终遍历只剩下一颗粒子的情况下的所有能量中的最大值. 代码如下: #include <cstdio> #include <cstdli…

Recently, researchers on Mars have discovered N powerful atoms. All of them are different. These atoms have some properties. When two of these atoms collide, one of them disappears and a lot of power is produced. Researchers know the way every two at…

codefroce D. Powerful array[初识块状数组] 由于是初始所以,仅仅能先用别人的分析.囧... 题目: 给定一个数列:A1, A2,--,An,定义Ks为区间(l,r)中s出现的次数. t个查询,每一个查询l,r,对区间内全部a[i],求sigma(K^2*a[i]) 离线+分块 将n个数分成sqrt(n)块. 对全部询问进行排序,排序标准: 1. Q[i].left /block_size < Q[j].left / block_size (块号优先排序) 2. 假设1…

D. Powerful array 题意 给定一个数列:a[i] (1<= i <= n) K[j]表示 在区间 [l,r]中j出现的次数.有t个查询,每个查询l,r,对区间内所有a[i],求sigma(K[a[i]] * K[a[i]] * a[i]). 分析 首先将区间分块,每块sqrt(n)个,先读入所有的查询,对查询进行排序:先按块序号从小到大,再按右端点的值从小大到排序. 按顺序读入查询,动态变更区间,以及区间的值.如果某个点出现了 x 次,出现 x + 1 次时,区间内增加(2 *…

1 About DB Query Analyzer DB Query Analyzer is presented by Master Genfeng,Ma from Chinese Mainland. It has English version named 'DB Query Analyzer'and Simplified Chinese version named  . DB Query Analyzer is one of the few excellent Client Tools in…