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…

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 切片 递归 日期 题目地址:https://leetcode.com/problems/rotate-array/description/ 题目描述 Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the 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 solve this pro…

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]. 将数组的内容倒置,看例子就知道是什么意思: class Solution { public: void rotate(vector<int>& nums, int k) { if(k > n…

189. Rotate Array Total Accepted: 55073 Total Submissions: 278176 Difficulty: Easy 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…

Question 189. Rotate Array Solution 题目大意:数组中最后一个元素移到第一个,称动k次 思路:用笨方法,再复制一个数组 Java实现: public void rotate(int[] nums, int k) { int[] numsCopy = Arrays.copyOf(nums, nums.length); for (int i=0; i<nums.length; i++) { nums[(i+k)%nums.length] = numsCopy[i];…

189. Rotate Array[easy] 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 differen…

Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1,2,3,4…

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…

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]. 解题思路: JAVA实现如下: public void rotate(int[] nums, int k) { k%=nums.length; k=nums.length-k; int[] nums2=ne…

题目描述: 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 th…

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…

---恢复内容开始--- Description Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: [1,2,3,4,5,6,7] and k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps t…

#-*- coding: UTF-8 -*-#由于题目要求不返回任何值,修改原始列表,#因此不能直接将新生成的结果赋值给nums,这样只是将变量指向新的列表,原列表并没有修改.#需要将新生成的结果赋予给nums[:],才能够修改原始列表class Solution(object):    def rotate(self, nums, k):        """        :type nums: List[int]        :type k: int        :…

题意:将数组旋转k次,如将数组[1,2,3,4,5]旋转1次得到[2,3,4,5,1],将数组[1,2,3,4,5]旋转2次得到[3,4,5,1,2]..... 本质是将数组分成两部分a1,a2,...ak以及ak+1....an两部分,然后将两部分进行交换. 我的解法是将数组分成两部分a1,a2,.....an-k-1以及an-k,.....an,然后将两部分分别反转得到数组ank-1,.....,a2,a1,an......an-k 然后将这个数组反转得到an-k,.....an,a1,a2…

这是悦乐书的第184次更新,第186篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第43题(顺位题号是189).给定一个数组,将数组向右旋转k步,其中k为非负数.例如: 输入:[1,2,3,4,5,6,7],k = 3 输出:[5,6,7,1,2,3,4] 说明: 向右旋转1步:[7,1,2,3,4,5,6] 向右旋转2步:[6,7,1,2,3,4,5] 向右旋转3步:[5,6,7,1,2,3,4] 输入:[ - 1,-100,3,99],k = 2 输出:[3,9…

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]. 解答:K 如果大于length,对 k 求余 public class Solution { public int[] rotate(int[] nums, int k) { if(nums == null…

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 pr…

题目标签:Array 题目给了我们一个数组 和 k. 让我们 旋转数组 k 次. 方法一: 这里有一个很巧妙的方法: 利用数组的length - k 把数组 分为两半: reverse 左边和右边的数组: reverse 总数组. 举一个例子: 1 2 3 4 5 6 7 如果k = 3 的话, 会变成 5 6 7 1 2 3 4 1 2 3 4 5 6 7 middle = 7 - 3 = 4,分为左边 4个数字,右边 3个数字 4 3 2 1 7 6 5 分别把左右reverse 一下 5…

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…

DescriptionHintsSubmissionsDiscussSolution   Pick One 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,…

［抄题］: 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]. [暴力解法]: 时间分析: 空间分析: [优化后]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩corner case］: ［思维问题］: swap函数都忘了,也是醉了 k步可能很大,所…

http://oj.leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ 将一个升序的数组转换成 height balanced BST高度平衡的二叉搜索树,根据二叉搜索树的特征,所有比根节点小的值,都在根节点的左边,所有比根节点大的值,都在根节点的右边.建立的过程就是一个个的插入.但要求是高度平衡的,即不能是各种偏的那样,否则的话,搜索的代价会增大,最佳的时候是O(height),height balanced的时候…

将包含 n 个元素的数组向右旋转 k 步.例如,如果  n = 7 ,  k = 3,给定数组  [1,2,3,4,5,6,7]  ,向右旋转后的结果为 [5,6,7,1,2,3,4].注意:尽可能找到更多的解决方案,这里最少有三种不同的方法解决这个问题. 详见:https://leetcode.com/problems/rotate-array/description/ Java实现: 方法一: class Solution { public void rotate(int[] nums, i…

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…

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    ---…

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…

1.题目描述 2.代码 void rotate(vector<int>& nums, int k) { ) return ; && (k / nums.size()) % == ) reverse( nums.begin(), nums.end() ); k %= nums.size() ; vector<int> ans; auto rb = nums.rbegin(); stack<int> s; ; i--,rb++) { s.push(*…

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…