北大ACM试题poj 第3072题源码，很好的代码，希望对搞ACM的同学有帮助...

应用背景霍夫曼树-C++源码实现：哈夫曼树是带权路径长度最短的树，权值较大的结点离根较近。关键技术给定n个权值作为n的叶子结点，构造一棵二叉树，若带权路径长度达到最小，称这样的二叉树为最优二叉树，也称为哈夫曼树(Huffman Tree)。

Matlab实现的CFD算法-Matlab CFD algorithms

牛顿差商与差分计算函数，用C语言实现，设计了多个子函数，代码略长，可供参考-Newton" s difference quotient and the difference calculation functions, using C language implementation, design a number of subroutine, the code slightly longer available for reference

用递归算法求解把m个苹果放入n个盘子总共有多少种放法。很简单的程序，从屏幕输入两个参数， 一个为苹果个数，第二个为盘子个数。然后enter返回结果。

《算法和复杂度》（英文版）-"algorithms and complexity" (English version)

这是用于图像去噪方法的代码。在这里我使用高斯滤波图像去噪。在一些医学图像应用程序中，去噪后的图像是非常重要的。

应用背景In generated networks, selecting one node as source and some nodes as receivers in random (single source multicast network), we make performance test for network coding based multicast route algorithm (we put forward it ourselves, corresponding to high multicast rate and low multicast rate), shortest path distribution tree route algorithm (DIJKSTRA algorithm) and Maximum-rate distribution tree route algorithm (PRIM algorithm), respectively. 关键技术 In this program, two things have been done: (1) generate random topologies (2)performance test。   network coding cap:     5.0000  dijk cap:     5.0000  prim cap:     5.0000  network coding res1:     0.0000--res2:    12.0000  dijk res:    14.0000  prim res:    14.0000  average degree:     2.

龙格-库塔法是工程中常用的求解微分方程的一种方法.而且具有四阶精度,因此应用很广泛.改程序给出了其源代码.-Runge- Kutta method is commonly used in engineering solving a differential equation methods. But with four bands precision, it is widely used. Changed its procedures is the source code.

% Syntax: x=sirt(A,b,tolx,maxiter) % % Inputs: %       A   = Constraint matrix.     A=一个约束矩阵 %       b   = right hand side.       b=右边  %    tolx   = Terminate when the relative diff between   tolx=终止时，两次迭代之间的相对差异小于tolx。 %             two iterations is less than tolx. % maxiter   = Stop after maxiter iterations.         maxiter=停止迭代后 % % Outputs: 请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

从.txt文件中读取数据，并对数据进行傅里叶压缩和变换的操作。-From. Txt file to read data, and data compression and Fourier transform operation.