Given a matrix A, return the transpose of A. The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix. Example 1: Input: [[1,2,3],[4,5,6],[7,8,9]] Output: [[1,4,7],[2,5,8],[3,6,9]] Ex…

A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same element. Now given an M x N matrix, return True if and only if the matrix is Toeplitz. Example 1: Input: matrix = [   [1,2,3,4],   [5,1,2,3],   [9,5,1,2] ] Output: True…

problem 867. Transpose Matrix solution: class Solution { public: vector<vector<int>> transpose(vector<vector<int>>& A) { ].size(); vector<vector<int>> res(n, vector<int>(m));//err... ; i<m; ++i) { ; j<n;…

题目描述 给定一个矩阵 A, 返回 A 的转置矩阵. 矩阵的转置是指将矩阵的主对角线翻转,交换矩阵的行索引与列索引. 示例 1: 输入:[[1,2,3],[4,5,6],[7,8,9]] 输出:[[1,4,7],[2,5,8],[3,6,9]] 示例 2: 输入:[[1,2,3],[4,5,6]] 输出:[[1,4],[2,5],[3,6]] 提示: 1 <= A.length <= 1000 1 <= A[0].length <= 1000 思路 新建一个矩阵res,res[i]…

package y2019.Algorithm.array; /** * @ProjectName: cutter-point * @Package: y2019.Algorithm.array * @ClassName: Transpose * @Author: xiaof * @Description: 867. Transpose Matrix * * Given a matrix A, return the transpose of A. * The transpose of a mat…

Question 867. Transpose Matrix Solution 题目大意:矩阵的转置 思路:定义一个转置后的二维数组,遍历原数组,在赋值时行号列号互换即可 Java实现: public int[][] transpose(int[][] A) { int[][] B = new int[A[0].length][A.length]; for (int i = 0; i < A.length; i++) { for (int j = 0; j < A[0].length; j++…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 先构建数组再遍历实现翻转 日期 题目地址:https://leetcode.com/problems/transpose-matrix/description/ 题目描述 Given a matrix A, return the transpose of A. The transpose of a matrix is the matrix flipp…

题目要求 Given a matrix A, return the transpose of A. The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix. 题目分析及思路 题目要求得到矩阵的转置矩阵.可先得到一个行数与原矩阵列数相等.列数与原矩阵行数相等的矩阵,再对原矩阵进行遍历. python代码​ c…

[题干描述] Given a matrix A, return the transpose of A. The transpose of a matrix is the matrix flipped over it's main diagonal, switching the row and column indices of the matrix.(一矩阵A,返回其转置) [思路] 直接处理,A[i][j]的值赋值给output[j][i]. [python代码] input = [[1, 2…

In MATLAB, there is a very useful function called 'reshape', which can reshape a matrix into a new one with different size but keep its original data. You're given a matrix represented by a two-dimensional array, and two positive integers r and c rep…

class Solution: def transpose(self, A: List[List[int]]) -> List[List[int]]: return [list(i) for i in list(zip(*A))]…

In a 2 dimensional array grid, each value grid[i][j] represents the height of a building located there. We are allowed to increase the height of any number of buildings, by any amount (the amounts can be different for different buildings). Height 0 i…

Given a 2D integer matrix M representing the gray scale of an image, you need to design a smoother to make the gray scale of each cell becomes the average gray scale (rounding down) of all the 8 surrounding cells and itself. If a cell has less than 8…

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more th…

Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0. s = "loveleetcode", return 2. Note: You may assume the string contain only lowercase…

Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…

We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. For each node, it will be subdivided into four children nodes until the values in the region it repres…

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example 1: Input: a = 1, b = 2 Output: 3 Example 2: Input: a = -2, b = 3 Output: 1   class Solution(object): def getSum(self, a, b): """ :type a…

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 the following cases holds: All letters in this word are capitals, like "USA". All letters in t…

Invert a binary tree. Example: Input: 4 / \ 2 7 / \ / \ 1 3 6 9 Output: 4 / \ 7 2 / \ / \ 9 6 3 1 Trivia:This problem was inspired by this original tweet by Max Howell: Google: 90% of our engineers use the software you wrote (Homebrew), but you can’t…

Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A. You may return any answer array that satisfies this condition. Example 1: Input: [3,1,2,4] Output: [2,4,3,1] T…

Problem Description: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given…

You're now a baseball game point recorder. Given a list of strings, each string can be one of the 4 following types: Integer (one round's score): Directly represents the number of points you get in this round. "+" (one round's score): Represents…

A website domain like "discuss.leetcode.com" consists of various subdomains. At the top level, we have "com", at the next level, we have "leetcode.com", and at the lowest level, "discuss.leetcode.com". When we visit…

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. Example 1: Input: "Let's take LeetCode contest" Output: "s'teL ekat edoCteeL tsetnoc"…

We are to write the letters of a given string S, from left to right into lines. Each line has maximum width 100 units, and if writing a letter would cause the width of the line to exceed 100 units, it is written on the next line. We are given an arra…

On a N * N grid, we place some 1 * 1 * 1 cubes that are axis-aligned with the x, y, and z axes. Each value v = grid[i][j] represents a tower of v cubes placed on top of grid cell (i, j). Now we view the projection of these cubes onto the xy, yz, and…

Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image. To flip an image horizontally means that each row of the image is reversed.  For example, flipping [1, 1, 0] horizontally results in [0,…

The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calculate the Hamming distance. Note:0 ≤ x, y < 231. Example: Input: x = 1, y = 4 Output: 2 Explanation: 1…

International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a"maps to ".-", "b" maps to "-...", "c" maps to "-.-.", and so on. Fo…