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hdu 5569 matrix dp
matrixTime Limit: 20 SecMemory Limit: 256 MB题目连接http://acm.hdu.edu.cn/showproblem.php?pid=5569DescriptionGiven a matrix with n rows and m columns ( n+...
分类:其他好文   时间:2015-11-22 12:39:36    阅读次数:143
View以自身中心旋转的代码解惑
matrix.preTranslate(-centerX, -centerY);matrix.postTranslate(centerX, centerY);经常在中心旋转的应用中看到这段代码.preTranslate是指在matrix旋转之前平移,postTranslate是指在matrix旋转之...
分类:其他好文   时间:2015-11-22 12:30:48    阅读次数:178
HDU5569/BestCoder Round #63 (div.2) C.matrix DP
matrixProblem DescriptionGiven a matrix withnrows andmcolumns (n+mis an odd number ), at first , you begin with the number at top-left corner (1,1) an...
分类:其他好文   时间:2015-11-22 00:17:02    阅读次数:211
hdu 5569 matrix(简单dp)
Problem DescriptionGiven a matrix with n rows and m columns ( n+m is an odd number ), at first , you begin with the number at top-left corner (1,1) an...
分类:其他好文   时间:2015-11-21 22:35:06    阅读次数:196
LeetCode -- Search a 2D Matrix II
LeetCode -- Search a 2D Matrix II...
分类:其他好文   时间:2015-11-21 11:54:15    阅读次数:169
因子分析 (Factor Analysis Sharp)
In my understanding, factor analysis is a method developed to avoid the mass estimation of the variance-covariance matrix when doing Markowitz Allocat...
分类:其他好文   时间:2015-11-20 21:43:19    阅读次数:194
POJ - 3685 Matrix
二分kth,答案满足的条件为:m≤ 小于等于x的值数cntx。x和cntx单调不减,随着x增大,条件成立可表示为:0001111。本地打一个小型的表可以发现列编号j固定时候,目标函数f(i,j)似乎具有单调性。变形,f(i,j) = (i+100000+j)*i + j2 -100000,可以看出确...
分类:其他好文   时间:2015-11-20 20:03:09    阅读次数:179
Search a 2D Matrix
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted f...
分类:其他好文   时间:2015-11-20 10:35:50    阅读次数:129
LeetCode OJ:Maximal Square(最大矩形)
Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area.For example, given the following matr...
分类:其他好文   时间:2015-11-19 00:33:41    阅读次数:144
因子分析 (Factor Analysis Sharp)
In my understanding, factor analysis is a method developed to avoid the mass estimation of the variance-covariance matrix when doing Markowitz Allocat...
分类:其他好文   时间:2015-11-18 00:41:43    阅读次数:159
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