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? [题目解析] 这个题目的要求是把一个二维数组向右旋转九十度,就地实现. [思路1] 相比较矩阵的转置,矩阵的旋转有什么不同呢?看下面的例子: 1,2,3 1,3,2      1,2,3 2,3,1 3,2,1    ---…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 48: Rotate Imagehttps://leetcode.com/problems/rotate-image/ You are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Could you do this in-place? ===…

一天一道LeetCode系列 (一)题目 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? (二)解题 90度旋转图像,我们不难看出 经过这样的变换后,图像就旋转了90度. class Solution { public: void rotate(vector<vecto…

Difficulty:medium  More:[目录]LeetCode Java实现 Description https://leetcode.com/problems/rotate-image/ 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…

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 日期 题目地址:https://leetcode.com/problems/rotate-image/description/ 题目描述 You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Note: Y…

Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note:Try to come up as many solutions as you can, there are at least 3 different ways to solve this pro…

Given a list, rotate the list to the right by k places, where k is non-negative. For example:Given 1->2->3->4->5->NULL and k = 2,return 4->5->1->2->3->NULL. 这个题目的大意是要把链表的尾部的k节点旋转到头部,但是k可能大于链表的长度.此时要旋转的长度就是k%list.length. 解决这个问…

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? 最简单的想法,两重循环. 第一重循环是对于矩阵的层次(从外到内) 第二重循环是对于每一层次的四元素轮换 举例: 1 2 3 4 5 6 7 8 9 最外层: 1-->3-->9-->7 2…

Given a list, rotate the list to the right by k places, where k is non-negative. For example:Given 1->2->3->4->5->NULL and k = 2,return 4->5->1->2->3->NULL. 将链表从右边数第k个开始后面的全部交换到链表的左侧.例如对于1,2,3,4,5,6 和 k = 2,就有交换之后的节点就是5,6,1,2…

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?题目要就地算法,那么可以通过折叠矩阵上下以及斜对角线折叠来实现,代码如下: class Solution { public: void rotate(vector<vector<int>>& matrix…