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C__4
The only information passed from difeq to solvde is the matrix of derivatives
- 2012-08-23 22:23:00下载
- 积分:1
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Ascii-Char
ascii char conversion
- 2011-12-19 01:36:48下载
- 积分:1
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mie
mie散射计算,包括吸收系数,散射系数等。所需参数为m,x(mie scattering coefficients. The required parameters for m, x)
- 2012-09-06 13:43:24下载
- 积分:1
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Sllcorrelation
分析两时间序列之间的超前和之后关系,计算滞时长度,多用于水文气象方面分析研究(Analysis ahead of and after the relationship between the two time series, calculating the lag length, used for the analysis of hydrometeorological)
- 2020-07-10 10:08:55下载
- 积分:1
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11087 统计逆序对
说明: Description
设a[0…n-1]是一个包含n个数的数组,若在ia[j],则称(i, j)为a数组的一个逆序对(inversion)。
比如 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, 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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1.21b
分数阶滑模工具箱,可用于解决阶次比较低的时候(fractional order sliding mode )
- 2016-10-10 09:37:28下载
- 积分:1
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Untitled2
可以用最小二乘法来提取趋势项。在MATLAB中可利用它的函数来计算(Least squares method can be used to extract the trend items. It can be used in MATLAB to calculate the function)
- 2011-07-29 19:02:04下载
- 积分:1
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TDMAsolver.f90
TDMA solver for tridiagonal matrix
- 2010-09-15 10:54:16下载
- 积分:1
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shuangbianfuliyebianhuan
快速傅立叶变换,双边傅里叶变换的LabVIEW程序(Fast Fu Liye transform, bilateral Fourier transform of the LabVIEW program)
- 2014-12-04 17:22:45下载
- 积分:1
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FDTD3D_PEC
使用matlab编写的时域有限差分法,pec边界的光子晶体。(Written using matlab finite difference time domain method, pec boundary of the photonic crystal.)
- 2011-10-27 14:11:40下载
- 积分:1