给定一个 n × n 的二维矩阵表示一个图像.将图像旋转 90 度(顺时针).注意:你必须在原矩阵中旋转图像,请不要使用另一个矩阵来旋转图像.例 1:给出的输入矩阵 = [  [1,2,3],  [4,5,6],  [7,8,9]],旋转输入矩阵,使其变为 :[  [7,4,1],  [8,5,2],  [9,6,3]]例 2:给出的输入矩阵 =[  [ 5, 1, 9,11],  [ 2, 4, 8,10],  [13, 3, 6, 7],  [15,14,12,16]], 旋转输入矩阵,使其…

给定一个 n × n 的二维矩阵表示一个图像. 将图像顺时针旋转 90 度. 说明: 你必须在原地旋转图像,这意味着你需要直接修改输入的二维矩阵.请不要使用另一个矩阵来旋转图像. 示例 1: 给定 matrix = [ [1,2,3], [4,5,6], [7,8,9] ], 原地旋转输入矩阵,使其变为: [ [7,4,1], [8,5,2], [9,6,3] ] 示例 2: 给定 matrix = [ [ 5, 1, 9,11], [ 2, 4, 8,10], [13, 3, 6, 7], […

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up:Could you do this in-place? 在计算机图像处理里,旋转图片是很常见的,由于图片的本质是二维数组,所以也就变成了对数组的操作处理,翻转的本质就是某个位置上数移动到另一个位置上,比如用一个简单的例子来分析: 1  2  3 7  4  1 4  5  6 -…

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 解题思路: 找规律即可,JAVA实现如下: static public void rotate(int[][] matrix) { int[][] matrixArray=new int[matrix.length][ma…

Rotate Image You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 思路:事实上就是旋转数组.没有什么难度.代码例如以下: public class Solution { public void rotate(int[][] matrix) { int[][] a…

题目在这里 https://leetcode.com/problems/rotate-image/ [个人分析] 这个题目,我觉得就是考察基本功.考察细心的,算法方面没有太多东西,但是对于坐标的使用有较高要求. 放了两个版本的答案,第一个版本是自己写的,第二个是目前最佳答案的Java改写. [代码注释] Solution1: 思路比较直接.既然要求in-place,那就在修改之前,先保存原先在那个位置上的值,然后尾巴咬尾巴的去修改:大意可以参考下图 Solution2: 偏数学的方法,先把矩阵“…

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the…

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the…

题目: You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note:You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do…

You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the…