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].

Solution:

public class Solution {
    public void rotate(int[] nums, int k) {
        k = k%nums.length;
        reverse(nums, 0, nums.length-k-1);
        reverse(nums, nums.length-k, nums.length-1);
        reverse(nums, 0, nums.length-1);
    }
    
    public void reverse(int[] nums, int l, int r){
        while(l<r){
            int tmp = nums[l];
            nums[l++] = nums[r];
            nums[r--] = tmp;
        }
    }
}