leetcode 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].

Note:
Try to come up as many solutions as you can, there are at least 3 different ways to solve this problem.

class Solution {public:void rotate(vector<int>& nums, int k) {if (nums.size()<2)return;if ( k <= 0)return;k = k%nums.size();vector<int>aa = vector<int>(nums.begin(), nums.end()-k);for (int i = nums.size() - 1;i>=nums.size() -k;  i--)aa.insert(aa.begin(),nums[i]);nums = aa;}};

accept