Rotate Array

arraymathtwo pointers

Problem Statement

Given an integer array nums , rotate the array to the right by k steps, where k is non-negative.

Examples

Example 1

Input: nums = [1,2,3,4,5,6,7], k = 3
Output: [5,6,7,1,2,3,4]
rotate 1 steps to the right: [7,1,2,3,4,5,6]
rotate 2 steps to the right: [6,7,1,2,3,4,5]
rotate 3 steps to the right: [5,6,7,1,2,3,4]

Example 2

Input: nums = [-1,-100,3,99], k = 2
Output: [3,99,-1,-100]
rotate 1 steps to the right: [99,-1,-100,3]
rotate 2 steps to the right: [3,99,-1,-100]

Constraints

1 <= nums.length <= 10 ^5

-2 ^31 <= nums[i] <= 2 ^31 - 1

0 <= k <= 10 ^5

Follow up:

Try to come up with as many solutions as you can. There are at least three different ways to solve this problem.

Could you do it in-place with O(1) extra space?

🤔

Medium

Difficulty

Topic Info

ModuleDSA

CategoryArray

Sub-topicMath