03 2015 档案
摘要：The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return th
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摘要：The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return al
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摘要：Given an integer array nums, find the subarray with the largest sum, and return its sum. Example 1: Input: nums = [-2,1,-3,4,-1,2,1,-5,4] Output: 6 Ex
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摘要：You are given a 0-indexed array of integers nums of length n. You are initially positioned at nums[0]. Each element nums[i] represents the maximum len
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摘要：You are given an integer array nums. You are initially positioned at the array's first index, and each element in the array represents your maximum ju
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摘要：Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals
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摘要：You are given an array of non-overlapping intervals intervals where intervals[i] = [starti, endi] represent the start and the end of the ith interval
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摘要：Initializing "cv::StereoBM bm.state->disp12MaxDiff" should be careful, inappropriate value might crash your program. Suggested that you set it to -1 t...
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摘要：Given a positive integer n, generate an n x n matrix filled with elements from 1 to n2 in spiral order. Example 1: Input: n = 3 Output: [[1,2,3],[8,9,
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摘要：Given an m x n matrix, return all elements of the matrix in spiral order. Example 1: Input: matrix = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,2,3,6,9,8,7,
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摘要：Given a collection of numbers, nums, that might contain duplicates, return all possible unique permutations in any order. Example 1: Input: nums = [1,
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摘要：Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order. Example 1: Input: nums = [1,2,
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摘要：这是Combinations 组合项的延伸，在这里，我们允许不同的顺序出现，那么新的题目要求如下：Given two integersnandk, return all possible combinations ofknumbers out of 1 ...n.For example,Ifn= 4...
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摘要：The set [1, 2, 3, ..., n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, we get the following s
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摘要：Given the head of a linked list, rotate the list to the right by k places. Example 1: Input: head = [1,2,3,4,5], k = 2 Output: [4,5,1,2,3] Example 2:
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摘要：cvSave这个函数是OpenCV中用来保存某个数据类型到文件中常用的函数，它原本共有五个参数，但是在VS2010中只需要填前两个，而在Linux必须填满五个，否则会出错，如下：// VS2010cvSave("m.xml", mat);// LinuxcvSave("m.xml", mat, NU...
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摘要：如果我们想把OpenCV中的矩阵数据类型cv::Mat保存在一个文件中，可以使用如下的代码：void writeMatToFile(cv::Mat& m, const char* filename) { ofstream fout(filename); if(!fout) { ...
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摘要：You are given an m x n integer array grid. There is a robot initially located at the top-left corner (i.e., grid[0][0]). The robot tries to move to th
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摘要：There is a robot on an m x n grid. The robot is initially located at the top-left corner (i.e., grid[0][0]). The robot tries to move to the bottom-rig
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摘要：Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right, which minimizes the sum of all numbers along its path.
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摘要：Given an array of strings words and a width maxWidth, format the text such that each line has exactly maxWidth characters and is fully (left and right
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摘要：Given a string path, which is an absolute path (starting with a slash '/') to a file or directory in a Unix-style file system, convert it to the simpl
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摘要：Given a non-negative integer x, return the square root of x rounded down to the nearest integer. The returned integer should be non-negative as well.
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摘要：Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. You have the following three operations
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摘要：Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to 0's. You must do it in place. Example 1: Input: matrix = [[
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摘要：Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in
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摘要：Given two strings s and t of lengths m and n respectively, return the minimum window substring of s such that every character in t (including duplicat
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摘要：Download CMake 2.8.12Extract the file, and run "./bootstrap", then "make", then "sudo make install"Add some dependencies, run "sudo apt-get install bu...
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摘要：Download OpenCV 2.4.10Download CMake 2.8Open CMake and choose the source code directory and build binary directoryThen click "Configure", and "Generat...
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摘要：Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. You may return the answer in any order. Exampl
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摘要：Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequent
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摘要：有时候在项目中我们需要检测当前连接在机子上的摄像头的数量，可以通过下面的代码实现，其中连接摄像头的最大数量maxCamNum可以任意修改：/** * Count current camera number */int countCamera() { int maxCamNum = 5; ...
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摘要：Add in the system Path:C:\opencv\build\x86\vc10\bin;Project->Project Property->Configuration Properties->VC++Directories ->Include Directories:C:\open...
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摘要：Qt项目在打包发布之后都需要有个个性的程序图标和窗口图标，这样会使程序更加美观大方，下面我们分别来看如何给程序和窗口分别添加图标。我们需要两种格式的图片，一种是.ico的，用来给程序添加图标，一种是.bmp或是.png的，用来给窗口添加图标。- 程序添加图标如果使用的Qt Creator，那么用记事...
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摘要：Given an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The r
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摘要：Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relati
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摘要：Download CMake 2.8.2Download OpenCV 2.4.11Download Qt 5.4Highly improtant note: The installation directory should not contain any space or non-English...
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摘要：There is an integer array nums sorted in non-decreasing order (not necessarily with distinct values). Before being passed to your function, nums is ro
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摘要：There is an integer array nums sorted in ascending order (with distinct values). Prior to being passed to your function, nums is possibly rotated at a
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摘要：Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example, the 32-bit
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摘要：You are given an m x n integer matrix matrix with the following two properties: Each row is sorted in non-decreasing order. The first integer of each
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摘要：Given a rows x cols binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area. Example 1: Input: matri
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摘要：Given an array of integers heights representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle
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摘要：Reverse bits of a given 32 bits unsigned integer. Example 1: Input: 00000010100101000001111010011100 Output: 00111001011110000010100101000000 Explanat
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摘要：Given the head of a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should p
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摘要：We can scramble a string s to get a string t using the following algorithm: If the length of the string is 1, stop. If the length of the string is > 1
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摘要：An n-bit gray code sequence is a sequence of 2n integers where: Every integer is in the inclusive range [0, 2n - 1], The first integer is 0, An intege
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摘要：以下转换代码摘自维基百科 Wikipedia：/* The purpose of this function is to convert an unsigned binary number to reflected binary Gray code. Th...
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摘要：C++中的stringstream是专门用来处理字符串流的，可以按顺序将string或int都拼接起来，而不用把int转换为string格式，使用方法如下：#include #include #include stringstream strstream;std::string s;std::str...
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摘要：A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ
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摘要：这三种数据类型在实际运用中经常需要互相转换，那么这里小结下它们之间的转换方法：- Qstring & stringQt中封装的类十分强大，其成员函数数量之多比STD有过之而无不及，许多程序员抱怨Qt非要整个自己的QTD，为啥不直接支持STD，但是我想说某些时候QTD完全可以替代STD，就算不想完全替...
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摘要：Given an integer array nums that may contain duplicates, return all possible subsets (the power set). The solution set must not contain duplicate subs
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摘要：Qt中QComboBox 和 QSpinBox 是两个很常用的空间，QComboBox 是下拉菜单，而 QSpinBox 是调参数的神器，所以它们的用法十分必要熟练掌握。首先来看 QComboBox，这个下拉菜单中的值可以在UI Designer中都设定好，位于第一个位置的就是默认值，也就是程序启动...
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摘要：Given an integer array nums of unique elements, return all possible subsets (the power set). The solution set must not contain duplicate subsets. Retu
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摘要：Reverse a linked list from position m to n. Do it in one-pass. Note: 1 ≤ m ≤ n ≤ length of list. Example: Input: 1->2->3->4->5->NULL, m = 2, n = 4 Out
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