Rotate Array 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…

题目:rotate list 解法1: <span style="font-size:18px;">/**LeetCode Rotate List:Given a list, rotate the list to the right by k places, where k is non-negative. * 题目:循环移动链表,等价于将链表从右边数的k个节点移动到表的前方 * 思路:移动倒是简单.重点是要找到链表倒数的k个数,就等价于找到倒数第K+1个数,设置两个指针,…

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/array-of-doubled-pairs/description/ 题目描述 Given an array of integers A with even length, return true if and only if it is possible to reord…

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 排序 日期 题目地址:https://leetcode.com/problems/array-partition-i/#/description 题目描述 Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (…

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/search-a-2d-matrix/description/ 题目描述 A zero-indexed array A of length N contains all integers from 0 to N-1. Find and return the longest l…

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?     假设旋转的时候,左上角元素为(l,l),右下角元素为(r,r) 则旋转的时候 (l,l+1)=(r-1,l) 最上面一排  (r-1,l)=(r,r-1)左边一排 (r,r-1)=(l+1,…

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. 题目关键点:k可能比链表长度还大, 需要获取链表长度len, 用 k % len 获取具体需要移动的数字. class Solution…

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:我的思路,先沿对角线对称,再左右对称. void rotate(int **matrix, int n) { //先沿对角线对称 ; i < n; i++) { ; j < i; j++) { int tmp = m…

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: 每次转着圈挪四个元素,这步只需要一个int的额外空间,想象一个方阵 哦不好意思,这个太不专业了,咱换个大一点6×6的 草图上比划比划第二层的元素怎么移动,一次Accept的感觉好爽 代码: void rotate(v…

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. start with an example. Given [0,1,2], rotate 1 steps to the right -&…