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