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zxecf
一个集交互式和命令式于一体的程序,采用最小二乘法进行曲线的拟合(A set of interactive and command-style in one program, using least-squares curve fitting method)
- 2009-12-15 10:49:31下载
- 积分:1
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klman
卡尔曼滤波的MATLAB程序,卡尔曼滤波的MATLAB程序(MATLAB Kalman filter procedure, the MATLAB Kalman filter process)
- 2008-05-25 14:44:19下载
- 积分:1
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kirchhoff--scattering
计算基尔霍夫近似下镜面与非镜面的反射系数,同时得到距离散射点2米的接收功率(Calculation Kirchhoff approximation of specular and non-specular reflection coefficient, while the reception power obtained from the scattering points of 2 meters)
- 2013-03-28 11:22:07下载
- 积分:1
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jifen
分别用梯形法和矩形法求定积分,附加应用实例(, Respectively, with the trapezoidal method and the rectangle method to find definite integrals, additional application examples)
- 2012-11-28 22:16:59下载
- 积分:1
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niulachaoliu(hanfengdianchang)
IEEE14节点接入一个风电场的牛拉法潮流计算MATLAB程序(含线路和风电机组的参数),里面有注解,方便理解。(IEEE14 Nodes System connected to a wind farm cattle MATLAB rafa power flow calculation (including lines and the parameters of the wind turbines), there are annotations, easy to understand)
- 2017-05-05 17:22:11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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SM3
python编写SM3密码杂凑算法,测试字符串abc, abcd*16(written in python SM3 password hash algorithm, the test string abc, abcd.* 16)
- 2012-08-04 15:34:55下载
- 积分:1
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udf
计算fluent相变的udf模型,包括气相到液相,液相到气相的双向传递。(Calculate the udf model of fluent phase transition)
- 2020-11-21 15:09:35下载
- 积分:1
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Chemkin2
CHEMKIN 2 源代码,使用Fortran语言编写,需要的可以下载(CHEMKIN 2 source code, written in Fortran, need can be downloaded)
- 2021-03-18 10:19:20下载
- 积分:1
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sola_vof
SOLA-VOF program solving Navier-Stokes equation with free surface by volume of fluid method
- 2021-01-17 23:18:50下载
- 积分:1