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ykb
实对称矩阵特征值与特征向量的雅克比法,ap为是对称矩阵,vp返回特征向量(Real Symmetric Matrix Eigenvalues and Eigenvectors of the Jacobian method, ap is a symmetric matrix, vp return eigenvector)
- 2020-08-03 17:18:34下载
- 积分:1
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PolyFit
PoleyFitqw曲3线3拟w合类q库
PolewyFitqw曲w线拟w合t类库
PoelywFitq曲w线拟t合类t库
PoelyFtitq曲er线rw合类t库
PolywrFitq曲q线拟wt合t类库(Pwoly33FiwtPoleetPwolyFit555PolywFit)
- 2020-06-25 11:00:01下载
- 积分:1
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c_and_f
c/C++跟fortran语言之间的一些转换(c/C fortran language with the conversion between)
- 2007-05-31 13:46:32下载
- 积分:1
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PRequation
工程领域,PR方程代码.用于计算混合工质性质。(PR equation code)
- 2020-09-04 16:58:09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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newton
牛顿插值算法,利用数组存储均差表,一步步迭代求得插值(Newton interpolation algorithm, the use of array stores are differential gauge, step by step, iterative get interpolation
)
- 2012-05-06 15:22:52下载
- 积分:1
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Nnnrrfxxfce
牛顿法计算方程,能计算非线性方程/方程程组,有需要的能试试,主要是数学方法的实现
(Newton method to calculate the equation to calculate the nonlinear equation/equation of equations, needs to try, mainly the implementation of the mathematical methods)
- 2012-08-20 07:22:55下载
- 积分:1
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juzhen
复数矩阵的运算、包括乘、除、加、减、求逆等(Including all operations of the matrix)
- 2017-07-22 14:21:04下载
- 积分:1
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FEMC
这里包含了有限元法的一本书籍,和有限元法的C++代码。希望对各位有所帮助(This contains a finite element method books, and the finite element method of C++ code. I hope to help you)
- 2016-06-02 09:20:34下载
- 积分:1
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shuzhijisuan
数值计算实例,主要有LU分解,龙格库塔法,高斯分解法,欧拉法,曲线拟合,曲线插值(Numerical example)
- 2014-01-03 10:38:53下载
- 积分:1