三维树状数组模版.优化不动了. #include <set> #include <map> #include <stack> #include <cmath> #include <queue> #include <cstdio> #include <string> #include <vector> #include <iomanip> #include <cstring> #inclu…

题意:还是那篇论文里面讲到的,三维树状数组http://wenku.baidu.com/view/1e51750abb68a98271fefaa8画个立方体出来对照一下好想一点 #include<iostream> #include<cstdio> #include<cstring> #include <cmath> #include<stack> #include<vector> #include<map> #inclu…

Problem Description Given an N*N*N cube A, whose elements are either 0 or 1. A[i, j, k] means the number in the i-th row , j-th column and k-th layer. Initially we have A[i, j, k] = 0 (1 <= i, j, k <= N). We define two operations, 1: "Not"…

1470 最简单的三维树状数组 #include <iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<stdlib.h> using namespace std; #define lowbit(x) x&(-x) ][][],n; int getsum(int x,int y,int z) { ,i,j,g; ; i -= lowbit(i)…

涉及的知识点挺多,但是大多是套路 1.求曼哈顿距离的最值一般对所有情况进行讨论 2.三维树状数组用来求前缀最大值 /* 有一个三维坐标系(x,y,z),取值范围为[1,n],[1,m],[1,h],有两种操作 1.在三维坐标系上更新一个点(x1,y1,z1) 2.给定一个点(x2,y2,z2),问在坐标系上离该点Manhattan距离最短的点 即最小的 |x2-x1|+|y2-y1|+|z2-z1| 令 f=|x2-x1|+|y2-y1|+|z2-z1|,那么可以讨论去绝对值后f的八种情况 f0…

题意:给一个三维数组n*n*n,初始都为0,每次有两个操作: 1. 翻转(x1,y1,z1) -> (x2,y2,z2) 0. 查询A[x][y][z] (A为该数组) 解法:树状数组维护操作次数,一个数被操作偶数次则相当于没被操作. 每次更新时在8个位置更新: .相当于8个二进制数:000,001,010,011,100,101,110,111. (我是由二维推过来的) 其实不用有的为-1,直接1也行,因为反正会改变奇偶性. 代码: #include <iostream> #inclu…

Sort it Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4110    Accepted Submission(s): 2920 Problem Description You want to processe a sequence of n distinct integers by swapping two adjacent s…

Reference: http://blog.csdn.net/me4546/article/details/6333225 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=2838 题目大意:每头牛有个愤怒值,每次交换相邻两个数进行升序排序,$cost=val_{1}+val_{2}$,求$\min \sum cost_{i}$ 解题思路: 按输入顺序DP: 第i的值val的最小cost=当前数的逆序数个数*val+当前数的逆序数和 相当于每次只…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4046 When I wrote down this letter, you may have been on the airplane to U.S. We have known for 15 years, which has exceeded one-fifth of my whole life. I still remember the first time we went to the mov…

Inversion Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5497 Description 你有一个序列\{a_1,a_2,...,a_n\}{a​1​​,a​2​​,...,a​n​​},然后你可以删除一个长度为mm的连续子序列. 问如何删除才能使逆序对最少. Input 输入有多组数据, 第一行有一个整数TT表示测试数据的组数. 对于每组数据: 第一行包含2个…