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Floating-point-complex-radix-2-decimation-in-time-
浮点复数基2时分FFT完成适当的FFT,输出改写输入缓冲器。(floating-point complex FFT-based two hours to complete the FFT output rewritten input buffer.)
- 2006-08-07 14:19:25下载
- 积分:1
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K2
说明: 贝叶斯网络学习算法——k2算法,包括对贝叶斯网络结构的学习,最后生成网络(Bayesian network learning algorithm- k2 algorithms, including Bayesian network structure learning, the last generation network)
- 2009-09-20 21:46:52下载
- 积分:1
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C-means
说明: C-means in 2 types. C=2
- 2020-06-16 02:00:01下载
- 积分:1
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Simple
求解速度压力耦合的Simple半隐式迭代方法,该方法在计算流体动力学中应用极为广泛(To solve the pressure velocity coupling Simple semi-implicit iterative method, the method applied in the Computational Fluid Dynamics an extremely wide range of)
- 2021-01-05 09:08:54下载
- 积分:1
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SVMcgForRegress
支持向量机中的支持向量回归函数对数据进行预测(Support Vector Regression Function in Support Vector Machine to Predict Data)
- 2019-05-12 16:42:10下载
- 积分:1
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C_P
恒温减压沸腾UDF,一个基于压力计算的水蒸发UDF程序,请大家探讨一下(boiling udf of costant T and decreasing P)
- 2011-12-19 11:41:40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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AKMC-_TIS_Solute-
用于研究粒子在晶体材料内输运性质,计算扩散系数的动力学蒙特卡洛程序(
Kinetic Monte Carlo program is used to study particle transport properties in crystalline materials, the calculation of the diffusion coefficient
Kinetic Monte Carlo program is used to study particle transport properties in crystalline materials, the calculation of the diffusion coefficient)
- 2016-05-06 18:08:16下载
- 积分:1
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include
主要是关于一些数值计算中所要用到的头文件,希望对大家有所帮助(Mainly on the number of numerical calculation by the use of header files, I hope all of you to help)
- 2008-01-07 21:51:49下载
- 积分:1
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Paraboloidfitting
基于最小二乘法的抛物面拟合,内含有模拟数据和真是数据供参考。(Contains analog data based on the method of least squares parabolic fitting, and is really data for reference.)
- 2012-11-29 09:45:29下载
- 积分:1