目录 # 前端与算法 leetcode 189. 旋转数组 题目描述 概要 提示 解析 算法 # 前端与算法 leetcode 189. 旋转数组 题目描述 189. 旋转数组 概要 把他当做一到简单的题来做,不要想太多了就好也可以不整那些花里胡哨的,直接旋转数组n次,我一开始也想到了这个办法,但是觉得太简单而且效率低下,想了很久也没想到合适的办法 提示 使用额外的数组 解析 用一个额外的数组将每个元素放到对应的位置就好 下标为i的位置对应(i+k)%数组长度 ,然后把新的数组拷贝(深拷贝)到原…

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…

189. 旋转数组 LeetCode189. Rotate Array 题目描述 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. 示例 1: 输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 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] 示例 2: 输入: [-1,-100,3,99] 和 k = 2 输出:…

189. 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]. 将数组向右旋转k位. 代码如下: class Solution { public: void rotate(vector<int>& nums, int k)…

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…

189. 旋转数组 给定一个数组,将数组中的元素向右移动 k 个位置,其中 k 是非负数. 示例 1: 输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 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] 示例 2: 输入: [-1,-100,3,99] 和 k = 2 输出: [3,99,-1,-100] 解释: 向右旋转 1 步: [9…

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…

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…