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3DForce
Fortran编写的用来计算集中力在三维半空间弹性体中下表面应力的程序。(Written in Fortran is used to calculate the stress concentration at the surface in three-dimensional space of half an elastomer program.)
- 2016-10-10 09:35:53下载
- 积分:1
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MCM
深入浅出蒙特卡洛方法,蒙特卡洛仿真高级学习文档资料,提供深入浅出的学习帮助(Simple terms Monte Carlo method, Monte Carlo simulation of advanced study and documentation, providing simple terms of learning to help)
- 2021-03-02 19:29:33下载
- 积分:1
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GUI-matlab-music-impl
gui of music algorithm implemented in matlab
- 2011-04-20 20:09:41下载
- 积分:1
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096172
应用方便的OrbMath数学运算库,适用于多种语言()
- 2018-04-05 16:13:55下载
- 积分:1
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sod ausm
sod problem solved by ausm format
- 2018-11-12 23:13:50下载
- 积分:1
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jifen
各种数值积分,龙贝格积分。反常积分。高斯积分。三重积分。(Various numerical integration Romberg integration. Improper integrals. Gaussian integral. Triple integral.)
- 2012-12-02 15:54:40下载
- 积分:1
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lorenzeq
用Wolf法计算lorenzeq混沌系统的Lyapunov指数谱。改变混沌系统参数,计算准确,运行let.m文件,即可计算Lyapunov指数谱
(Wolf Law lorenzeq chaotic systems Lyapunov exponent spectrum. Change the chaotic system parameters, calculated accurate, run let.m file, you can calculate the Lyapunov exponent spectrum)
- 2012-11-08 21:13:43下载
- 积分:1
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CPA
啁啾脉冲放大中的多通放大进行数值计算,并计算其横截面光强分布。可以用于进一步计算和确定系统参数(Chirped pulse amplification of multiple amplification through numerical calculation, and calculates the cross-sectional intensity distribution. And can be used in further calculations to determine the system parameters. Ti:saphirre amplification.multipass)
- 2014-11-18 23:23:21下载
- 积分:1
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test
随机数的产生,枚举嵌套算法求解一元多次方程。按批量处理。(The generation of random Numbers, nested enumeration algorithm monadic equation according to the batch processing for many times)
- 2013-05-18 08:42:15下载
- 积分:1
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11087 统计逆序对
Description
设a[0…n-1]是一个包含n个数的数组,若在i<j的情况下,有a[i]>a[j],则称(i, j)为a数组的一个逆序对(inversion)。
比如 <2,3,8,6,1> 有5个逆序对。请采用类似“合并排序算法”的分治思路以O(nlogn)的效率来实现逆序对的统计。
一个n个元素序列的逆序对个数由三部分构成:
(1)它的左半部分逆序对的个数,(2)加上右半部分逆序对的个数,(3)再加上左半部分元素大于右半部分元素的数量。
其中前两部分(1)和(2)由递归来实现。要保证算法最后效率O(nlogn),第三部分(3)应该如何实现?
此题请勿采用O(n^2)的简单枚举算法来实现。
并思考如下问题:
(1)怎样的数组含有最多的逆序对?最多的又是多少个呢?
(2)插入排序的运行时间和数组中逆序对的个数有关系吗?什么关系?
输入格式
第一行:n,表示接下来要输入n个元素,n不超过10000。
第二行:n个元素序列。
输出格式
逆序对的个数。
输入样例
5
2 3 8 6 1
输出样例
5(Set a[0... N-1] is a n array containing n numbers. If there is a [i] > a [j] i n the case of I < j, then (i, j) is a n inversion pair of a array.
For example, <2,3,8,6,1> has five reverse pairs. Please use the idea of "merge sorting algorithm" to achieve the statistics of inverse pairs with O (nlogn) efficiency.
The number of inverse pairs of a sequence of n elements consists of three parts:
(1) The number of reverse pairs in the left half, (2) the number of reverse pairs in the right half, (3) the number of elements in the left half is greater than that in the right half.
The first two parts (1) and (2) are implemented by recursion. To ensure the final efficiency of the algorithm O (nlogn), how should the third part (3) be implemented?
Do not use O (n ^ 2) simple enumeration algorithm to solve this problem.)
- 2019-01-07 23:52:06下载
- 积分:1