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High Performance Python 笔记(Python是门不错的语言,全栈程序员就用它好了!)
High Performance Python 目录 1 Understanding Performant Python2 Profiling3 Lists and Tuples4 Dictionaries and Sets5 Iterators and Generators6 Matrix and Vector Computation7 Compil...
分类:编程语言   时间:2014-10-08 11:03:25    阅读次数:448
matrix travers
Write a code to read and write a matrix in below given way.Note : no. indicates the sequence here.I/P1 2 34 5 67 8 9O/P 11 4 72 5 83 6 9for(i=0;i<row;...
分类:其他好文   时间:2014-10-08 08:09:24    阅读次数:194
leetcode——Rotate Image(二维数组顺时针旋转90度)
题目: You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 分析: 二维数...
分类:其他好文   时间:2014-10-07 16:44:13    阅读次数:311
POJ 2155 Matrix 二维树状数组
题目大意:有一个全零的矩阵,有两个操作。 1.修改(x1,y1)到(x2,y2)的数,使它们取异或。 2.查询(x,y)的状态。 思路:二维树状数组,区间修改,单点查询。 CODE: #include #include #include #include #define MAX 1010 using namespace std; int cases; i...
分类:其他好文   时间:2014-10-07 16:29:53    阅读次数:164
Search a 2D Matrix
Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted from l...
分类:其他好文   时间:2014-10-07 15:03:53    阅读次数:130
Set Matrix Zeroes
Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did you use extra space?A s...
分类:其他好文   时间:2014-10-07 12:03:03    阅读次数:231
UVA11992 - Fast Matrix Operations ( 线段树 + 区间修改 + 好题 )
UVA11992 - Fast Matrix Operations ( 线段树 + 区间修改 + 好题 )这是大白书上的例题,一直放着没有去A掉,这是一道线段树区间修改的好题。线段树中需要维护三个域 ,max, min, sum,也就是区间最大值,最小值,区间和题目大意:r 行 c 列 的全0矩阵,...
分类:其他好文   时间:2014-10-05 15:31:38    阅读次数:192
R: Hierarchical Cluster 层次聚类
构造数据: > dataset = matrix(c(1,2, + 1.2,2, + 8,9, + 0.9,1.8, + 7,10, + 8.8,9.2), nrow=6, byrow=T) > dataset [,1] [,2] [1,] 1.0 2.0 [2,] 1.2 2.0 [3,] 8.0 9.0 [4,] 0.9 1.8 [5,] 7.0 1...
分类:其他好文   时间:2014-10-05 15:27:28    阅读次数:373
R:Kmeans
例如要把一组数据分成两个簇: > dataset = matrix(c(1,2, + 1.2,2, + 8,9, + 0.9,1.8, + 7,10, + 8.8,9.2), nrow=6, byrow=T) > dataset [,1] [,2] [1,] 1.0 2.0 [2,] 1.2 2.0 [3,] 8.0 9.0 [4,] 0....
分类:其他好文   时间:2014-10-05 12:29:28    阅读次数:221
POJ3422 Kaka's Matrix Travels 【最大费用最大流】
Kaka's Matrix Travels Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8006   Accepted: 3204 Description On an N × N chessboard with a non-negative number i...
分类:其他好文   时间:2014-10-05 11:40:38    阅读次数:281
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