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OpenSees1.0
经典的可编程添加模块的面向对象的有限元程序代码(C++ code for OOFEM based on multi-systems)
- 2018-05-02 19:45:18下载
- 积分:1
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bubble-dynamic-mesh
气泡根据内外压力差变化的动网格。。。。。。(bubble dynamic mesh )
- 2014-02-10 15:52:37下载
- 积分:1
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PQ decomposition method
进行PQ分解,计算电力系统潮流的有效方法,应用广泛(PQ decomposition is an effective method for calculating power flow in power system.)
- 2019-04-23 21:34:16下载
- 积分:1
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daoxian
导线网平差程序,参数约束,通过设定不同的PX达到经典自由网,普通自由网,拟稳平差效果,算例(Wire net adjustment procedures, parameters, constraints, and examples)
- 2012-04-13 10:36:43下载
- 积分:1
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MeshFree
说明: Analysis of 2D structure using Mesh Free Method...
- 2020-04-17 06:30:22下载
- 积分:1
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FFT
FFT with fix point 2*N
- 2013-10-06 15:38:38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
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HeatTransfer_1D
求解一维热传导方程,格式包括FTCS、BTCS、CNCS三种差分格式(solve one dimension heat transfer equation. )
- 2021-04-17 16:48:53下载
- 积分:1
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SplineCSharp
C#编写的三次样条插值函数,TSS法求解对角矩阵方程函数,插值点函数值计算函数。(prepared by the cubic spline interpolation function, TSS method diagonal matrix equation function, interpolation function point value function.)
- 2007-05-27 15:24:35下载
- 积分:1
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The-UDF-for-phase-change-of-water
Fluent 中短语模拟水的受热蒸发相变的UDF程序代码(the UDF for phase change of water)
- 2014-01-06 19:38:21下载
- 积分:1