Second understanding of rotating arrays

Given an array, rotate the elements of the array k positions to the right, where k is a non-negative number.

First, let's analyze the three algorithms together:

Code:

The NONONO idea is too inefficient!

 Idea 2: Is there a better way to use space for time?

 

 Wow! Three ideas are great! ! !

Rotate array OJ link: https://leetcode-cn.com/problems/rotate-array/

Guys, take the time to learn! ! !