Eswai的专栏

445. Add Two Numbers IIProblem descriptionYou are given two linked lists representing two non-negative numbers. The most significant digit comes first and each of their nodes contain a single digit. Ad

OpenCV中的文件存取问题描述在做图像处理等工作时，经常需要对矩阵Mat等各类对象进行存取，那么在OpenCV中有没有合适的方法呢？解决方案OpenCV中保存图片的最常用方式是imwrite()，但是只能将矩阵按8位/24位图片格式保存。如果需要保存浮点数据，要使用FileStorage类，将矩阵保存为XML/YAML文件。示例如下：Mat I;/* Process of Mat I...*/

C++ ERROR : base operand of ‘->’ has non-pointer type ‘std::pair< int, int>’ 的解释问题描述出错代码（截取部分）:list<pair<int,int>> cachelist;unordered_map<int,list<pair<int,int>>::iterator> map;void put(int key, int

Leetcode: 49. Group Anagrams 对颠倒字符串分组作者: Eswai (eswai@foxmail.com) 优快云: blog.youkuaiyun.com/eswai问题描述Given an array of strings, group anagrams together.Example:, Given: [“eat”, “tea”, “tan”, “ate”, “na

Leetcode: 309. Best Time to Buy and Sell Stock with Cooldown 有冷却机制的炒股问题-作者: Eswai (eswai@foxmail.com) 利用有限状态自动机解决。

Leetcode: 18. 4Sum 四数之和问题描述Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of targe

Leetcode: 15. 3Sum 三数之和问题描述Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Note: The solution set m

Leetcode: 441. Arranging Coins排列硬币问题描述You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins.Given n, find the total number of full stair

问题描述OpenCV 2.0 中的cvtColor()函数可用于颜色空间的转换，例如RGB转HSV，RGB转YUV等等。这里笔者用它来转灰度图，即RGB2GRAY，出现了错误。/* various operations of Mat I */Mat grayI;cvtColor(I, grayI, COLOR_BGR2GRAY); 解决根据上图控制台的报错提示 OpenCV Error:

OpenCV计时方法问题描述跑一个程序除了看它报不报错，还得计算时间效率对吧。那么在基于C++的OpenCV工程中如何计时呢？解决方案getTickCount函数double t = (double)getTickCount();/*** various operations ***/t = (getTickCount() - t) / getTickFrequency();cout <<

OpenCV：Matrix type矩阵类型宏定义探究老司机可能会知道CV_8UC3=16，CV_32FC3=21,那么这些数字到底是怎么定义的呢？

OpenCV：图片读取函数imread的文件路径写法cv::Mat cv::imread( const &string filename, int flags=1)//文件在当前目录下Mat img=imread("test.jpg");//不在当前目录//使用双反斜杠img=imread("folder\\folder2\\test.jpg");img=imread("

OpenCV：批量读取图片方法1：将图片文件名称改为编号，例如”i.bmp”，其中i=1,2,…,Nchar filename[100];Mat img[N];for(int i=0;i<N;i++){ sprintf(filename,"PATH/%d.bmp",i+1); img[i]=imread(filename); //... other operations

LeetCode: 26. Remove Duplicates from Sorted Array 删除有序数组中的重复元素问题描述Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.Do not allocate

问题描述平方串： 形如string s = T + T的字符串目标： 对于字符串s，除去若干字符使其成为平方串，求该平方串的最大长度。思路与实现将s分成两半，求两个子串的最大子序列长度（longest common subsequence）的最大值ans，最长平方串长度就是2*ans。const int MAXN = 50;int c[MAXN][MAXN] = { 0 };// s