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Given a binary tree, you need to compute the length of the diameter of the tree. The diameter of a binary tree is the length of the longestpath betwee 阅读全文
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Given an m x n binary matrix mat, return the distance of the nearest 0 for each cell. The distance between two adjacent cells is 1. Example 1: Input: 阅读全文
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Given the root of a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus 阅读全文
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Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there ar 阅读全文
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Given a list of 24-hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two time points in the list. Examp 阅读全文
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TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL such as http 阅读全文
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我之前有一篇博客Convert PLY to VTK Using PCL 1.6.0 or PCL 1.8.0 使用PCL库将PLY格式转为VTK格式展示了如何将PLY格式文件转化为VTK格式的文件，在文章的最后提到了VTK文件保存纹理的两种方式，第一种是需要有texture的图片，然后每个点存储上 阅读全文
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When use function 'pcl::io::vtkPolyDataToPointCloud' in PCL 1.6.0, one may have error as follows: This happens because function 'pcl::io::vtkPolyDataT 阅读全文
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Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined as an inte 阅读全文
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Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Note: There are at 阅读全文
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Let's play the minesweeper game (Wikipedia, online game)! You are given a 2D char matrix representing the game board. 'M' represents an unrevealed min 阅读全文
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Suppose you have N integers from 1 to N. We define a beautiful arrangement as an array that is constructed by these N numbers successfully if one of t 阅读全文
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Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. Example 1: Input: [0,1] Output: 2 Explanation: [0 阅读全文
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Given a string s and a string array dictionary, return the longest string in the dictionary that can be formed by deleting some of the given string ch 阅读全文
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花了将近一周的时间的，终于在VS2010成功的编译了最新版的3D Slicer 4.7.0，感觉快要崩溃了。Slicer用了20多个外部的库，全都要一起编译，完整编译一次起码要七八个小时，光VS的Output输出窗口有十万多行，复制到txt中，文本内容居然有26MB之多，可怕！经过台式机和笔记本分别 阅读全文
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Given a word, you need to judge whether the usage of capitals in it is right or not. We define the usage of capitals in a word to be right when one of 阅读全文
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Given an integer array nums and an integer k, return true if nums has a continuous subarray of size at least two whose elements sum up to a multiple o 阅读全文
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Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 1000. Example 1:Input: "bbbab 阅读全文
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Given the root of a tree, you are asked to find the most frequent subtree sum. The subtree sum of a node is defined as the sum of all the node values 阅读全文
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Given scores of N athletes, find their relative ranks and the people with the top three highest scores, who will be awarded medals: "Gold Medal", "Sil 阅读全文
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Given a circular array (the next element of the last element is the first element of the array), print the Next Greater Number for every element. The 阅读全文
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Given a binary search tree (BST) with duplicates, find all the mode(s) (the most frequently occurred element) in the given BST. Assume a BST is define 阅读全文
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Given a List of words, return the words that can be typed using letters of alphabet on only one row's of American keyboard like the image below. Examp 阅读全文
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Given an integer, return its base 7 string representation. Example 1: Example 2: Note: The input will be in range of [-1e7, 1e7]. 这道题给了我们一个数，让我们转为七进制的 阅读全文
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You need to find the largest value in each row of a binary tree. Example: 这道题让我们找二叉树每行的最大的结点值，那么实际上最直接的方法就是用层序遍历，然后在每一层中找到最大值，加入结果res中即可，参见代码如下： 解法一： 阅读全文
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Given a matrix of M x N elements (M rows, N columns), return all elements of the matrix in diagonal order as shown in the below image. Example: Note: 阅读全文
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Given a binary tree, find the leftmost value in the last row of the tree. Example 1: Example 2: Note: You may assume the tree (i.e., the given root no 阅读全文
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You are given two integer arrays nums1 and nums2 both of unique elements, where nums1 is a subset of nums2. Find all the next greater numbers for nums 阅读全文
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In LLP world, there is a hero called Teemo and his attacking can make his enemy Ashe be in poisoned condition. Now, given the Teemo's attacking ascend 阅读全文
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You are given a list of non-negative integers, a1, a2, ..., an, and a target, S. Now you have 2 symbols + and -. For each integer, you should choose o 阅读全文
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For a web developer, it is very important to know how to design a web page's size. So, given a specific rectangular web page’s area, your job by now i 阅读全文
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Given an integer array, your task is to find all the different possible increasing subsequences of the given array, and the length of an increasing su 阅读全文
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There is a ball in a maze with empty spaces and walls. The ball can go through empty spaces by rolling up, down, left or right, but it won't stop roll 阅读全文
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将Qt4的项目迁到Qt5中并不需要新建一个Qt5的工程，可以直接在原工程文件上修改，这里我们使用的是VS2010和Qt5.4的环境，我们需要做以下修改： 1. 在工程里找到这个文件：工程名.vcxproj.user,将里面的Qtdir路径修改为：C:\Qt\5.4\msvc2010_opengl。我 阅读全文
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Given a binary array, find the maximum number of consecutive 1s in this array if you can flip at most one 0. Example 1: Input: [1,0,1,1,0] Output: 4 E 阅读全文
Solve Error : Undefined function or variable ‘setInitialWorkingFolder’. Error in matlabrc (line 197)
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When compile program using Visual Studio 2015, Matlab 2016b, and OpenCV 3.1.0, one might get the error as follow: Undefined function or variable ‘setI 阅读全文
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Given an array of scores that are non-negative integers. Player 1 picks one of the numbers from either end of the array followed by the player 2 and t 阅读全文
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By now, you are given a secret signature consisting of character 'D' and 'I'. 'D' represents a decreasing relationship between two numbers, 'I' repres 阅读全文
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在Qt和PCL联合编译的过程中，会出现各种各样的错误，解决这些错误的过程真是痛苦万分，所以总结一些常见错误方便自己也方便他人。比如我们要编译PCL1.8.0中的apps中的point_cloud_editor这个应用时，可能会遇到如下错误： 这个错误的解决方法很简单，哪个cpp文件产生了这些错误，就 阅读全文
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在编译一些大型SDK的时候，比如Qt，OpenCV, PCL, VTK, ITK等等，在VS中，我们需要将编译生成的.lib文件加入Linker->Input中，但是往往生成的.lib文件有很多很多个，一个一个的把名字加进来实在是太累，我们可以用cmd命令行来快速获得某个文件夹下的所有文件的名字，打 阅读全文
